e/Conodont Alteration Index

Information
has gloss	eng: The Conodont Alteration Index (CAI) is used to estimate the maximum temperature reached by a sedimentary rock using thermal alteration of conodont fossils. Conodonts in fossiliferous carbonates are prepared by dissolving the matrix with acid, since the conodonts are composed of apatite and thus do not dissolve. The fossils are then compared to the index under a microscope.
lexicalization	eng: Conodont alteration index
instance of	(noun) the earth science that studies fossil organisms and related remains paleontology, fossilology, palaeontology