Africa Groundwater Atlas Hydrogeology Maps - Revision history

LaurenGiles: /* References */ surficial geology of africa link removed

2024-01-23T12:20:36Z

References: surficial geology of africa link removed

← Older revision		Revision as of 13:20, 23 January 2024
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	==References==		==References==

	Furon R and Lombard J. 1964. [~~http~~://unesdoc.unesco.org/images/0009/000920/092086mo.pdf Explanatory note: Geological Map of Africa (1/5,000,000) / Note explicative: carte geologique de l'Afrique (1/5,000,000)]. UNESCO and the Association for African Geological Surveys (ASGA). UNESCO, Paris, 1964.		Furon R and Lombard J. 1964. [https://unesdoc.unesco.org/images/0009/000920/092086mo.pdf Explanatory note: Geological Map of Africa (1/5,000,000) / Note explicative: carte geologique de l'Afrique (1/5,000,000)]. UNESCO and the Association for African Geological Surveys (ASGA). UNESCO, Paris, 1964.

	MacDonald AM and Davies J. 2000. [~~http~~://nora.nerc.ac.uk/501047/ A brief review of groundwater for rural water supply in sub-Saharan Africa]. British Geological Survey Technical Report, WC/00/033, 30pp.		MacDonald AM and Davies J. 2000. [https://nora.nerc.ac.uk/501047/ A brief review of groundwater for rural water supply in sub-Saharan Africa]. British Geological Survey Technical Report, WC/00/033, 30pp.

	MacDonald AM, Bonsor HC, Ó Dochartaigh BÉ and Taylor RG. 2012. [~~http~~://nora.nerc.ac.uk/17892/ Quantitative maps of groundwater resources in Africa]. Environmental Research Letters, Vol. 7(2). doi:10.1088/1748-9326/7/2/024009		MacDonald AM, Bonsor HC, Ó Dochartaigh BÉ and Taylor RG. 2012. [https://nora.nerc.ac.uk/17892/ Quantitative maps of groundwater resources in Africa]. Environmental Research Letters, Vol. 7(2). doi:10.1088/1748-9326/7/2/024009

	MacDonald AM, Ó Dochartaigh BÉ, Bonsor HC, Davies J, and Key R. 2010. [~~http~~://nora.nerc.ac.uk/501779/ Developing quantitative aquifer maps for Africa]. British Geological Survey Internal Report, IR/10/103.		MacDonald AM, Ó Dochartaigh BÉ, Bonsor HC, Davies J, and Key R. 2010. [https://nora.nerc.ac.uk/501779/ Developing quantitative aquifer maps for Africa]. British Geological Survey Internal Report, IR/10/103.

	Ó Dochartaigh, BÉ. 2021. [~~http~~://nora.nerc.ac.uk/id/eprint/531584/ User Guide Version 1.2: Africa Groundwater Atlas Country Hydrogeology Maps]. British Geological Survey Open Report OR/21/063.		Ó Dochartaigh, BÉ. 2021. [https://nora.nerc.ac.uk/id/eprint/531584/ User Guide Version 1.2: Africa Groundwater Atlas Country Hydrogeology Maps]. British Geological Survey Open Report OR/21/063.

	Persits F, Ahlbrandt T, Tuttle M, Charpentier R, Brownfield M, and Takahashi K. 1997. [~~http~~://pubs.usgs.gov/of/1997/ofr-97-470/OF97-470A/ Map showing geology, oil and gas fields and geologic provinces of Africa, Ver 2.0]. USGS Open File report 97-470 A.		Persits F, Ahlbrandt T, Tuttle M, Charpentier R, Brownfield M, and Takahashi K. 1997. [https://pubs.usgs.gov/of/1997/ofr-97-470/OF97-470A/ Map showing geology, oil and gas fields and geologic provinces of Africa, Ver 2.0]. USGS Open File report 97-470 A.

	USGS. 2002. ~~[https://certmapper.cr.usgs.gov/geoportal/catalog/search/resource/details.page?uuid=%7BC7E34C48-9BD9-45C6-AD08-E549CFB3715A%7D~~ Surficial geology of Africa (geo7_2ag)]. Shapefile for download. Accessed 11 March 2019.		USGS. 2002. Surficial geology of Africa (geo7_2ag). Shapefile for download. Accessed 11 March 2019.

