A platform-basin couplet persisted in north-central Nevada during Silurian and Early Devonian time. A western dolomite suite accumulated on the shallow-subtidal and peritidal carbonate platform, while a time-equivalent lime-stone-clastic suite accumulated in the subtidal, below wave base, basin, and basin-slope regime. At Copenhagen Canyon, the Roberts Mountains Formation, Windmill Limestone, and Rabbit Hill Limestone were deposited in the limestone-clastic suite basin. The Roberts Mountains and Windmill Formations are time correlative with the Lone Mountain Dolomite platform-margin facies. The Rabbit Hill Limestone is time correlative with the basal Nevada Group (lower Kobeh Member of the McColley Canyon Formation) platform facies.

Extracted from GSA Special Paper 159, Silurian and Lower Devonian Basin and Basin-Slope Limestones, Copenhagen Canyon, Nevada, by Jonathan C. Matti, Michael A. Murphy, and Stanley C. Finney.

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