The two links below will most likely result in a PDF opening on your desktop. Authors of the two articles, respectively: Timothy O. Nesheim and Julie A LeFever.
The Tyler, from GEO News, July, 2017. Review Of The 1st Unconventional Testing of the Prospective Tyler Formation, Southwestern North Dakota. This link will open a PDF on your desktop: https://www.dmr.nd.gov/ndgs/documents/newsletter/2017Summer/Review%20of%20the%201st%20unconventional%20testing%20of%20the%20prospective%20Tyler%20Formation.pdf
The Pronghorn, from GEO News, July 20, 2017. Ichnology Applied to the Pronghorn Member, Bakken Formation (Mississippian-Devonian). This link will open a PDF on your desktop: https://www.dmr.nd.gov/ndgs/documents/newsletter/2017Summer/Ichnology%20Applied%20to%20the%20Pronghorn%20Member%20Bakken%20Formation.pdf
I'll come back to these later, but there is a "bombshell" with regard to the Tyler ... at least from my perspective.