	See also the [https://www2.bgs.ac.uk/groundwater/international/africangroundwater/maps.html '''BGS Quantitative groundwater maps for Africa'''] project webpage.		See also the [https://www2.bgs.ac.uk/groundwater/international/africangroundwater/maps.html '''BGS Quantitative groundwater maps for Africa'''] project webpage.

LaurenGiles: /* Aquifer Type */ typo in consolidated sedimentary karst row 'intergrangular'

2023-11-27T11:48:05Z

Aquifer Type: typo in consolidated sedimentary karst row 'intergrangular'

← Older revision		Revision as of 12:48, 27 November 2023
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	\|Consolidated Sedimentary Intergranular/Fracture		\|Consolidated Sedimentary Intergranular/Fracture
	\|\|Aquifers with significant intergranular storage, with mixed intergranular and fracture flow. The average porosity of rocks is approximately 0.1 – 0.25.		\|\|Aquifers with significant intergranular storage, with mixed intergranular and fracture flow. The average porosity of rocks is approximately 0.1 – 0.25.
	\|\|Older sedimentary rocks (e.g. older Mesozoic and Palaeozoic), which tend to be well consolidated with low ~~intergrangular~~ permeability.		\|\|Older sedimentary rocks (e.g. older Mesozoic and Palaeozoic), which tend to be well consolidated with low intergranular permeability.
	\|-		\|-
	\|Consolidated Sedimentary Karst (sometimes also Consolidated Sedimentary Fracture Karst or Consolidated Sedimentary Intergranular Fracture Karst)		\|Consolidated Sedimentary Karst (sometimes also Consolidated Sedimentary Fracture Karst or Consolidated Sedimentary Intergranular Fracture Karst)
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	[[File:AfricaFlowStorage.png \| thumb\| 400px\|center\| Aquifer flow and storage type across Africa]]		[[File:AfricaFlowStorage.png \| thumb\| 400px\|center\| Aquifer flow and storage type across Africa]]


	====Aquifer productivity====		====Aquifer productivity====

Beod: /* The Africa Groundwater Atlas Country Hydrogeology Maps */

2022-03-03T14:07:35Z

The Africa Groundwater Atlas Country Hydrogeology Maps

← Older revision		Revision as of 15:07, 3 March 2022
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	==The Africa Groundwater Atlas Country Hydrogeology Maps==		==The Africa Groundwater Atlas Country Hydrogeology Maps==

	The country hydrogeology maps in this Atlas provide an overview of the hydrogeology and geology of each of 48 countries in Africa, at 1:5 million scale.		The country hydrogeology maps in this Atlas provide an overview of the hydrogeology and geology of each of 48 countries in Africa, at 1:5 million scale.

	Most of these maps (currently for 38 countries) are available to [https://www.bgs.ac.uk/africagroundwateratlas/downloadGIS.html '''download as digital, GIS-enabled shapefiles'''].		Most of these maps (currently for 38 countries) are available to [https://www.bgs.ac.uk/africagroundwateratlas/downloadGIS.html '''download as digital, GIS-enabled shapefiles'''].

Beod at 14:18, 16 December 2021

2021-12-16T14:18:34Z

← Older revision		Revision as of 15:18, 16 December 2021
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	For more information see [https://creativecommons.org/licenses/by-sa/4.0/ Creative Commons ‘Attribution/Share Alike’ (CC BY SA)].		For more information see [https://creativecommons.org/licenses/by-sa/4.0/ Creative Commons ‘Attribution/Share Alike’ (CC BY SA)].

	See also the ~~maps~~ User Guide ([http://nora.nerc.ac.uk/id/eprint/~~523272~~/ Ó Dochartaigh, ~~2019~~]).		See also the User Guide ([http://nora.nerc.ac.uk/id/eprint/531584/ Ó Dochartaigh, 2021]) for the maps.

	==References==		==References==
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	MacDonald AM, Ó Dochartaigh BÉ, Bonsor HC, Davies J, and Key R. 2010. [http://nora.nerc.ac.uk/501779/ Developing quantitative aquifer maps for Africa]. British Geological Survey Internal Report, IR/10/103.		MacDonald AM, Ó Dochartaigh BÉ, Bonsor HC, Davies J, and Key R. 2010. [http://nora.nerc.ac.uk/501779/ Developing quantitative aquifer maps for Africa]. British Geological Survey Internal Report, IR/10/103.

