单词	chronostratigraphy
释义	chronostratigraphy /ˌkrɒnə(ʊ)strəˈtɪɡrəfi / noun [mass noun] The branch of geology concerned with establishing the absolute ages of strata.This unique succession of ammonoid assemblages allows unequivocal recognition of European substage-level chronostratigraphy across the mid-Carboniferous boundary interval in North America for the first time.... Stratigraphy, then, was originally concerned with rocks, that is, lithostratigraphy; it soon afterwards included the ranges of fossils throughout the successions, biostratigraphy; and the more abstract chronostratigraphy. A tentative correlation with a Tethyan reference carbon-isotope curve allows the provisional application of stage-level chronostratigraphy to the Wealden Group. Derivatives chronostratigraphic /ˌkrɒnə(ʊ)stratɪˈɡrafɪk/ adjective ... The division of the Phanerozoic into chronostratigraphic divisions - eras, periods, epochs and ages - has itself evolved over a period of about 200 years. Marine tephra layers form important chronostratigraphic markers and may also provide information on eruption dynamics and chronology. Spectral gamma-ray logs provide additional data on lithological composition that can aid identification of chronostratigraphic surfaces in a high-resolution sequence stratigraphic correlation framework.
随便看	cryptogamy cryptogenetic cryptogenic cryptogenous cryptogram cryptogramatic cryptogramatist cryptogramic cryptogrammatic cryptogrammatist cryptogrammic cryptogrammist cryptograph cryptographer cryptographic cryptographical cryptographically cryptographist cryptography cryptolalic cryptolect cryptologic cryptological cryptologist cryptology

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