Bedrock is the solid rock at or below the land surface. Over much of Ireland, the bedrock is covered by materials such as soil and gravel. The Bedrock map shows what the land surface of Ireland would be made up of if these materials were removed. As the bedrock is commonly covered, bedrock maps are an interpretation of the available data. This map shows the locations of the cross-sections lines from the GSI published paper 100k booklet series.This map is to the scale 1:100,000. This means it should be viewed at that scale. When printed at that scale 1cm on the map relates to a distance of 1km.It is a vector dataset. Vector data portray the world using points, lines, and polygons (areas).The data is shown as lines. Each line holds information on the cross section name, its length and contains a link to the cross section pdf.

Bedrock is the solid rock at or below the land surface. Over much of Ireland, the bedrock is covered by materials such as soil and gravel. The Bedrock map shows what the land surface of Ireland would be made up of if these materials were removed. As the bedrock is commonly covered, bedrock maps are an interpretation of the available data. This map shows the locations of the cross-sections lines from the GSI published paper 100k booklet series.This map is to the scale 1:100,000. This means it should be viewed at that scale. When printed at that scale 1cm on the map relates to a distance of 1km.It is a vector dataset. Vector data portray the world using points, lines, and polygons (areas).The data is shown as lines. Each line holds information on the cross section name, its length and contains a link to the cross section pdf.

Bedrock is the solid rock at or below the land surface. Over much of Ireland, the bedrock is covered by materials such as soil and gravel. The Bedrock map shows what the land surface of Ireland would be made up of if these materials were removed. As the bedrock is commonly covered, bedrock maps are an interpretation of the available data. This map shows the locations of the cross-sections lines from the GSI published paper 100k booklet series.This map is to the scale 1:100,000. This means it should be viewed at that scale. When printed at that scale 1cm on the map relates to a distance of 1km.It is a vector dataset. Vector data portray the world using points, lines, and polygons (areas).The data is shown as lines. Each line holds information on the cross section name, its length and contains a link to the cross section pdf.

Bedrock is the solid rock at or below the land surface. Over much of Ireland, the bedrock is covered by materials such as soil and gravel. The Bedrock map shows what the land surface of Ireland would be made up of if these materials were removed. As the bedrock is commonly covered, bedrock maps are an interpretation of the available data. Geologists map and record information on the composition and structure of rock outcrops (rock which can be seen on the land surface) and boreholes (a deep narrow round hole drilled in the ground). Areas are drawn on a map to show the distribution of rocks. A borehole is any hole drilled or dug into the ground. The hole is usually deep, narrow and round. The material (soil and or rock) from the hole is collected and tested in a laboratory to find out the structure and type of the soil and or rock beneath the ground. A borehole record or log is a written description of the material that comes out of the ground as a result of drilling a borehole. Bedrock boreholes are usually deep (can reach up to 1000m). We drill boreholes to improve and update our bedrock, quaternary sediments and groundwater maps. We store the samples (core) and these are available to view by appointment. We’re in the process of scanning all the core and the images will be available online when completed. The Geological Lines layer shows the details of the structural geology; faults, folds and unconformities. Faults and folds are the result of great pressure being applied to rock across a whole continent or more. These rocks will either break under the pressure, forming faults, or they will bend to form folds. Faults are recorded in the Geological Lines layer as lines where the break in the rock meets the surface. Folds are shown only using the lines of their axes, synclinal (where the rock folds downwards) and anticlinal (where the rock folds upwards). Unconformities are where there is a gap in the rock record, typically where rock has been eroded away in the past and a new rock deposited on top.Geologists map and record information on the structural geology. Lines are drawn on a map to show the location and extent of these structures. The structural symbols layer is used to describe the geology of an area through dip and strike information. Dip and strike describe the behaviour of the rock bedding plane. To describe a geometric plane two values are required; the angle from horizontal that it is dipping and the direction that it is dipping. Geologists describe the dip direction by the strike value; this is the azimuth perpendicular to the steepest dip of the plane.The measurements that this layer contains give information about the geometry of the rock units under the ground. These measurements are the only way to see if the rocks are folded and faulted and how. With this information we can also start to see why the rocks have the shapes that they do.To produce this dataset, the bedrock geology 1:100,000 map was clipped to the North-Eastern Area. Historical information was compiled from mineral exploration reports and old geology maps. This new information was used to re-interpret the geology.Bedrock maps show the area of certain rock types, but more importantly, they also show the age of the rocks. One of the key ways that the age of a rock can be determined is by examining the microfossils that the rocks contain. Historical study of microfossils has shown the order in which microfossils appear in rocks, which can be used to give the age of the rocks themselves.The Palaeontology layers shows the position where fossils have been seen by geologists in thin sections from samples taken in the field and in boreholes, and is linked to a table describing the details of the fossils that were seen.The position of the fossils was taken from fieldwork and drilling carried out by GSI geologists, recently and historically, and from mineral exploration reports. This map is to the scale 1:50,000. This means it should be viewed at that scale. When printed at that scale 1cm on the map relates to a distance of 