Biogenic_substance, Biogenic_substance Information, Biogenic


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A biogenic substance is a substance produced by life processes. It may be either constituents, or secretions, of plants or animals.

Examples

Coal and oil are possible examples of constituents which may have undergone changes over geologic time periods.
Chalk and limestone are examples of secretions (marine animal shells) which are of geologic age.
Cotton and wood are biogenic constituents of contemporary origin.
Pearls, silk and ambergris are examples of secretions of contemporary origin.

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