Rocks are inorganic, but living things make resin, bitumen, and amber {organic mineral}.
Living things make minerals {amber, mineral}.
Dead living things can form minerals {bitumen}|.
Rocks {lagerstätten} can retain traces of soft-bodied animals and animal burrows. Solnhofen Limestone in Germany has fossil Archaeopteryx. Burgess Shale in British Columbia, Canada, has Cambrian fossils. Chienjiang in Yunnan Province, China, has early Cambrian fossils. Doushantuo Formation in Guizhou Province, China, has early Precambrian fossils in calcium phosphate. Ediacara Hills in Australia have Precambrian fossils.
pearl-oyster inside shell {nacre} {mother-of-pearl}|.
pearl-oyster round excretion {pearl, gem}|.
Plants make minerals {resin, mineral}|.
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Date Modified: 2022.0225