500 m.It is a vector dataset. Vector data portray the world using points, lines, and polygons (areas).The bedrock data is shown as polygons. Each polygon holds information on the rock unit name, its description, stratigraphy code (rock layers with age profile), lithology code (rock type) and map sheet number. Each polygon is linked to the bedrock lexicon table which has more detailed information such as a definition of the rock unit, rock types, age, thickness and other comments.The geological line data is shown as lines. Each line holds information on: description of the line, bedrock 100k map sheet number, style and label information. Other information if relevant such as name, stratigraphy code (rock layers with age profile) & lithology code (rock type). Each line is linked to the bedrock linework lexicon table which has more detailed information such as a definition of the rock unit, rock types, age, thickness and other comments. The structural symbols data is shown as points. Each point holds information on: the dip angle and direction, the strike angle and a description.The outcrop data is shown as polygons. The borehole data is shown as points. Each point holds information on the location of the borehole (X and Y coordinates), Borehole ID (borehole identifier), the length of the hole (metres), the angle the hole was drilled, azimuth (direction the hole was drilled), comments, county, 1:50,000 sheet number, prospecting licence number (PL), data source and contains a url to download a PDF of the borehole log.The palaeontology data is shown as points. Each point holds information on: the location of the fossil (X & Y), the townland or borehole where it was seen, the source of the data and the fossils within.

Bedrock is the solid rock at or below the land surface. Over much of Ireland, the bedrock is covered by materials such as soil and gravel. The Bedrock map shows what the land surface of Ireland would be made up of if these materials were removed. As the bedrock is commonly covered, bedrock maps are an interpretation of the available data. Geologists map and record information on the composition and structure of rock outcrops (rock which can be seen on the land surface) and boreholes (a deep narrow round hole drilled in the ground). Areas are drawn on a map to show the distribution of rocks. A borehole is any hole drilled or dug into the ground. The hole is usually deep, narrow and round. The material (soil and or rock) from the hole is collected and tested in a laboratory to find out the structure and type of the soil and or rock beneath the ground. A borehole record or log is a written description of the material that comes out of the ground as a result of drilling a borehole. Bedrock boreholes are usually deep (can reach up to 1000m). We drill boreholes to improve and update our bedrock, quaternary sediments and groundwater maps. We store the samples (core) and these are available to view by appointment. We’re in the process of scanning all the core and the images will be available online when completed. The Geological Lines layer shows the details of the structural geology; faults, folds and unconformities. Faults and folds are the result of great pressure being applied to rock across a whole continent or more. These rocks will either break under the pressure, forming faults, or they will bend to form folds. Faults are recorded in the Geological Lines layer as lines where the break in the rock meets the surface. Folds are shown only using the lines of their axes, synclinal (where the rock folds downwards) and anticlinal (where the rock folds upwards). Unconformities are where there is a gap in the rock record, typically where rock has been eroded away in the past and a new rock deposited on top.Geologists map and record information on the structural geology. Lines are drawn on a map to show the location and extent of these structures. The structural symbols layer is used to describe the geology of an area through dip and strike information. Dip and strike describe the behaviour of the rock bedding plane. To describe a geometric plane two values are required; the angle from horizontal that it is dipping and the direction that it is dipping. Geologists describe the dip direction by the strike value; this is the azimuth perpendicular to the steepest dip of the plane.The measurements that this layer contains give information about the geometry of the rock units under the ground. These measurements are the only way to see if the rocks are folded and faulted and how. With this information we can also start to see why the rocks have the shapes that they do.To produce this dataset, the bedrock geology 1:100,000 map was clipped to the Cork GeoUrban Area. Historical information was compiled from mineral exploration reports and old geology maps. This new information was used to re-interpret the geology.This map is to the scale 1:50,000. This means it should be viewed at that scale. When printed at that scale 1cm on the map relates to a distance of 500 m.It is a vector dataset. Vector data portray the world using points, lines, and polygons (areas).The bedrock data is shown as polygons. Each polygon holds information on the rock unit name, its description, stratigraphy code (rock layers with age profile), lithology code (rock type) and map sheet number. Each polygon is linked to the bedrock lexicon table which has more detailed information such as a definition of the rock unit, rock types, age, thickness and other comments.The geological line data is shown as lines. Each line holds information on: description of the line, bedrock 100k map sheet number, style and label information. Other information if relevant such as name, stratigraphy code (rock layers with age profile) & lithology code (rock type). Each line is linked to the bedrock linework lexicon table which has more detailed information such as a definition of the rock unit, rock types, age, thickness and other comments. The structural symbols data is shown as points. Each point holds information on: the dip angle and direction, the strike angle and a description.The outcrop data is shown as polygons. The borehole data is shown as points. Each point holds information on the location of the borehole (X and Y coordinates), Borehole ID (borehole identifier), the length of the hole (metres), the angle the hole was drilled, azimuth (direction the hole was drilled), comments, county, 1:50,000 sheet number, prospecting licence number (PL), data source and contains a url to download a PDF of the borehole log.

