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More model informationUmber is a chemical sediment that formed by precipitation of manganese oxides as hot, hydrothermal water mixed with seawater. The manganese oxides deposited into a finely bedded sediment that is being extracted and used as a brown pigment for paint. This sample is from Cyprus and forms part of the teaching collection at Camborne School of Mines, University of Exeter.
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Mar 7th 2021
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