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Union of South Africa, Department of Mines, 1956 - Barberton Greenstone Belt (South Africa and Swaziland) - 253 pages, illustrated, index, fold-out map, softcover, condition: very good.
The Barberton Mountain Land, specifically the Barberton Greenstone Belt, has significantly contributed to our understanding of early Earth geology by providing exceptionally well-preserved rock sequences dating back 3.6 billion years, offering insights into the formation of the first continental crust, evidence of early life forms, meteorite impact events, and the composition of the ancient atmosphere, making it a unique geological site for studying the planet's early history; particularly notable is the presence of komatiite volcanic rocks, a rare rock type indicative of extremely hot mantle conditions in the early Earth.