Master of Science (MS)
Number of Pages
In the Grand Canyon and Lake Mead areas of Nevada, Arizona and Utah, there is a light-colored dolomite succession that conformably overlies the Cambrian Muav Limestone; McKee (1945) referred to these rocks as undifferentiated Cambrian dolomites, and their age and correlation have remained uncertain. Seven stratigraphic sections were studied, including those at Quartermaster Canyon, Mile-269 Canyon, Diamond Bar Ranch, Devil's Cove, Tramp Ridge, Whitney Ridge, and Frenchman Mountain. The thickness of the undifferentiated dolomites increases to the west from 78 meters at Diamond Bar Ranch to 371 meters at Frenchman Mountain. In the Grand Canyon area, the undifferentiated dolomites are unconformably overlain by Devonian rocks, while in craton-margin sections the undifferentiated dolomites are conformably overlain by the Upper Cambrian Nopah Formation; Within the undifferentiated dolomites eight depositional facies were established: (1) burrow-mottled facies; (2) flat-pebble grainstone facies; (3) stromatolite facies; (4) oolitic-grainstone facies; (5) bioclastic-grainstone facies; (6) ribbon-rock facies; (7) nodular facies; and (8) laminite facies. The depositional environment represented by each facies was established; I identified seven depositional sequences within the undifferentiated dolomite succession. (Abstract shortened by UMI.).
Area; Arizona; Cambrian; Canyon; Correlation; Dolomites; Grand Canyon; Lake; Mead; Lake Mead; Nevada; Sedimentology; Sequences; Stratigraphy; Undifferentiated; Utah
University of Nevada, Las Vegas
Korolev, Viacheslav Sergeevich, "Sequence stratigraphy, sedimentology, and correlation of the undifferentiated Cambrian dolomites of the Grand Canyon and Lake Mead area" (1997). UNLV Retrospective Theses & Dissertations. 3332.