Journal article
Chronostratigraphic correlation of the Upper Silurian Salina Group for the Michigan and Appalachian Basins through coupled (delta (super 13) C (sub carb) ) chemostratigraphy and subsurface geophysical analyses
Geosphere (Boulder, Colo.), Vol.18(6), pp.1910-1925
09/23/2022
DOI: 10.1130/GES02515.1
Abstract
The Upper Silurian Salina Group of eastern North America is well known for its thick evaporite successions and hydrocarbon resources. These strata have been assigned to numerous chronostratigraphic schemes within Ohio and Michigan and are currently identified by varying subsurface and outcrop nomenclatural schemes. These chronostratigraphic challenges have persisted for over 50 yr and dramatically inhibit the correlation of events recorded in the Silurian section of eastern North America with the global record of Silurian biogeochemical events. To help resolve the chronostratigraphic correlation of these units, we provide new high-resolution delta (super 13) C (sub carb) chemostratigraphic analyses of a core located in central Ohio for strata assigned to the Greenfield and Tymochtee Formations and integrate existing biostratigraphic, chemostratigraphic, and subsurface geophysical data in western, southern, and eastern Ohio. The new data presented here, integrated for the first time with basinwide subsurface geophysical data, demonstrate a mid-late Homerian Stage global sea-level lowstand, suggest a short interval of tectonic stability within the study area at the beginning of "Salina B-G" deposition, during which accommodation was occupied by the Greenfield Formation and laterally equivalent strata, and provide chronostratigraphic constraints for basin flexure and potential forebulge migration associated with renewed tectonic activity. The new chronostratigraphic correlation of these strata provides a broader picture of Silurian environmental change across the eastern half of the Laurentian paleocontinent.
Details
- Title: Subtitle
- Chronostratigraphic correlation of the Upper Silurian Salina Group for the Michigan and Appalachian Basins through coupled (delta (super 13) C (sub carb) ) chemostratigraphy and subsurface geophysical analyses
- Creators
- Stephan C. Oborny - University of KansasBradley D. Cramer - University of IowaCarlton E. Brett - University of CincinnatiAlyssa M. Bancroft - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Geosphere (Boulder, Colo.), Vol.18(6), pp.1910-1925
- Publisher
- Geological Society of America; Boulder, CO
- DOI
- 10.1130/GES02515.1
- ISSN
- 1553-040X
- eISSN
- 1553-040X
- Grant note
- American Chemical Society-Petroleum Research Fund Doctoral New Investigator grant: 53196-DNI8 National Science Foundation: 1455030
We would like to thank the core librarian, Jeffrey Deisher, at the Ohio Division of Geological Survey (OGS) for providing spectral gamma-ray scans of the OW-11 core for Union County, Ohio. We would also like to thank Christopher Waid at the OGS for delivery of the OW-11 core to our laboratory at the University of Iowa and for providing unfettered access to subsurface geophysical data. Furthermore, we would like to thank Christopher Waid for verifying the identification of Devonian strata in our subsurface transects to ensure that our use of lithostratigraphic units was in agreement to those currently utilized by the OGS. Mark Kleffner also read an early version of our nomenclatural history, and we greatly appreciate his input. We would also like to thank Mark Kleffner and an anonymous reviewer for their reviews and comments, which improved this manuscript. This work was partially supported by the American Chemical Society-Petroleum Research Fund Doctoral New Investigator grant 53196-DNI8 and National Science Foundation Career grant 1455030 to B.D. Cramer. Journal fees were paid for by the Kansas Geological Survey.
- Language
- English
- Date published
- 09/23/2022
- Academic Unit
- Earth and Environmental Sciences; Iowa Geological Survey; IIHR--Hydroscience and Engineering; International Programs
- Record Identifier
- 9984701820902771
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