Primary Lands of Tigrinyaland and Semien: Granite, Gneiss and Related Rocks
This is the 2nd part of the geological description of Tigrinyaland and Semien published by the French explorers Messrs. Ferret and Galinier in 1847. It presents the primary terrains of Tigrinyaland and Semien composed of granite, gneiss and related rocks as discovered by the two explorers.