Antalo Limestone | |
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Stratigraphic range: Oxfordian-Kimmeridgian ~ | |
Type | Geological formation |
Underlies | Mugher Mudstone |
Overlies | Adigrat Sandstone |
Thickness | 800 m (2,600 ft) |
Lithology | |
Primary | Limestone, marl, calcareous sandstone |
Other | Grainstone, wackestone |
Location | |
Coordinates | 13°35′52″N 39°16′38″E / 13.5977°N 39.2772°E |
Approximate paleocoordinates | 7°30′S 26°36′E / 7.5°S 26.6°E |
Region | Tigray |
Country | Ethiopia Eritrea |
Extent | Mekelle Outlier, Danakil Alps |
Type section | |
Named for | Antalo town |
Named by | William Thomas Blanford |
Year defined | 1868 |
The Antalo Limestone, also known as the Antalo Sequence, is a geological formation in Ethiopia. It is between 300 and 800 metres thick and comprises fossiliferous limestones and marls that were deposited in a reef. Marine microfossils have shown an age between 165 and 150 million years.[1][2]