It is a truism that
sedimentary geologists like bars; some actually study them. In this paper, Ahmed et al. describe the sandy
architectural elements that build deltaic deposit in an outcrop of the
Cretaceous Ferron Sandstone in Utah. The study evaluates the character of sandy
mouth bars and more distal detached bars, and interprets the features in the
context of jet-plume concepts. Detached sand bodies are interpreted to be
deposited by descending, inertial and hyperpycnal flows, whereas the
cross-bedded sands in the upper delta front are interpreted as radial bars
reflecting a greater degree of frictional deceleration. Shallow terminal
distributary channels lie in the uppermost delta front topset. Aside from the concepts, the characterizations
of grain size variation and shale dimensions provide data potentially useful for
fluid flow modeling of analog subsurface reservoirs.
Facies architecture and stratigraphic evolution of ariver-dominated delta front, Turonian Ferron Sandstone, Utah, U.S.A. by Sumiyyah Ahmed, Janok P. Bhattacharya, Daniel E.
Garza, and Yangyang Li
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