Shale Shaker Vol 72, No 4 July-August 2021

which has largely been ignored when addressing these various structural styles observed in southern Oklahoma. On this field tripwewill discuss the complex tectonic history alongside the controversial structural styles of the region including the style of rifting, the driving mechanisms for uplift, and the various structures that developed. Participants will be able to recognize brittle shear zones in granite and interpret the slip direction (normal, reverse, or strike-slip faulting). We will also look at several structures that can help us differentiate between structures that originated during the rifting phase verse the Pennsylvanian Orogeny and what that can tell us about paleo-stress conditions. Discussions will include the expected structural styles based on stress/paleo-stress orientations and the impact of pre-existing structures on later deformation. The trip will include two moderate hikes along with a guidebook which includes a few additional hikes/stops to great structures in the Wichita Mountains.

July ~ August 2021 | Page 111

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