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Microfacies sedimentology of the lower-middle Kinblade (Ordovician) Formation, Slick Hills, southwestern Oklahoma
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[Fort Worth, Tex.] : Texas Christian University,
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2013
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In the late Cambrian (Franconian), a marine transgression took place on the Laurentian craton throughout a range of Cambrian rhyolite hills, and is now exposed in the Slick Hills of Southwestern Oklahoma. Evidence of the Cambro-Ordovician marine transgression is recorded in the Timbered Hills and the overlying Arbuckle Group. The Arbuckle Group is a 7, 000 ft. thick carbonate platform comprised of six formations: the Fort Sill, Signal Mountain, Mackenzie Hill, Cool Creek, Kindblade, and West Spring Creek at the top. Each formation displays diverse cyclic relationships persevered in the facies sequences and fauna. The present study examines an exposed portion of the Kindblade Formation. The exposure displays an extensive variety of microbial carbonates (stromatolites and thrombolites) as well as deep-water micritic fabrics and diagenetic features. Sediment analysis revealed the paleoenvironment as being a shallow subtidal open-marine environment with subtle cycles from storms and oscillating waves. These were differentiated by varying lithofacies associations found within thin sections and outcrop observations.
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Geological Sciences