Bedrock is the solid rock at or below the land surface. Over much of Ireland, the bedrock is covered by materials such as soil and gravel. The Bedrock map shows what the land surface of Ireland would be made up of if these materials were removed. As the bedrock is commonly covered, bedrock maps are an interpretation of the available data. Geologists map and record information on the composition and structure of rock outcrops (rock which can be seen on the land surface) and boreholes (a deep narrow round hole drilled in the ground). Areas are drawn on a map to show the distribution of rocks. To produce this dataset, the Geological Survey Ireland (GSI) bedrock geology 1:100,000 maps were generalised. The Northern Irish data was generalised using the Geological Survey of Northern Ireland (GSNI) 1:250,000 bedrock geology map.This map is to the scale 1:500,000. This means it should be viewed at that scale. When printed at that scale 1cm on the map relates to a distance of 5km.It is a vector dataset. Vector data portray the world using points, lines, and polygons (areas).The bedrock data is shown as polygons. Each polygon holds information on the rock unit name, age and there is a link to download a pdf of the age description.The faults show the details of the structural geology. Faults are the result of great pressure being applied to rock across a whole continent or more. These rocks will break under the pressure, forming faults. Faults are recorded as lines where the break in the rock meets the surface. To produce this dataset, the Geological Survey Ireland (GSI) bedrock geology 1:100,000 faults were generalised. The Northern Irish data was generalised using the Geological Survey of Northern Ireland (GSNI) 1:250,000 bedrock geology faults map.This map is to the scale 1:500,000. This means it should be viewed at that scale. When printed at that scale 1cm on the map relates to a distance of 5km.It is a vector dataset. Vector data portray the world using points, lines, and polygons (areas).The faults data is shown as black lines. Each line holds information on the fault name if one exists.The dykes show the details of the structural geology. A dyke is a flat body of rock that cuts through another type of rock. Dykes cut across the other type of rock at a different angle than the rest of the structure. Dykes are usually visible because they are at a different angle, and usually have different color and texture than the rock surrounding them.To produce this dataset, the Geological Survey Ireland (GSI) bedrock geology 1:100,000 dykes were generalised. The Northern Irish data was generalised using the Geological Survey of Northern Ireland (GSNI) 1:250,000 bedrock geology faults map.This map is to the scale 1:500,000. This means it should be viewed at that scale. When printed at that scale 1cm on the map relates to a distance of 5km.It is a vector dataset. Vector data portray the world using points, lines, and polygons (areas).The dykes data is shown as red lines.

