Sebakwian Group

geological feature, Africa

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July 13, 2026

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The Sebakwian Group refers to geological formations found in Zimbabwe, Africa, dating back approximately 3.8 to 3.75 billion years ago. These formations are part of the larger greenstone-granite belts, which are considered ancient slices of oceanic and island arc crust that have been tectonically assembled.1

These belts are characterized by volcanic rocks, including ultramafic and basaltic lavas, and overlying sedimentary layers such as shales and sandstones. The term "greenstone" comes from the metamorphic minerals like chlorite and epidote that form during low-temperature and low-pressure metamorphism. The Sebakwian Group represents an early stage in the Earth's crustal evolution during the Archean Eon.12

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Precambrian
Age and occurrence of greenstone-granite belts
…belt in South Africa; the Sebakwian, Belingwean, and Bulawayan-Shamvaian belts of Zimbabwe; the Yellowknife belts in the Slave province of Canada; the Abitibi, Wawa, Wabigoon, and Quetico belts of the Superior province of Canada; the Dharwar belts in
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…belt in South Africa; the Sebakwian, Belingwean, and Bulawayan-Shamvaian belts of Zimbabwe; the Yellowknife belts in the Slave province of Canada; the Abitibi, Wawa, Wabigoon, and Quetico belts of the Superior province of Canada; the Dharwar belts in
Read More