	Ó Dochartaigh, BÉ. ~~2019~~. [http://nora.nerc.ac.uk/id/eprint/~~523272~~/ User Guide : Africa ~~groundwater atlas country hydrogeology maps, version 1.1~~]. British Geological Survey Open Report OR/19/~~035~~.		Ó Dochartaigh, BÉ. 2021. [http://nora.nerc.ac.uk/id/eprint/531584/ User Guide Version 1.2: Africa Groundwater Atlas Country Hydrogeology Maps]. British Geological Survey Open Report OR/21/063.

	Persits F, Ahlbrandt T, Tuttle M, Charpentier R, Brownfield M, and Takahashi K. 1997. [http://pubs.usgs.gov/of/1997/ofr-97-470/OF97-470A/ Map showing geology, oil and gas fields and geologic provinces of Africa, Ver 2.0]. USGS Open File report 97-470 A.		Persits F, Ahlbrandt T, Tuttle M, Charpentier R, Brownfield M, and Takahashi K. 1997. [http://pubs.usgs.gov/of/1997/ofr-97-470/OF97-470A/ Map showing geology, oil and gas fields and geologic provinces of Africa, Ver 2.0]. USGS Open File report 97-470 A.

Beod: /* How the Atlas country hydrogeology maps were developed */

2021-12-16T14:17:06Z

How the Atlas country hydrogeology maps were developed

← Older revision		Revision as of 15:17, 16 December 2021
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	Where possible, the maps have been validated in collaboration with hydrogeologists from the relevant countries who are co-authors on the relevant country pages of the Africa Groundwater Atlas (co-authors are referenced on the relevant Atlas country page and in the [http://earthwise.bgs.ac.uk/index.php/List_of_Authors List of Authors]).		Where possible, the maps have been validated in collaboration with hydrogeologists from the relevant countries who are co-authors on the relevant country pages of the Africa Groundwater Atlas (co-authors are referenced on the relevant Atlas country page and in the [http://earthwise.bgs.ac.uk/index.php/List_of_Authors List of Authors]).

	For more information see the ~~maps~~ User Guide ([http://nora.nerc.ac.uk/id/eprint/~~523272~~/ Ó Dochartaigh, ~~2019~~]).		For more information see the User Guide ([http://nora.nerc.ac.uk/id/eprint/531584/ Ó Dochartaigh, 2021] for the maps).

	==Limitations of the Atlas country hydrogeology maps==		==Limitations of the Atlas country hydrogeology maps==

Beod at 10:00, 14 December 2021

2021-12-14T10:00:25Z

← Older revision		Revision as of 11:00, 14 December 2021
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	USGS. 2002. [https://certmapper.cr.usgs.gov/geoportal/catalog/search/resource/details.page?uuid=%7BC7E34C48-9BD9-45C6-AD08-E549CFB3715A%7D Surficial geology of Africa (geo7_2ag)]. Shapefile for download. Accessed 11 March 2019.		USGS. 2002. [https://certmapper.cr.usgs.gov/geoportal/catalog/search/resource/details.page?uuid=%7BC7E34C48-9BD9-45C6-AD08-E549CFB3715A%7D Surficial geology of Africa (geo7_2ag)]. Shapefile for download. Accessed 11 March 2019.

	See also the [~~http~~://~~www~~.bgs.ac.uk~~/research~~/groundwater/international/africangroundwater/maps.html '''BGS Quantitative groundwater maps for Africa'''] project webpage.		See also the [https://www2.bgs.ac.uk/groundwater/international/africangroundwater/maps.html '''BGS Quantitative groundwater maps for Africa'''] project webpage.

Beod: /* How the Atlas country hydrogeology maps were developed */

2021-12-14T09:59:57Z

How the Atlas country hydrogeology maps were developed

← Older revision		Revision as of 10:59, 14 December 2021
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	The 1:5 million scale geology map was originally published by UNESCO (Furon and Lombard 1964), and was digitised by, and is made available through, the USGS (Persits et al., 1997). It can be accessed and downloaded in shapefile format via the USGS (details in References).		The 1:5 million scale geology map was originally published by UNESCO (Furon and Lombard 1964), and was digitised by, and is made available through, the USGS (Persits et al., 1997). It can be accessed and downloaded in shapefile format via the USGS (details in References).

