(University of the Witwatersrand) South Africa's history and economy has been built on its rich natural treasures of a number of precious metals, stones and minerals. The country's mineral deposits have been created over hundreds of millions of years through processes that are still not completely understood. One of these processes is the origin of chromitite layers hosted by layered intrusions - a major source of chromium on our planet. The study reveals the formation of these layers.
from EurekAlert! - Archaeology http://ift.tt/2F7JIyg
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