Bedrock is the solid rock at or below the land surface. Over much of Ireland, the bedrock is covered by materials such as soil and gravel. The Bedrock map shows what the land surface of Ireland would be made up of if these materials were removed. As the bedrock is commonly covered, bedrock maps are an interpretation of the available data. Geologists map and record information on the composition and structure of rock outcrops (rock which can be seen on the land surface) and boreholes (a deep narrow round hole drilled in the ground). Areas are drawn on a map to show the distribution of rocks. The Geological Lines layer shows the details of the structural geology; faults, folds and unconformities. Faults and folds are the result of great pressure being applied to rock across a whole continent or more. These rocks will either break under the pressure, forming faults, or they will bend to form folds. Faults are recorded in the Geological Lines layer as lines where the break in the rock meets the surface. Folds are shown only using the lines of their axes, synclinal (where the rock folds downwards) and anticlinal (where the rock folds upwards). Unconformities are where there is a gap in the rock record, typically where rock has been eroded away in the past and a new rock deposited on top.Geologists map and record information on the structural geology. Lines are drawn on a map to show the location and extent of these structures. The structural symbols layer is used to describe the geology of an area through dip and strike information. Dip and strike describe the behaviour of the rock bedding plane. To describe a geometric plane two values are required; the angle from horizontal that it is dipping and the direction that it is dipping. Geologists describe the dip direction by the strike value; this is the azimuth perpendicular to the steepest dip of the plane.The measurements that this layer contains give information about the geometry of the rock units under the ground. These measurements are the only way to see if the rocks are folded and faulted and how. With this information we can also start to see why the rocks have the shapes that they do.To produce this dataset, the twenty one 1:100,000 paper maps covering Ireland were digitised and borders and overlaps between map sheets were removed. We collect new data to update our map and also use data made available from other sources. This map is to the scale 1:100,000. This means it should be viewed at that scale. When printed at that scale 1cm on the map relates to a distance of 1km.It is a vector dataset. Vector data portray the world using points, lines, and polygons (areas).The bedrock data is shown as polygons. Each polygon holds information on the rock unit name, its description, stratigraphy code (rock layers with age profile), lithology code (rock type) and map sheet number. Each polygon is linked to the bedrock lexicon table which has more detailed information such as a definition of the rock unit, rock types, age, thickness and other comments.The geological line data is shown as lines. Each line holds information on: description of the line, bedrock 100k map sheet number, style and label information. Other information if relevant such as name, stratigraphy code (rock layers with age profile) & lithology code (rock type). Each line is linked to the bedrock linework lexicon table which has more detailed information such as a definition of the rock unit, rock types, age, thickness and other comments. The structural symbols data is shown as points. Each point holds information on: the dip angle and direction, the strike angle and a description.The outcrop data is shown as polygons.

Bedrock is the solid rock at or below the land surface. Over much of Ireland, the bedrock is covered by materials such as soil and gravel. The Bedrock map shows what the land surface of Ireland would be made up of if these materials were removed. As the bedrock is commonly covered, bedrock maps are an interpretation of the available data. Geologists map and record information on the composition and structure of rock outcrops (rock which can be seen on the land surface) and boreholes (a deep narrow round hole drilled in the ground). Areas are drawn on a map to show the distribution of rocks. The Geological Lines layer shows the details of the structural geology; faults, folds and unconformities. Faults and folds are the result of great pressure being applied to rock across a whole continent or more. These rocks will either break under the pressure, forming faults, or they will bend to form folds. Faults are recorded in the Geological Lines layer as lines where the break in the rock meets the surface. Folds are shown only using the lines of their axes, synclinal (where the rock folds downwards) and anticlinal (where the rock folds upwards). Unconformities are where there is a gap in the rock record, typically where rock has been eroded away in the past and a new rock deposited on top.Geologists map and record information on the structural geology. Lines are drawn on a map to show the location and extent of these structures. The structural symbols layer is used to describe the geology of an area through dip and strike information. Dip and strike describe the behaviour of the rock bedding plane. To describe a geometric plane two values are required; the angle from horizontal that it is dipping and the direction that it is dipping. Geologists describe the dip direction by the strike value; this is the azimuth perpendicular to the steepest dip of the plane.The measurements that this layer contains give information about the geometry of the rock units under the ground. These measurements are the only way to see if the rocks are folded and faulted and how. With this information we can also start to see why the rocks have the shapes that they do.To produce this dataset, the twenty one 1:100,000 paper maps covering Ireland were digitised and borders and overlaps between map sheets were removed. We collect new data to update our map and also use data made available from other sources. This map is to the scale 1:100,000. This means it should be viewed at that scale. When printed at that scale 1cm on the map relates to a distance of 1km.It is a vector dataset. Vector data portray the world using points, lines, and polygons (areas).The bedrock data is shown as polygons. Each polygon holds information on the rock unit name, its description, stratigraphy code (rock layers with age profile), lithology code (rock type) and map sheet number. Each polygon is linked to the bedrock lexicon table which has more detailed information such as a definition of the rock unit, rock types, age, thickness and other comments.The geological line data is shown as lines. Each line holds information on: description of the line, bedrock 100k map sheet number, style and label information. Other information if relevant such as name, stratigraphy code (rock layers with age profile) & lithology code (rock type). Each line is linked to the bedrock linework lexicon table which has more detailed information such as a definition of the rock unit, rock types, age, thickness and other comments. The structural symbols data is shown as points. Each point holds information on: the dip angle and direction, the strike angle and a description.The outcrop data is shown as polygons.

