The age of the Middle Ordovician Winneshiek Shale: reply to a critical review by Lindskog & Young (2019) of a paper by Bergström et al. (2018a)

Stig M. Bergström, Birger Schmitz, Huaibao P. Liu, Fredrik Terfelt, Robert M. Mckay

Research output: Contribution to journalArticlepeer-review

2 Citations (SciVal)

Abstract

A recent review by Lindskog & Young (2019) of a paper published in Lethaia by Bergström et al. (2018a) contains many errors, misleading statements and unsupported opinions. Their review claims that we did not consider biostratigraphy in our efforts to chemostratigraphically date the Winneshiek Shale. That this is incorrect is shown by the fact that Liu et al. (2017), which contains a two-page review of all fossil evidence that has a bearing on the age of the Winneshiek Shale and was written by Bergström, was cited in Bergström et al. (2018a) and used extensively in our chemostratigraphical age assessment of the unit. Interestingly, recent research provides support for our conclusion regarding the age of the Winneshiek Shale, indicating that at least its upper part is coeval with the Nicholsonograptus fasciculatus Graptolite Zone and the Eoplacognathus pseudoplanus Conodont Zone. In constructing their arguments, Lindskog & Young (2019) provide no alternative interpretations or corrections of scientific value.

Original languageEnglish
Pages (from-to)1-4
Number of pages4
JournalLethaia
Volume53
Issue number1
Early online date2019 May 23
DOIs
Publication statusPublished - 2020 Jan

Subject classification (UKÄ)

  • Geology

Keywords

  • Bergström et al. 2018a
  • chemostratigraphy
  • Decorah Impact Crater
  • reply to critical review
  • Winneshiek Shale

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