THRUST STRUCTURE IN MICHIGAN COULD POINT TOWARD MORE TARGETS

David DesAutels Qatar General Petroleum Corp. Doha During the drilling of an Ordovician St. Peter development well in AuGres field of Arenac County, Mich., an unexpected, duplicate section of Silurian A-1 carbonate was encountered. This duplicate section has been interpreted to have been formed by thrusting that was caused by a nonlinear, right-lateral wrench fault. French faulting in Michigan is well documented, but transpression - resulting in thrusted structures - is rare.

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