Katian (Upper Ordovician) δ13C chemostratigraphy and sequence stratigraphy in the United States and Baltoscandia: A regional comparison
作者： Stig M. Bergström , Seth Young , Birger Schmitz
DOI: 10.1016/J.PALAEO.2010.02.035
关键词: Geology 、 Sea level 、 Biostratigraphy 、 Delta 、 Chemostratigraphy 、 Ordovician 、 Paleontology 、 Sequence stratigraphy 、 Katian 、 Transgressive 、 Earth-Surface Processes 、 Palaeontology 、 Ecology, Evolution, Behavior and Systematics 、 Oceanography
摘要: delta C-13 values of numerous limestone samples from Katian (Upper Ordovician) successions in Oklahoma and the Upper Mississippi Valley document presence at least three four positive excursions that have been recognized lower-middle interval Cincinnati region Ohio. Kentucky, Indiana. A comparison with Estonia reveals five out six now recorded through succession are present coeval stratigraphic intervals Estonia, which suggests these represent global perturbations carbon cycle study relations between flooding events shows only some occur transgressive whereas other regressive strata hence, this is conflict idea isotope forced by rises sea level Part a previously published attempt to use Ordovician sequence stratigraphy for trans-Atlantic correlation shown be seriously phase biostratigraphy chemostratigraphy Several sequences do not appear counterparts they reflect eustatic, but local, conditions (C) 2010 Elsevier B V All rights reserved. (Less)
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