Crescent plan of unidirectional current ripples/dunes, Adigrat Sandstone Nebelet area (Tigray, Ethiopia)

Gastropod shell, Hypersaline Afdera Lake, Afar, Ethiopia

Late Quaternary Pyroclastic Fall Deposit likely representing caldera eruption, Meki area, Central Main Ethiopian Rift, Ethiopia

Astonishingly well sorted pyroclastic fall deposit, Alem Tena area, Central Main Ethiopian Rift, Ethiopia

Very thin quartz vein in intensively weathered low grade metamorphic rock slate, Nebelet area, Tigray, Ethiopia

The Lustrous defining characteristic of phyllite rock, Nebelet area, Tigray, Ethiopia

Adigrat Sandstone and Ethiopian Flood Basalt at work, Enticho Town, Tigray, Ethiopia

Descending the Northwestern Ethiopian Plateau (from the Oligocene-Miocene Ethiopian Flood Basalt to the Permo-Triassic Adigrat Sandstone), Mugulat area, Tigray, Ethiopia

Aluto caldera, Main Ethiopian Rift

Pumice quarry for cement production input, Meki area, Main Ethiopian Rift

Rose Colored Pumice Exposure, Aluto Geothermal Field, Central Main Ethiopian Rift

Eye-catching crack in gypsum rock, Afar, Ethiopia

Lake Langano, one of the rift lakes in the Main Ethiopian Rift. Aluto Volcano in the background

Aluto Volcano, Central Main Ethiopian Rift (seen from Lake Langano side)

Panoramic view of part of Aluto Caldera seen from the East side, Central Main Ethiopian Rift

Pelicans in line, Lake Ziway, one of the rift lakes, Main Ethiopian Rift

~90 °C hot fumarole, one of the geothermal surface manifestations, Aluto Geothermal Power Plant, Central Main Ethiopian Rift, between Lake Ziway to the north and Lake Langano to the south

Aluto Caldera, Central Main Ethiopian Rift, between Lake Ziway to the north and Lake Langano to the south

Mesa in front of another Mesa, Debre Damo, Tigray, Ethiopia

Do you know? The extremely siliceous volcanic rock, #OBSIDIAN, was first discovered in #ETHIOPIA. Reference Encyclopedia of Geology, 2005 (eds. Selley, R. C., Cocks, L. R. M. and Plimer, I. R.)