Acid maceration
From Infogalactic: the planetary knowledge core
Acid maceration is a technique to extract organic microfossils from a surrounding rock matrix using acid.
Hydrochloric acid or acetic acid may be used to extract phosphatic fossils, such as the small shelly fossils, from a carbonate matrix.
Hydrofluoric acid is also used in acid macerations to extract organic fossils from silicate rocks. Fossiliferous rock may be immersed directly into the acid, or a cellulose nitrate film may be applied (dissolved in amyl acetate), which adheres to the organic component and allows the rock to be dissolved around it.[1]
See also
References
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