	The country maps are a further development of the Africa-wide [~~http~~://~~www~~.bgs.ac.uk~~/research~~/groundwater/international/~~africanGroundwater~~/maps.html '''quantitative groundwater maps'''] that were produced by BGS in 2012 ([http://nora.nerc.ac.uk/id/eprint/17892/ MacDonald et al. 2012]). The country maps use the hydrogeological understanding captured in the Africa-wide maps, and incorporate additional geological and hydrogeological information from individual countries. They reflect current understanding of national geology and hydrogeology, given the scale of the geological base map linework and the availability of geological and hydrogeological information and, where possible, they reflect different national approaches to geological and hydrogeological categorisation.		The country maps are a further development of the Africa-wide [https://www2.bgs.ac.uk/groundwater/international/africangroundwater/maps.html '''quantitative groundwater maps'''] that were produced by BGS in 2012 ([http://nora.nerc.ac.uk/id/eprint/17892/ MacDonald et al. 2012]). The country maps use the hydrogeological understanding captured in the Africa-wide maps, and incorporate additional geological and hydrogeological information from individual countries. They reflect current understanding of national geology and hydrogeology, given the scale of the geological base map linework and the availability of geological and hydrogeological information and, where possible, they reflect different national approaches to geological and hydrogeological categorisation.

	Where possible, the maps have been validated in collaboration with hydrogeologists from the relevant countries who are co-authors on the relevant country pages of the Africa Groundwater Atlas (co-authors are referenced on the relevant Atlas country page and in the [http://earthwise.bgs.ac.uk/index.php/List_of_Authors List of Authors]).		Where possible, the maps have been validated in collaboration with hydrogeologists from the relevant countries who are co-authors on the relevant country pages of the Africa Groundwater Atlas (co-authors are referenced on the relevant Atlas country page and in the [http://earthwise.bgs.ac.uk/index.php/List_of_Authors List of Authors]).

	For more information see the maps User Guide ([http://nora.nerc.ac.uk/id/eprint/523272/ Ó Dochartaigh, 2019]).		For more information see the maps User Guide ([http://nora.nerc.ac.uk/id/eprint/523272/ Ó Dochartaigh, 2019]).

	==Limitations of the Atlas country hydrogeology maps==		==Limitations of the Atlas country hydrogeology maps==

Beod at 09:36, 14 December 2021

2021-12-14T09:36:05Z

← Older revision		Revision as of 10:36, 14 December 2021
Line 154:		Line 154:
	Where possible, the maps have been validated in collaboration with hydrogeologists from the relevant countries who are co-authors on the relevant country pages of the Africa Groundwater Atlas (co-authors are referenced on the relevant Atlas country page and in the [http://earthwise.bgs.ac.uk/index.php/List_of_Authors List of Authors]).		Where possible, the maps have been validated in collaboration with hydrogeologists from the relevant countries who are co-authors on the relevant country pages of the Africa Groundwater Atlas (co-authors are referenced on the relevant Atlas country page and in the [http://earthwise.bgs.ac.uk/index.php/List_of_Authors List of Authors]).

	===Limitations of the Atlas country hydrogeology maps===		For more information see the maps User Guide ([http://nora.nerc.ac.uk/id/eprint/523272/ Ó Dochartaigh, 2019]).

			==Limitations of the Atlas country hydrogeology maps==

	The Atlas country hydrogeology maps provide a national (country) scale overview of the hydrogeology and geology. They are not suitable for providing detailed information on geology and hydrogeology at a sub-national (e.g. catchment) scale. They are suitable for viewing at sizes from A2 down to A6, depending on the size of the country (see the section Map Scale, above).		The Atlas country hydrogeology maps provide a national (country) scale overview of the hydrogeology and geology. They are not suitable for providing detailed information on geology and hydrogeology at a sub-national (e.g. catchment) scale. They are suitable for viewing at sizes from A2 down to A6, depending on the size of the country (see the section Map Scale, above).
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	The maps do not necessarily show the same information as other hydrogeology or geology maps available for any country.		The maps do not necessarily show the same information as other hydrogeology or geology maps available for any country.

	===Licensing Information===		==Licensing Information==

	The maps are released under a [https://creativecommons.org/licenses/by-sa/4.0/ Creative Commons ‘Attribution/Share Alike’ (CC BY SA)] licence.		The maps are released under a [https://creativecommons.org/licenses/by-sa/4.0/ Creative Commons ‘Attribution/Share Alike’ (CC BY SA)] licence.

