Weathering of pyroclastic deposits

Weathering of pyroclastic deposits

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Credit: DR JUERG ALEAN/SCIENCE PHOTO LIBRARY

Caption: Pyroclastic deposits on Ponta de Sao Lourenco, Madeira, are weathering in a peculiar way: water may enter along joints and induces chemical reactions along these, which in turn cause the reddish discoloration of the original grey pyroclastic deposit.

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Keywords: ash, deposit, erosion, geological, geology, madeira, no-one, nobody, ponta de sao lourenco, portugal, pyroclastic, volcanic. rock, volcanism, volcano, weathering

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