Triassic Terrain – Secondary Lands of Tigrinyaland and Semien
This is the tenth installment of the geological description of Tigrinyaland and Semien, and it explores the triassic terrains forming part of the secondary lands.
Secondary Lands of Tigrinyaland and Semien: Carbonic Terrain
This is the eighth installment of the geological description of Tigrinyaland and Semien, and it explores the secondary lands made up of combustible terrains.