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   '''Lire cette page en français: [[Hydrogéologie de Madagascar | Hydrogéologie de Madagascar]]'''  [[File: flag_of_france.png  | 50px]]
 
   '''Lire cette page en français: [[Hydrogéologie de Madagascar | Hydrogéologie de Madagascar]]'''  [[File: flag_of_france.png  | 50px]]
  
[[File:CC-BY-SA_logo_88x31.png | frame | This work is licensed under a [https://creativecommons.org/licenses/by-sa/3.0/ Creative Commons Attribution-ShareAlike 3.0 Unported License]]]
 
  
 
Madagascar, an island nation off East Africa, has seen waves of settlers from southeast Asia, Africa and Arabia for at least possibly the past 2000 years, with many groups settling and some establishing trade posts. The population today is mostly Malagasy. Different groups of Malagasy people coexisted until the Merina people consolidated made it into a single kingdom in the 19th century. Many French settlers arrived in this period. The monarchy ended in 1897 when the island was fully colonised by France, from which it became independent in 1960. Since independence, Madagascar has seen many constitutional changes, most recently a coup in 2009, and new democratic elections in 2013.  
 
Madagascar, an island nation off East Africa, has seen waves of settlers from southeast Asia, Africa and Arabia for at least possibly the past 2000 years, with many groups settling and some establishing trade posts. The population today is mostly Malagasy. Different groups of Malagasy people coexisted until the Merina people consolidated made it into a single kingdom in the 19th century. Many French settlers arrived in this period. The monarchy ended in 1897 when the island was fully colonised by France, from which it became independent in 1960. Since independence, Madagascar has seen many constitutional changes, most recently a coup in 2009, and new democratic elections in 2013.  
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The geology map on this page shows a simplified version of the geology at a national scale (see the [[Geology | Geology resource page]] for more details).  
 
The geology map on this page shows a simplified version of the geology at a national scale (see the [[Geology | Geology resource page]] for more details).  
 
[https://www.bgs.ac.uk/africagroundwateratlas/downloadGIS.html '''Download a GIS shapefile of the Madagascar geology and hydrogeology map'''].
 
 
   
 
   
 
A higher resolution geological map of Madagascar is the '''Carte géologique de Madagascar, echelle 1:1,000,000'''. Scanned versions of this map in 3 tiles are available at the Bibliothèque et Archives Universitaires Cartotheque: [http://biblio.univ-antananarivo.mg/cartotheque/detail.php?id=341 Feuille du Nord], [http://biblio.univ-antananarivo.mg/cartotheque/detail.php?id=433 Feuille du Centre] et [http://biblio.univ-antananarivo.mg/cartotheque/detail.php?id=432  Feuille du Sud].  
 
A higher resolution geological map of Madagascar is the '''Carte géologique de Madagascar, echelle 1:1,000,000'''. Scanned versions of this map in 3 tiles are available at the Bibliothèque et Archives Universitaires Cartotheque: [http://biblio.univ-antananarivo.mg/cartotheque/detail.php?id=341 Feuille du Nord], [http://biblio.univ-antananarivo.mg/cartotheque/detail.php?id=433 Feuille du Centre] et [http://biblio.univ-antananarivo.mg/cartotheque/detail.php?id=432  Feuille du Sud].  
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[[File:Madagascar_Geology4.png | center | thumb| 400px | Geology of Madagascar at 1:5 million scale. Based on map described by Persits et al. 2002/Furon and Lombard 1964. For more information on the map development and datasets see the [[Geology | geology resource page]]. [https://www.bgs.ac.uk/africagroundwateratlas/downloadGIS.html Download a GIS shapefile of the Madagascar geology and hydrogeology map].]]
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[[File:Madagascar_Geology4.png | center | thumb| 400px | Geology of Madagascar at 1:5 million scale. Based on map described by Persits et al. 2002/Furon and Lombard 1964. For more information on the map development and datasets see the [[Geology | geology resource page]].]]
  
  
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The hydrogeology map below is an overview of aquifer type and productivity of the main aquifers, at a scale of 1:5,000,000 (see the [[Africa Groundwater Atlas Hydrogeology Maps | Hydrogeology map resource page]] for more details).  
 
The hydrogeology map below is an overview of aquifer type and productivity of the main aquifers, at a scale of 1:5,000,000 (see the [[Africa Groundwater Atlas Hydrogeology Maps | Hydrogeology map resource page]] for more details).  
 
[https://www.bgs.ac.uk/africagroundwateratlas/downloadGIS.html '''Download a GIS shapefile of the Madagascar geology and hydrogeology map'''].
 
  
 
A higher resolution hydrogeological map of Madagascar is available as part of the SADC hydrogeological map, at a scale of 1:2,500,000. It is available to view through the [https://ggis.un-igrac.org/ggis-viewer/viewer/sadcgip/public/default SADC Groundwater Information Portal]. More information on the map is in the [https://www.un-igrac.org/file/1239/download?token=9db4evoo SADC Hydrogeological Map and Atlas Brochure] (2010).  
 
A higher resolution hydrogeological map of Madagascar is available as part of the SADC hydrogeological map, at a scale of 1:2,500,000. It is available to view through the [https://ggis.un-igrac.org/ggis-viewer/viewer/sadcgip/public/default SADC Groundwater Information Portal]. More information on the map is in the [https://www.un-igrac.org/file/1239/download?token=9db4evoo SADC Hydrogeological Map and Atlas Brochure] (2010).  
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[[File:Madagascar_Hydrogeology4.png | center | thumb| 400px | Map of hydrogeology (aquifer type and productivity) of  Madagascar at 1:5 million scale. For more information on how the map was developed see the [[Africa Groundwater Atlas Hydrogeology Maps | Hydrogeology map]] resource page. [https://www.bgs.ac.uk/africagroundwateratlas/downloadGIS.html Download a GIS shapefile of the Madagascar geology and hydrogeology map].]].
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[[File:Madagascar_Hydrogeology4.png | center | thumb| 400px | Map of hydrogeology (aquifer type and productivity) of  Madagascar at 1:5 million scale. For more information on how the map was developed see the [[Africa Groundwater Atlas Hydrogeology Maps | Hydrogeology map]] resource page]].
  
  

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