Download or read book Lower and Middle Devonian stratigraphy and depositional environments of the Sheep Desert Pintwater and Spotted Ranges Northern Clark County Nevada written by Linda Jane Jarvis and published by . This book was released on 1981 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: During much of the Early and Middle Devonian, shallow normal marine and peritidal sediments were deposited in northwestern Clark County, Nevada. Lack of a standard stratigraphic nomenclature for the area necessitates utilizing terminology from central Nevada and western Utah. The Sevy Dolomite represents Early Devonian deposition in a tidal flat environment. A Zlichovian transgression initiated deposition of the normal marine McColley Canyon Formation in the area. Continuation of that transgression was responsible for the deposition of the lower part of the Pintwater Formation, a new formation which consists of silty, argillaceous dolomite with abundant secondary chert. A Dalejan regression occurred during deposition of the upper part of the Pintwater Formation; it was during the later phases of this regression that the Oxyoke Canyon Sandstone was deposited in a complex barrier bar system which paralleled the coastline. Three Middle Devonian transgressions of varying magnitude have been recognized in southern Nevada. The first transgression, during the early Eifelian, was responsible for the widespread deposition of the Coarse Crystalline Member of the Simonson Dolomite. The Coarse Crystalline Member represents an entire transgressive-regressive cycle. The second Middle Devonian transgression, which occurred later in the Eifelian, initiated deposition of the restricted, shallow subtidal to supratidal Alternating Member of the Simonson Dolomite. Deposition of this unit was marked by periodic minor rises in sea level. Each dark-light dolomite couplet represents a single transgressive pulse followed by upward-shallowing sedimentation. Peritidal sedimentation was brought to an end by the third Middle Devonian transgression. This transgression, which occurred during the middle to late Givetian, brought the deeper water lithotope of the Guilmette Formation into the area. The tectonic setting in southern Nevada during the Early Devonian was significantly different than that in central Nevada; southern Nevada facies are different than central Nevada facies, and a relatively condensed conodont sequence indicates a slower rate of subsidence. During the Middle Devonian, however, facies throughout southern and east-central Nevada are markedly similar, as is the timing of depositional events. This indicates that the tectonic setting along the southern Cordilleran margin was more uniform by Middle Devonian time.
Download or read book O S U Theses and Dissertations 1978 1982 written by Oregon State University and published by . This book was released on 1983 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bibliography and Index of Geology written by and published by . This book was released on 1984 with total page 1584 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Devonian Stratigraphy and Depositional Environments of the Northern Antelope Range Eureka County Nevada written by William R. Trojan and published by . This book was released on 1978 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Devonian Stratigraphy and Paleontology of The Roberts Mountains Region Nevada written by Charles Warren Merriam and published by Geological Society of America. This book was released on 1940 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stratigraphy and Depositional Environments of Lower and Middle Cambrian Strata in the Lake Mead Region Southern Nevada and Northwestern Arizona written by Joseph Kirk Hardy and published by . This book was released on 1986 with total page 618 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Some Aspects of Lower and Middle Devonian Stratigraphy in Eureka County Nevada written by George Warner Kendall and published by . This book was released on 1975 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Upper Devonian to Upper Mississippian Strata of the Antler Foreland in the Leppy Hills Easternmost Northern Nevada written by Kathryn Marion Nichols and published by . This book was released on 1993 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: A multidisciplinary approach to research studies of sedimentary rocks and their constituents and the evolution of sedimentary basins, both ancient and modern.
Download or read book Stratigraphy Depositional Environments and Diagenesis of the Devonian Simonson and Guilmette Formations in the White Pine Egan and Schell Creek Ranges White Pine County Nevada written by F. Michael DeDen and published by . This book was released on 1993 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stratigraphy and Depositional Environments of Middle Proterozoic Rocks Northern Part of the Lemhi Range Lemhi County Idaho written by Russell G. Tysdal and published by . This book was released on 2000 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Depositional Environments and Biostratigraphy of the Lower Middle Cambrian White Pine Range Nevada written by Kenneth C. Hood and published by . This book was released on 1985 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biostratigraphy Depositional Environments and Paleogeography of Lower and Middle Devonian Rocks Death Valley Area California written by Thurman L. Heironimus and published by . This book was released on 1981 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aspects of a Stratigraphic System the Devonian written by David L. Dineley and published by . This book was released on 1984 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stratigraphy Fossil Distribution and Depositional Environments of the Upper Bridger Formation middle Eocene Southwestern Wyoming written by Paul Christopher Murphey and published by . This book was released on 2007 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stratigraphy Petrology and Depositional Environments of the Upper Devonian Devils Gate Limestone Eureka