Bedrock is the solid rock at or below the land surface. Over much of Ireland, the bedrock is covered by materials such as soil and gravel. The Bedrock map shows what the land surface of Ireland would be made up of if these materials were removed. As the bedrock is commonly covered, bedrock maps are an interpretation of the available data. Geologists map and record information on the composition and structure of rock outcrops (rock which can be seen on the land surface) and boreholes (a deep narrow round hole drilled in the ground). Areas are drawn on a map to show the distribution of rocks. The Geological Lines layer shows the details of the structural geology; faults, folds and unconformities. Faults and folds are the result of great pressure being applied to rock across a whole continent or more. These rocks will either break under the pressure, forming faults, or they will bend to form folds. Faults are recorded in the Geological Lines layer as lines where the break in the rock meets the surface. Folds are shown only using the lines of their axes, synclinal (where the rock folds downwards) and anticlinal (where the rock folds upwards). Unconformities are where there is a gap in the rock record, typically where rock has been eroded away in the past and a new rock deposited on top.Geologists map and record information on the structural geology. Lines are drawn on a map to show the location and extent of these structures. The structural symbols layer is used to describe the geology of an area through dip and strike information. Dip and strike describe the behaviour of the rock bedding plane. To describe a geometric plane two values are required; the angle from horizontal that it is dipping and the direction that it is dipping. Geologists describe the dip direction by the strike value; this is the azimuth perpendicular to the steepest dip of the plane.The measurements that this layer contains give information about the geometry of the rock units under the ground. These measurements are the only way to see if the rocks are folded and faulted and how. With this information we can also start to see why the rocks have the shapes that they do.To produce this dataset, the twenty one 1:100,000 paper maps covering Ireland were digitised and borders and overlaps between map sheets were removed. We collect new data to update our map and also use data made available from other sources. This map is to the scale 1:100,000. This means it should be viewed at that scale. When printed at that scale 1cm on the map relates to a distance of 1km.It is a vector dataset. Vector data portray the world using points, lines, and polygons (areas).The bedrock data is shown as polygons. Each polygon holds information on the rock unit name, its description, stratigraphy code (rock layers with age profile), lithology code (rock type) and map sheet number. Each polygon is linked to the bedrock lexicon table which has more detailed information such as a definition of the rock unit, rock types, age, thickness and other comments.The geological line data is shown as lines. Each line holds information on: description of the line, bedrock 100k map sheet number, style and label information. Other information if relevant such as name, stratigraphy code (rock layers with age profile) & lithology code (rock type). Each line is linked to the bedrock linework lexicon table which has more detailed information such as a definition of the rock unit, rock types, age, thickness and other comments. The structural symbols data is shown as points. Each point holds information on: the dip angle and direction, the strike angle and a description.The outcrop data is shown as polygons.

Bedrock is the solid rock at or below the land surface. Over much of Ireland, the bedrock is covered by materials such as soil and gravel. The Bedrock map shows what the land surface of Ireland would be made up of if these materials were removed. As the bedrock is commonly covered, bedrock maps are an interpretation of the available data. Geologists map and record information on the composition and structure of rock outcrops (rock which can be seen on the land surface) and boreholes (a deep narrow round hole drilled in the ground). Areas are drawn on a map to show the distribution of rocks. The Geological Lines layer shows the details of the structural geology; faults, folds and unconformities. Faults and folds are the result of great pressure being applied to rock across a whole continent or more. These rocks will either break under the pressure, forming faults, or they will bend to form folds. Faults are recorded in the Geological Lines layer as lines where the break in the rock meets the surface. Folds are shown only using the lines of their axes, synclinal (where the rock folds downwards) and anticlinal (where the rock folds upwards). Unconformities are where there is a gap in the rock record, typically where rock has been eroded away in the past and a new rock deposited on top.Geologists map and record information on the structural geology. Lines are drawn on a map to show the location and extent of these structures. The structural symbols layer is used to describe the geology of an area through dip and strike information. Dip and strike describe the behaviour of the rock bedding plane. To describe a geometric plane two values are required; the angle from horizontal that it is dipping and the direction that it is dipping. Geologists describe the dip direction by the strike value; this is the azimuth perpendicular to the steepest dip of the plane.The measurements that this layer contains give information about the geometry of the rock units under the ground. These measurements are the only way to see if the rocks are folded and faulted and how. With this information we can also start to see why the rocks have the shapes that they do.To produce this dataset, the twenty one 1:100,000 paper maps covering Ireland were digitised and borders and overlaps between map sheets were removed. We collect new data to update our map and also use data made available from other sources. This map is to the scale 1:100,000. This means it should be viewed at that scale. When printed at that scale 1cm on the map relates to a distance of 1km.It is a vector dataset. Vector data portray the world using points, lines, and polygons (areas).The bedrock data is shown as polygons. Each polygon holds information on the rock unit name, its description, stratigraphy code (rock layers with age profile), lithology code (rock type) and map sheet number. Each polygon is linked to the bedrock lexicon table which has more detailed information such as a definition of the rock unit, rock types, age, thickness and other comments.The geological line data is shown as lines. Each line holds information on: description of the line, bedrock 100k map sheet number, style and label information. Other information if relevant such as name, stratigraphy code (rock layers with age profile) & lithology code (rock type). Each line is linked to the bedrock linework lexicon table which has more detailed information such as a definition of the rock unit, rock types, age, thickness and other comments. The structural symbols data is shown as points. Each point holds information on: the dip angle and direction, the strike angle and a description.The outcrop data is shown as polygons.

