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The AAPG/Datapages Combined Publications Database

Utah Geological Association


Geology of East-Central Utah, 1991
Pages 45-54

Stratigraphy, Facies, and Depositional History of the Ferron Sandstone in the Canyon of Muddy Creek, East-Central Utah

Thomas A. Ryer


The Ferron Sandstone Member of the Mancos Shale is an eastward-thinning clastic wedge deposited during Turonian-Coniacian (Upper Cretaceous) time. Seven parasequence-level transgressive-regressive cycles are recognized in the Ferron. The delta-front sandstone bodies that define the cycles are characterized by an initial forward-stepping arrangement, followed by vertical-stacking and then back-stepping arrangements. This architecture indicates an initial strong supply of sediment relative to the creation of space within which sediment could accumulate, followed by near-balance and then a relative decrease in sediment supply. The upper part of the Ferron is well exposed along the length of the canyon of Muddy Creek, where facies relationships between delta-front, delta-plain, and alluvial-plain facies will be examined.

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