County Nevada written by Donald Haskins and published by . This book was released on 1979 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stratigraphy and Structure of the Southern Sulphur Spring Range Eureka County Nevada written by Joseph T. Lipka and published by . This book was released on 1987 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: Early Paleozoic limestones and dolomites of the shallow shelf transitional facies belt were mapped in the southern Sulphur Spring Range, Eureka County, Nevada. The four youngest units in the map area are in fault contact with the Lower Devonian rocks and were probably transported westward, along a low-angle normal fault. The crinoidal dolomites of the Hanson Creek Formation, dated as latest Ordovician in the map area, were deposited in a low-energy lagoon. Overlying the Hanson Creek Formation, with a gradational contact, is the lower member of the Lone Mountain Dolomite, a probable reef complex. The exposed thickness of the lower Lone Mountain Dolomite is estimated to be 250 feet. The Lower Devonian Old Whalen Member of the Lone Mountain Dolomite is composed of well-bedded, alternating brown and gray dolomites. The repetition of rock types in the Old Whalen Member indicates recurring shallow marine environments on a broad carbonate platform. The Old Whalen is estimated to be 1400 feet thick. Directly overlying the Old Whalen Member, is the Kobeh Member of the McColley Canyon Formation. Rocks of the McColley Canyon Formation were deposited on a shallow shelf under normal marine conditions. The mid-Lower Devonian Kobeh Member is sparsely to abundantly fossiliferous and varies from a peloidal wackestone to a peloidal sandy wackestone to a sandy peloidal packstone. The thickness is 276 feet. Overlying the Kobeh Member are the abundantly fossiliferous beds of the lower part of the Bartine Member. The lower part, of the Bartine ranges from a wackestone to a packstone and weathers to a chacteristic yellowish tan. The upper part of the Bartine varies from wackestone to packstone, is darker in color, and is sparsely to moderately fossiliferous. The thickness of the Bartine Member is 189 feet, and it is late Early Devonian in age. The Sadler Ranch Formation is a dolomitic wackestone containing conoids with or without brachiopods, and it is latest Early Devonian in age. The Sadler Ranch Formation was deposited on a shallow shelf under normal marine conditions. Above the Sadler Ranch Formation is the lower member of the Oxyoke Canyon Sandstone. The lower member of the Oxyoke varies from a peloidal packstone to sandy peloidal wackestone to quartzite. The upper member of the Oxyoke Canyon Sandstone is a structureless dolomitic mudstone. The Oxyoke Canyon Sandstone was probably deposited in a high to moderate energy lagoon with a subsequent decrease in depositional energy. The Middle Devonian Sentinel Mountain Dolomite overlies the Oxyoke Canyon Sandstone. The Sentinel Mountain is a structureless to finely laminated dolomite that was deposited in a lagoon that initially had open circulation, but which was later cut off. The youngest formation in the map area is the Permian Garden Valley Formation which is a reddish brown silicified conglomerate. The Sadler Ranch Formation, Oxyoke Canyon Sandstone, Sentinel Mountain Dolomite, and Garden Valley Formation are all present as allochthonous blocks, which were transported from the east as a result of movement along low-angle normal faults. The blocks were juxtaposed on top of the autochthonous Old Whalen Member of the Lone Mountain Dolomite and on the McColley Canyon Formation. Denudation of the Kobeh and Bartine Members of the McColley Canyon Formation occurred as a result of the movement on the faults. The timing of the movement on the low-angle normal faults is estimated to be Cretaceous because of the eastern source and the pre-Cretaceous age of the allochthonous rocks. The age is still problematical as a consequence of the lack of any cross-cutting dikes or other age-determinable units.
Download or read book Devonian and Mississippian Stratigraphy of the Southern Hot Creek Range Nye County Nevada written by John Paul Graham and published by . This book was released on 1982 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: Devonian carbonate rocks of the southern Hot Creek Range reflect a shift to the east of the carbonate shelf edge and a progressively deeper-water lithotope from late Early Devonian to early Middle Devonian time. Lower Devonian mudstones of the McColley Canyon Formation were deposited on an open shelf, dolomitized, and then flooded after gronbergi Zone time. As the sea transgressed eastward, a slope-basin lithotope developed. This deepening event is reflected in the hemipelagic deposition of the Middle Devonian Denay Limestone. Rapid flooding occurred during the Middle varcus Subzone with the onset of the Taghanic onlap. Pelletal and bioclastic-rich allodapic limestones represent distal deposition from turbidity currents originating on a slope to the east. A brief shallowing event is reflected in the rock succession at Empire Canyon and probably occurred in Interval 27, dengleri Zone. No Upper Devonian rocks have been identified in the southern Hot Creek Range or in the Warm Springs area. Deep-water deposition resumed in the Mississippian. A rising Antler highland in the west provided sediments to a foreland trough during the Early Mississippian. Conodonts from the Warm Springs area were dated to range across the Kinderhookian-Osagean boundary, from the isosticha-Upper crenulata Zone into the typicus Zone. Allodapic mudstones to detrital quartz packstones, deposited in a submarine fan complex, represent distal turbidity currents originating to the west and ponding in the trough. The stratigraphy of the southern Hot Creek Range has not been disrupted by the Roberts Mountains thrust. The limestones suggest deposition in a deepening marine lithotope as the carbonate shelf edge migrated to the east. Apparently, the Roberts Mountains allochthon progressed no farther east than the Dobbin Summit area in the central Monitor Range.
