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Adigrat Sandstone
Sandstone formation between Ethiopia and Eritrea border / From Wikipedia, the free encyclopedia
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The Adigrat Sandstone formation in north Ethiopia, in a wide array of reddish colours, comprises sandstones with coarse to fine grains, and locally conglomerates, silt- and claystones. Given the many lateritic palaeosols and locally fossil wood fragments, the formation is interpreted as a deposit in estuarine, lacustrine-deltaic or continental environments. The upper limit of Adigrat Sandstone is of Middle-Late Jurassic age (around 160 million years or Ma ago) whereas the lower boundary is Triassic (200 Ma).[2][3] There are numerous rock-hewn churches in this formation.
Quick Facts Type, Underlies ...
Adigrat Sandstone | |
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Stratigraphic range: Late Triassic–Early Jurassic | |
![]() Dabba Selama monastery in Dogu’a Tembien, established on a mesa in Adigrat Sandstone – one of the most inaccessible monasteries in the world[1] | |
Type | Geological formation |
Underlies | Antalo Limestone |
Overlies | Enticho Sandstone, Edaga Arbi Glacials, Fincha Sandstone |
Thickness | 600 m (2,000 ft) |
Lithology | |
Primary | Sandstone |
Other | Siltstone, Claystone, Dolomite |
Location | |
Coordinates | 14.1808°N 39.4752°E / 14.1808; 39.4752 |
Region | Tigray |
Country | ![]() ![]() |
Extent | Eritrea, Tigray |
Type section | |
Named for | Town of Adigrat |
Named by | William Thomas Blanford |
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