Beod at 09:34, 14 December 2021

2021-12-14T09:34:29Z

← Older revision		Revision as of 10:34, 14 December 2021
Line 154:		Line 154:
	Where possible, the maps have been validated in collaboration with hydrogeologists from the relevant countries who are co-authors on the relevant country pages of the Africa Groundwater Atlas (co-authors are referenced on the relevant Atlas country page and in the [http://earthwise.bgs.ac.uk/index.php/List_of_Authors List of Authors]).		Where possible, the maps have been validated in collaboration with hydrogeologists from the relevant countries who are co-authors on the relevant country pages of the Africa Groundwater Atlas (co-authors are referenced on the relevant Atlas country page and in the [http://earthwise.bgs.ac.uk/index.php/List_of_Authors List of Authors]).

	====Limitations of the Atlas country hydrogeology maps====		===Limitations of the Atlas country hydrogeology maps===

	The Atlas country hydrogeology maps provide a national (country) scale overview of the hydrogeology and geology. They are not suitable for providing detailed information on geology and hydrogeology at a sub-national (e.g. catchment) scale. They are suitable for viewing at sizes from A2 down to A6, depending on the size of the country (see the section Map Scale, above).		The Atlas country hydrogeology maps provide a national (country) scale overview of the hydrogeology and geology. They are not suitable for providing detailed information on geology and hydrogeology at a sub-national (e.g. catchment) scale. They are suitable for viewing at sizes from A2 down to A6, depending on the size of the country (see the section Map Scale, above).
Line 166:		Line 166:
	The maps do not necessarily show the same information as other hydrogeology or geology maps available for any country.		The maps do not necessarily show the same information as other hydrogeology or geology maps available for any country.

	==~~More~~ Information==		===Licensing Information===

			The maps are released under a [https://creativecommons.org/licenses/by-sa/4.0/ Creative Commons ‘Attribution/Share Alike’ (CC BY SA)] licence.

			Under this licence, users are free to:

			* Share – copy and redistribute the maps in any medium or format; and
			* Adapt – remix, transform, and build upon the maps for any purpose, even commercially.

			Please give appropriate credit if sharing the maps or any adaptation of them, to:
			* British Geological Survey. 2019/2021. Africa Groundwater Atlas Country Hydrogeology Maps. [https://www2.bgs.ac.uk/africagroundwateratlas/index.cfm Africa Groundwater Atlas].

			Please also provide a link to the CC BY SA license, and indicate if changes were made.
			For more information see [https://creativecommons.org/licenses/by-sa/4.0/ Creative Commons ‘Attribution/Share Alike’ (CC BY SA)].

			See also the maps User Guide ([http://nora.nerc.ac.uk/id/eprint/523272/ Ó Dochartaigh, 2019]).

			==References==

	Furon R and Lombard J. 1964. [http://unesdoc.unesco.org/images/0009/000920/092086mo.pdf Explanatory note: Geological Map of Africa (1/5,000,000) / Note explicative: carte geologique de l'Afrique (1/5,000,000)]. UNESCO and the Association for African Geological Surveys (ASGA). UNESCO, Paris, 1964.		Furon R and Lombard J. 1964. [http://unesdoc.unesco.org/images/0009/000920/092086mo.pdf Explanatory note: Geological Map of Africa (1/5,000,000) / Note explicative: carte geologique de l'Afrique (1/5,000,000)]. UNESCO and the Association for African Geological Surveys (ASGA). UNESCO, Paris, 1964.

	MacDonald AM, and Davies J. 2000. [http://nora.nerc.ac.uk/501047/ A brief review of groundwater for rural water supply in sub-Saharan Africa]. British Geological Survey Technical Report, WC/00/033, 30pp.		MacDonald AM and Davies J. 2000. [http://nora.nerc.ac.uk/501047/ A brief review of groundwater for rural water supply in sub-Saharan Africa]. British Geological Survey Technical Report, WC/00/033, 30pp.

	MacDonald AM, Bonsor HC, Ó Dochartaigh BÉ and Taylor RG. 2012. [http://nora.nerc.ac.uk/17892/ Quantitative maps of groundwater resources in Africa]. Environmental Research Letters, Vol. 7(2). doi:10.1088/1748-9326/7/2/024009		MacDonald AM, Bonsor HC, Ó Dochartaigh BÉ and Taylor RG. 2012. [http://nora.nerc.ac.uk/17892/ Quantitative maps of groundwater resources in Africa]. Environmental Research Letters, Vol. 7(2). doi:10.1088/1748-9326/7/2/024009

	MacDonald AM, Ó Dochartaigh BÉ, Bonsor HC, Davies J, and Key R. 2010. [http://nora.nerc.ac.uk/501779/ Developing quantitative aquifer maps for Africa]. British Geological Survey Internal Report, IR/10/103.		MacDonald AM, Ó Dochartaigh BÉ, Bonsor HC, Davies J, and Key R. 2010. [http://nora.nerc.ac.uk/501779/ Developing quantitative aquifer maps for Africa]. British Geological Survey Internal Report, IR/10/103.

