|Latitude & Longitude (WGS84):||26° 19' 6'' North , 12° 51' 7'' West|
|Latitude & Longitude (decimal):||26.31861,-12.85222|
|Köppen climate type:||BWh : Hot deserts climate|
The open pit phosphate mines operated by Phosboucraa (Fosbucraa).
Located near the small village of Bu Craa (Bou Craa), in the northern part of the Western Sahara, approx. 100 km SW of the second major town of Smara.
The deposits (Oued Eddahab Phosphate deposits) are of sedimentary origin and of Upper Cretaceous-Palaeocene and Eocene age. They consist of two phosphate-bearing layers. Commonly, the quartz-bearing geodes (see below) are found in the upper layer or above.
Note: the snow-white quartz geodes offered under the name "Smara" on European shows or eBay are actually coming from the phosphate mines of Bu Craa.
Regions containing this locality
|African Plate||Tectonic Plate|
|Sahara Desert, North Africa||Desert|
|Northwest Africa Meteorites||Meteorite Fall Location|
Select Mineral List TypeStandard Detailed Strunz Dana Chemical Elements
Detailed Mineral List:
Reference: Various collections
List of minerals arranged by Strunz 10th Edition classification
|Group 4 - Oxides and Hydroxides|
List of minerals arranged by Dana 8th Edition classification
|Group 75 - TECTOSILICATES Si Tetrahedral Frameworks|
|Si Tetrahedral Frameworks - SiO2 with  coordinated Si|
This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.
Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org
2.588 - 66 Ma
2.588 - 23.03 Ma
|Cenozoic sedimentary rocks|
Age: Neogene (2.588 - 23.03 Ma)
Lithology: Sedimentary rocks
Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. 
|Eocene - Paleocene|
33.9 - 66 Ma
Age: Paleogene (33.9 - 66 Ma)
Reference: Asch, K. The 1:5M International Geological Map of Europe and Adjacent Areas: Development and Implementation of a GIS-enabled Concept. Geologisches Jahrbuch, SA 3.