Bedrock is the solid rock at or below the land surface. Over much of Ireland, the bedrock is covered by materials such as soil and gravel. The Bedrock map shows what the land surface of Ireland would be made up of if these materials were removed. As the bedrock is commonly covered, bedrock maps are an interpretation of the available data. Geologists map and record information on the composition and structure of rock outcrops (rock which can be seen on the land surface) and boreholes (a deep narrow round hole drilled in the ground). Areas are drawn on a map to show the distribution of rocks. A borehole is any hole drilled or dug into the ground. The hole is usually deep, narrow and round. The material (soil and or rock) from the hole is collected and tested in a laboratory to find out the structure and type of the soil and or rock beneath the ground. A borehole record or log is a written description of the material that comes out of the ground as a result of drilling a borehole. Bedrock boreholes are usually deep (can reach up to 1000m). We drill boreholes to improve and update our bedrock, quaternary sediments and groundwater maps. We store the samples (core) and these are available to view by appointment. We’re in the process of scanning all the core and the images will be available online when completed. The Geological Lines layer shows the details of the structural geology; faults, folds and unconformities. Faults and folds are the result of great pressure being applied to rock across a whole continent or more. These rocks will either break under the pressure, forming faults, or they will bend to form folds. Faults are recorded in the Geological Lines layer as lines where the break in the rock meets the surface. Folds are shown only using the lines of their axes, synclinal (where the rock folds downwards) and anticlinal (where the rock folds upwards). Unconformities are where there is a gap in the rock record, typically where rock has been eroded away in the past and a new rock deposited on top.Geologists map and record information on the structural geology. Lines are drawn on a map to show the location and extent of these structures. The structural symbols layer is used to describe the geology of an area through dip and strike information. Dip and strike describe the behaviour of the rock bedding plane. To describe a geometric plane two values are required; the angle from horizontal that it is dipping and the direction that it is dipping. Geologists describe the dip direction by the strike value; this is the azimuth perpendicular to the steepest dip of the plane.The measurements that this layer contains give information about the geometry of the rock units under the ground. These measurements are the only way to see if the rocks are folded and faulted and how. With this information we can also start to see why the rocks have the shapes that they do.To produce this dataset, the bedrock geology 1:100,000 map was clipped to the Cork GeoUrban Area. Historical information was compiled from mineral exploration reports and old geology maps. This new information was used to re-interpret the geology.This map is to the scale 1:50,000. This means it should be viewed at that scale. When printed at that scale 1cm on the map relates to a distance of 500 m.It is a vector dataset. Vector data portray the world using points, lines, and polygons (areas).The bedrock data is shown as polygons. Each polygon holds information on the rock unit name, its description, stratigraphy code (rock layers with age profile), lithology code (rock type) and map sheet number. Each polygon is linked to the bedrock lexicon table which has more detailed information such as a definition of the rock unit, rock types, age, thickness and other comments.The geological line data is shown as lines. Each line holds information on: description of the line, bedrock 100k map sheet number, style and label information. Other information if relevant such as name, stratigraphy code (rock layers with age profile) & lithology code (rock type). Each line is linked to the bedrock linework lexicon table which has more detailed information such as a definition of the rock unit, rock types, age, thickness and other comments. The structural symbols data is shown as points. Each point holds information on: the dip angle and direction, the strike angle and a description.The outcrop data is shown as polygons. The borehole data is shown as points. Each point holds information on the location of the borehole (X and Y coordinates), Borehole ID (borehole identifier), the length of the hole (metres), the angle the hole was drilled, azimuth (direction the hole was drilled), comments, county, 1:50,000 sheet number, prospecting licence number (PL), data source and contains a url to download a PDF of the borehole log.

