page_title: Antalo Limestone
section_title: Limestone and karst geomorphology
hierarchical_section_title: Antalo Limestone / Limestone and karst geomorphology
caption_attribution_description: English: Santarfas washing place
context_page_description: 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.
context_section_description: The layering is sub-horizontal, the same as that of the underlying sedimentary formations. This gives rise to a structural sub-horizontal relief, with alternating cliffs and flats. Dissolution processes in limestone lead to the occurrence of caves. Most described caves in Mesozoic limestone in Ethiopia are located in the Harrar region (Sof Omar cave) and in the Dogu’a Tembien district of Tigray.
caption: A spring in Antalo Limestone at Santarfa
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