Diatomaceous earth quarry. Exposed in this quarry near St Bauzile in mid-eastern France is a soft, white sedimentary deposit called diatomite. The diatomite is formed by the deposition, in a lake or inland sea, of the tiny, siliceous tests of myriad planktonic microorganisms, single-celled protozoans known as diatoms or radiolarians. The diatomite is overlain by dark brownish basalt, a massive volcanic rock, here solidified in a columnar mode. The diatomite, a source of very pure silica, is mined from this quarry.
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Creative#:
TOP28927605
Source:
達志影像
Authorization Type:
RM
Release Information:
須由TPG 完整授權
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n/a
Property Release:
n/a
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No
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