			Ó Dochartaigh, BÉ. 2019. [http://nora.nerc.ac.uk/id/eprint/523272/ User Guide : Africa groundwater atlas country hydrogeology maps, version 1.1]. British Geological Survey Open Report OR/19/035.

	Persits F, Ahlbrandt T, Tuttle M, Charpentier R, Brownfield M, and Takahashi K. 1997. [http://pubs.usgs.gov/of/1997/ofr-97-470/OF97-470A/ Map showing geology, oil and gas fields and geologic provinces of Africa, Ver 2.0]. USGS Open File report 97-470 A.		Persits F, Ahlbrandt T, Tuttle M, Charpentier R, Brownfield M, and Takahashi K. 1997. [http://pubs.usgs.gov/of/1997/ofr-97-470/OF97-470A/ Map showing geology, oil and gas fields and geologic provinces of Africa, Ver 2.0]. USGS Open File report 97-470 A.

Beod: /* How the Atlas country hydrogeology maps were developed */

2021-10-01T09:01:15Z

How the Atlas country hydrogeology maps were developed

← Older revision		Revision as of 10:01, 1 October 2021
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	The Atlas country hydrogeology maps were developed in ArcGIS by modifying and attributing a digital Africa-wide geology map at 1:5 million scale, using available hydrogeological and geological information.		The Atlas country hydrogeology maps were developed in ArcGIS by modifying and attributing a digital Africa-wide geology map at 1:5 million scale, using available hydrogeological and geological information.

	The 1:5 million scale geology map was originally published by UNESCO (Furon and Lombard 1964), and was digitised by, and is made available through, the USGS (Persits et al., ~~2002~~). It can be accessed and downloaded in shapefile format via the USGS (details in References).		The 1:5 million scale geology map was originally published by UNESCO (Furon and Lombard 1964), and was digitised by, and is made available through, the USGS (Persits et al., 1997). It can be accessed and downloaded in shapefile format via the USGS (details in References).

	The country maps are a further development of the Africa-wide [http://www.bgs.ac.uk/research/groundwater/international/africanGroundwater/maps.html '''quantitative groundwater maps'''] that were produced by BGS in 2012 ([http://nora.nerc.ac.uk/id/eprint/17892/ MacDonald et al. 2012]). The country maps use the hydrogeological understanding captured in the Africa-wide maps, and incorporate additional geological and hydrogeological information from individual countries. They reflect current understanding of national geology and hydrogeology, given the scale of the geological base map linework and the availability of geological and hydrogeological information and, where possible, they reflect different national approaches to geological and hydrogeological categorisation.		The country maps are a further development of the Africa-wide [http://www.bgs.ac.uk/research/groundwater/international/africanGroundwater/maps.html '''quantitative groundwater maps'''] that were produced by BGS in 2012 ([http://nora.nerc.ac.uk/id/eprint/17892/ MacDonald et al. 2012]). The country maps use the hydrogeological understanding captured in the Africa-wide maps, and incorporate additional geological and hydrogeological information from individual countries. They reflect current understanding of national geology and hydrogeology, given the scale of the geological base map linework and the availability of geological and hydrogeological information and, where possible, they reflect different national approaches to geological and hydrogeological categorisation.
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	Because the maps reflect hydrogeological and geological terminology used in individual countries, the names and descriptions of hydrogeological or geological units that cross country (national) borders may not agree on both sides of the border (resulting in some country border ‘edges’ that have different colours/attribution).		Because the maps reflect hydrogeological and geological terminology used in individual countries, the names and descriptions of hydrogeological or geological units that cross country (national) borders may not agree on both sides of the border (resulting in some country border ‘edges’ that have different colours/attribution).

	The maps do not necessarily show the same information as other hydrogeology or geology maps available for any country.		The maps do not necessarily show the same information as other hydrogeology or geology maps available for any country.

	==More Information==		==More Information==