Bedrock is the solid rock at or below the land surface. Over much of Ireland, the bedrock is covered by materials such as soil and gravel. The Bedrock map shows what the land surface of Ireland would be made up of if these materials were removed. As the bedrock is commonly covered, bedrock maps are an interpretation of the available data. Geologists map and record information on the composition and structure of rock outcrops (rock which can be seen on the land surface) and boreholes (a deep narrow round hole drilled in the ground). Areas are drawn on a map to show the distribution of rocks. A borehole is any hole drilled or dug into the ground. The hole is usually deep, narrow and round. The material (soil and or rock) from the hole is collected and tested in a laboratory to find out the structure and type of the soil and or rock beneath the ground. A borehole record or log is a written description of the material that comes out of the ground as a result of drilling a borehole. Bedrock boreholes are usually deep (can reach up to 1000m). We drill boreholes to improve and update our bedrock, quaternary sediments and groundwater maps. We store the samples (core) and these are available to view by appointment. We’re in the process of scanning all the core and the images will be available online when completed. The Geological Lines layer shows the details of the structural geology; faults, folds and unconformities. Faults and folds are the result of great pressure being applied to rock across a whole continent or more. These rocks will either break under the pressure, forming faults, or they will bend to form folds. Faults are recorded in the Geological Lines layer as lines where the break in the rock meets the surface. Folds are shown only using the lines of their axes, synclinal (where the rock folds downwards) and anticlinal (where the rock folds upwards). Unconformities are where there is a gap in the rock record, typically where rock has been eroded away in the past and a new rock deposited on top.Geologists map and record information on the structural geology. Lines are drawn on a map to show the location and extent of these structures. The structural symbols layer is used to describe the geology of an area through dip and strike information. Dip and strike describe the behaviour of the rock bedding plane. To describe a geometric plane two values are required; the angle from horizontal that it is dipping and the direction that it is dipping. Geologists describe the dip direction by the strike value; this is the azimuth perpendicular to the steepest dip of the plane.The measurements that this layer contains give information about the geometry of the rock units under the ground. These measurements are the only way to see if the rocks are folded and faulted and how. With this information we can also start to see why the rocks have the shapes that they do.To produce this dataset, the bedrock geology 1:100,000 map was clipped to the North Midlands Area. Historical information was compiled from mineral exploration reports and old geology maps. This new information was used to re-interpret the geology.Bedrock maps show the area of certain rock types, but more importantly, they also show the age of the rocks. One of the key ways that the age of a rock can be determined is by examining the microfossils that the rocks contain. Historical study of microfossils has shown the order in which microfossils appear in rocks, which can be used to give the age of the rocks themselves.The Palaeontology layers shows the position where fossils have been seen by geologists in thin sections from samples taken in the field and in boreholes, and is linked to a table describing the details of the fossils that were seen.The position of the fossils was taken from fieldwork and drilling carried out by GSI geologists, recently and historically, and from mineral exploration reports. This map is to the scale 1:50,000. This means it should be viewed at that scale. When printed at that scale 1cm on the map relates to a distance of 500 m.It is a vector dataset. Vector data portray the world using points, lines, and polygons (areas).The bedrock data is shown as polygons. Each polygon holds information on the rock unit name, its description, stratigraphy code (rock layers with age profile), lithology code (rock type) and map sheet number. Each polygon is linked to the bedrock lexicon table which has more detailed information such as a definition of the rock unit, rock types, age, thickness and other comments.The geological line data is shown as lines. Each line holds information on: description of the line, bedrock 100k map sheet number, style and label information. Other information if relevant such as name, stratigraphy code (rock layers with age profile) & lithology code (rock type). Each line is linked to the bedrock linework lexicon table which has more detailed information such as a definition of the rock unit, rock types, age, thickness and other comments. The structural symbols data is shown as points. Each point holds information on: the dip angle and direction, the strike angle and a description.The outcrop data is shown as polygons. The borehole data is shown as points. Each point holds information on the location of the borehole (X and Y coordinates), Borehole ID (borehole identifier), the length of the hole (metres), the angle the hole was drilled, azimuth (direction the hole was drilled), comments, county, 1:50,000 sheet number, prospecting licence number (PL), data source and contains a url to download a PDF of the borehole log.The palaeontology data is shown as points. Each point holds information on: the location of the fossil (X & Y), the townland or borehole where it was seen, the source of the data and the fossils within.

