Dating of sedimentary rock intervals using visual comparison of carbon isotope records : a comment on the recent paper by Bergström et al. concerning the age of the Winneshiek Shale

Summary, in English

The recently published Lethaia paper by Bergström et al. (https://doi.org/10.1111/let.12269) on the age of the Ordovician Winneshiek Shale (Iowa, USA), and the impact that formed the Decorah crater which hosts this rock unit, is an interesting scientific contribution, although there are a number of problems with the interpretations and data presentation that merit comment. Due mainly to a lack of adequate critical assessment of δ¹³C data and biostratigraphical control, we contend that the conclusions of Bergström et al. are poorly founded and should not be cursorily accepted and propagated in future scientific literature.

• Författare: Anders Lindskog; Seth A. Young
• Avdelning/ar: Berggrundsgeologi
• Publiceringsår: 2019-01-16
• Språk: Engelska
• Sidor: 299-303
• Publikation/Tidskrift/Serie: Lethaia
• Volym: 52
• Issue: 3
• Länkar: http://dx.doi.org/10.1111/let.12316
• Dokumenttyp: Artikel i tidskrift
• Förlag: Taylor & Francis
• Ämne: Geology
• Nyckelord: δ13C; Chemostratigraphy; Correlation; Decorah impact crater; Ordovician; Whiterockian
• Status: Published
• Projekt: Early Paleozoic isotope geochemistry, climate and environment
• ISBN/ISSN/Övrigt: ISSN: 0024-1164