. Brigham Young University science bulletin. Biology -- Periodicals. 14 Brigham Young Univebsity Science Bulletin Paleozoic section which includes a basal clastic st'(iuence of Devonian and Mississippian age overlain by a carbonate secjuence, the Lisbunie Limestone, of Mississippian and Pennsylvanian age; and an upper secjuenee of clastic Jurassic and Cretaceous rocks including the Kingak Shale and unnamed Cretaceous formations (Jeletzky, 1961; Mountjoy, 1967b). A fourth sequence of Fennian and Triassic rocks is exposed in the western part of the area (Mountjoy, 1967a) be- tween the Lisbumc Li
. Brigham Young University science bulletin. Biology -- Periodicals. 14 Brigham Young Univebsity Science Bulletin Paleozoic section which includes a basal clastic st'(iuence of Devonian and Mississippian age overlain by a carbonate secjuence, the Lisbunie Limestone, of Mississippian and Pennsylvanian age; and an upper secjuenee of clastic Jurassic and Cretaceous rocks including the Kingak Shale and unnamed Cretaceous formations (Jeletzky, 1961; Mountjoy, 1967b). A fourth sequence of Fennian and Triassic rocks is exposed in the western part of the area (Mountjoy, 1967a) be- tween the Lisbumc Limestone and the Jurassic Kingak Shale. A total thickness ot approximately 40,000 feet of beds is present in the area (Fig. 10). Cretaceous Cretaceous rocks undifferentiated Gray shale and mudstone with moderately thick coarser grained sandstone units in the lower part. Mudstone and shale are silcy throughout, with some beds distinctly siliceous in the lower third. Sandstones of the unit form prominent ridges and cuestas but mudstones and shales form tlie lowlands of the northernslope and intermediate valleys. Jurassic —. Triassic Permian Pennsylvanian Mississippian Devonian Precambrian to Silurian KINGAK SHALE Dark-gray to black, somber-weathering shale and siltstone that forms broad valleys and tundra-covered slopes. Pan of the formation is very siliceous and all of the formation contains ironstone Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Brigham Young University. Provo, Utah : Brigham Young University
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