%0 Journal Article %J GSA Bulletin %D 2019 %T Early Paleozoic rifting and reactivation of a passive-margin rift: Insights from detrital zircon provenance signatures of the Potsdam Group, Ottawa graben: Comment %A E. Landing %A Hersi, Osman Salad %A L. Amati %A Westrop, Stephen R. %A Franzi, David A. %X

This comment outlines fundamental problems in Lowe et al.’s synthesis (2018) of the early Paleozoic stratigraphic architecture of the eastern Ottawa-Bonnechere aulacogen that preclude an accurate analysis of the region’s geological and depositional history and even an adequate stratigraphic provenance of the detrital zircons that they analyze. These problems include: inaccurate lithostratigraphic and contradictory biostratigraphic correlations that have also led to extension of the Potsdam “Group” into the Lower Ordovician; a proposed allostratigraphy that contradicts itself when tested with existing litho- and biostratigraphic data; redefinitions of earlier defined lithostratigraphic units that lead to confusion on close reading; and errors in interpreted depositional environments and lithostratigraphic contacts.

%B GSA Bulletin %V 131 %P 695-698 %G eng %U https://pubs.geoscienceworld.org/gsa/gsabulletin/article/568494/Early-Paleozoic-rifting-and-reactivation-of-a %N 3-4 %R 10.1130/B35104.1