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)
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