authigenic
/ˌɔːθɪˈdʒɛnɪk
/adjective Geology
(Of minerals and other materials) formed in their present position. Often contrasted with allogenic.This mineral is probably authigenic clay that formed in the spring waters while the silica was being precipitated....
- These may be reprecipitated and incorporated into authigenic materials, such as glauconite, various carbonates, and iron and manganese oxides.
- He regarded the iron phosphate strengite to be the typical form of authigenic phosphate in freshwater deposits.
Origin
Late 19th century: from Greek authigenēs 'born on the spot' + -ic.
- Carter, Howard
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