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Geology:
Walk Through TimeTalcDolomite is a sedimentary rock composed largely of calcium magnesium carbonate. This tan dolomite was formed on an ocean floor. It was then intruded by the darker 1.1 billion year old molten diabase which came up through the Earth's crust. This hot intrusion changed the dolomite into talc. Precambrian > Proterozoic eon > Mesoproterozoic era > Stenian period Next > < Previous |
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These items are historical in scope and are intended for educational purposes only; they are not meant as an aid for travel planning. Copyright ©Walter Feller. 1995-2023 - All rights reserved. |