Bedrock is the solid rock at or below the land surface. Over much of Ireland, the bedrock is covered by materials such as soil and gravel. The Bedrock map shows what the land surface of Ireland would be made up of if these materials were removed. As the bedrock is commonly covered, bedrock maps are an interpretation of the available data. Geologists map and record information on the composition and structure of rock outcrops (rock which can be seen on the land surface) and boreholes (a deep narrow round hole drilled in the ground). Areas are drawn on a map to show the distribution of rocks. To produce this dataset, the Geological Survey Ireland (GSI) bedrock geology 1:100,000 maps were generalised. The Northern Irish data was generalised using the Geological Survey of Northern Ireland (GSNI) 1:250,000 bedrock geology map.This map is to the scale 1:500,000. This means it should be viewed at that scale. When printed at that scale 1cm on the map relates to a distance of 5km.It is a vector dataset. Vector data portray the world using points, lines, and polygons (areas).The bedrock data is shown as polygons. Each polygon holds information on the rock unit name, age and there is a link to download a pdf of the age description.The faults show the details of the structural geology. Faults are the result of great pressure being applied to rock across a whole continent or more. These rocks will break under the pressure, forming faults. Faults are recorded as lines where the break in the rock meets the surface. To produce this dataset, the Geological Survey Ireland (GSI) bedrock geology 1:100,000 faults were generalised. The Northern Irish data was generalised using the Geological Survey of Northern Ireland (GSNI) 1:250,000 bedrock geology faults map.This map is to the scale 1:500,000. This means it should be viewed at that scale. When printed at that scale 1cm on the map relates to a distance of 5km.It is a vector dataset. Vector data portray the world using points, lines, and polygons (areas).The faults data is shown as black lines. Each line holds information on the fault name if one exists.The dykes show the details of the structural geology. A dyke is a flat body of rock that cuts through another type of rock. Dykes cut across the other type of rock at a different angle than the rest of the structure. Dykes are usually visible because they are at a different angle, and usually have different color and texture than the rock surrounding them.To produce this dataset, the Geological Survey Ireland (GSI) bedrock geology 1:100,000 dykes were generalised. The Northern Irish data was generalised using the Geological Survey of Northern Ireland (GSNI) 1:250,000 bedrock geology faults map.This map is to the scale 1:500,000. This means it should be viewed at that scale. When printed at that scale 1cm on the map relates to a distance of 5km.It is a vector dataset. Vector data portray the world using points, lines, and polygons (areas).The dykes data is shown as red lines.

Bedrock is the solid rock at or below the land surface. Over much of Ireland, the bedrock is covered by materials such as soil and gravel. The Bedrock map shows what the land surface of Ireland would be made up of if these materials were removed. As the bedrock is commonly covered, bedrock maps are an interpretation of the available data. Geologists map and record information on the composition and structure of rock outcrops (rock which can be seen on the land surface) and boreholes (a deep narrow round hole drilled in the ground). Areas are drawn on a map to show the distribution of rocks. To produce this dataset, the Geological Survey Ireland (GSI) bedrock geology 1:100,000 maps were generalised. The Northern Irish data was generalised using the Geological Survey of Northern Ireland (GSNI) 1:250,000 bedrock geology map.This map is to the scale 1:500,000. This means it should be viewed at that scale. When printed at that scale 1cm on the map relates to a distance of 5km.It is a vector dataset. Vector data portray the world using points, lines, and polygons (areas).The bedrock data is shown as polygons. Each polygon holds information on the rock unit name, age and there is a link to download a pdf of the age description.The faults show the details of the structural geology. Faults are the result of great pressure being applied to rock across a whole continent or more. These rocks will break under the pressure, forming faults. Faults are recorded as lines where the break in the rock meets the surface. To produce this dataset, the Geological Survey Ireland (GSI) bedrock geology 1:100,000 faults were generalised. The Northern Irish data was generalised using the Geological Survey of Northern Ireland (GSNI) 1:250,000 bedrock geology faults map.This map is to the scale 1:500,000. This means it should be viewed at that scale. When printed at that scale 1cm on the map relates to a distance of 5km.It is a vector dataset. Vector data portray the world using points, lines, and polygons (areas).The faults data is shown as black lines. Each line holds information on the fault name if one exists.The dykes show the details of the structural geology. A dyke is a flat body of rock that cuts through another type of rock. Dykes cut across the other type of rock at a different angle than the rest of the structure. Dykes are usually visible because they are at a different angle, and usually have different color and texture than the rock surrounding them.To produce this dataset, the Geological Survey Ireland (GSI) bedrock geology 1:100,000 dykes were generalised. The Northern Irish data was generalised using the Geological Survey of Northern Ireland (GSNI) 1:250,000 bedrock geology faults map.This map is to the scale 1:500,000. This means it should be viewed at that scale. When printed at that scale 1cm on the map relates to a distance of 5km.It is a vector dataset. Vector data portray the world using points, lines, and polygons (areas).The dykes data is shown as red lines.