Download or read book Ostracode Fauna and Lithofacies of the Lower Devonian Pragian Kobeh Member McColley Canyon Formation Central Nevada written by Lisa M. Luptowitz and published by . This book was released on 1990 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Guide to Programs of Geography in the United States and Canada written by and published by . This book was released on 1991 with total page 912 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Lower Devonian Lithostratigraphy and Graptolite Biostratigraphy Copenhagen Canyon Nevada written by Stanley Charles Finney and published by . This book was released on 1971 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Unusual Central Nevada Geologic Terranes Produced by Late Devonian Antler Orogeny and Alamo Impact written by Forrest G. Poole and published by Geological Society of America. This book was released on 2015-10-08 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This volume is the product of nearly 25 years of geologic investigations. It is an exposition of two small areas, both less than 25 km from the front of the Mississippian Roberts Mountains thrust, but each displaying a different, unique geologic terrane, previously undocumented in Nevada and perhaps in North America"--
Download or read book B068 Geology of the Mount Velma Quadrangle Elko County Nevada written by and published by NV Bureau of Mines & Geology. This book was released on with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Lower Devonian Ostracodes from the Hesperius Eurekaensis Delta and Pesavis Conodont Zones of Central Nevada written by Gena Maria Evola and published by . This book was released on 1983 with total page 298 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 Lower Devonian written by Maryland Geological Survey and published by . This book was released on 1913 with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stratigraphic Paleontologic and Petrographic Analysis of the Tor Limestone written by Michael Edwin Anderson and published by . This book was released on 1990 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Lower Devonian written by and published by . This book was released on 1913 with total page 598 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nonmarine Ostracodes in the Lakota Formation Lower Cretaceous from South Dakota and Wyoming written by Israel Gregory Sohn and published by . This book was released on 1979 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Devonian Rocks of the Roberts Mountains Allochthon in the Roberts Mountains Central Nevada written by Gregory Thomas Duecker and published by . This book was released on 1985 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ostracoda of the Devonian Deposits in the Central Devonian Field and the Middle Volga Region written by Elena Nikolaevna Polenova and published by . This book was released on 1971 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book B031 Cambrian formations of the Eureka and Pioche districts Nevada written by D. M. Lemmon and published by NV Bureau of Mines & Geology. This book was released on with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Lower and Middle Devonian Carbonate platform and Outer shelf basin Deposits Flanking Railroad Valley Nevada written by Storr L. Nelson and published by . This book was released on 1996 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lower and Middle Devonian strata crop out on the former stable carbonate platform that existed in the Quinn Canyon Range, through the carbonate shelf edge in the Pancake Range, to the carbonate slope and outer-shelf basin in the Reveille Range. The strata of the Reveille Range record a transition from deposition on the carbonate platform in the Lower Devonian, to deposition at the carbonate platform margin, to deposition in the outer-shelf basin in the Middle Devonian. Conodonts collected from the base of the Sevy Dolomite yield a kindlei-Zone age, an indication that the Sevy Dolomite is younger than previously recognized. Throughout the Lower and Middle Devonian, carbonate strata of the Pancake Range and Quinn Canyon Range were deposited on the shallow carbonate platform. Conodonts collected from the base of the Lower Alternating Member of the Simonson Dolomite in the Quinn Canyon Range have a slightly older age (serotinus- to costatus Zone) than other eastern Nevada locations. The Lower Devonian Sevy Dolomite was deposited in a shallow carbonate subtidal through supratidal environment and is similar in outcrop throughout the ranges. Petrographic studies show that the samples are lithologically and diagenetically similar, indicating a similar intensity of dolomitization from the precursor calcareous mudstone. The Formation classifies as bioturbated mudstone and wackestone. The Middle Devonian Simonson Dolomite was deposited in shallow carbonate subtidal through supratidal environments. The Simonson Dolomite was affected by Milankovitch Cycles, glacioeustatic oscillations of sea level, producing a characteristic rhythmic bedding. The Middle Devonian Sadler Ranch Formation and Denay Limestone are lithologically and diagenetically different from the shallow water deposits of the Lone Mountain Dolomite, Sevy Dolomite, and Simonson Dolomite. The Sadler Ranch Formation and Denay Limestone were deposited at the carbonate platform edge and on the carbonate slope and outer-shelf basin, respectively. The Sadler Ranch Formation is dolomitized and may be classified as fossiliferous wackestone and mudstone. The Denay Limestone is not dolomitized and is classified as mudstone and fossiliferous grainstone and packstone. Dolomitization in the Paleozoic strata of Nevada is a secondary feature, an early diagenetic replacement of strata which were originally limestone. This replacement process was controlled by transgressions and regressions of the shoreline. Shallow carbonate platform deposits (shelfal and tidal-flat) are dolomitized, whereas deep water outer-shelf basin and slope deposits are not.
Download or read book Structural and Stratigraphic Relationships of Devonian Reservoir Rocks East Central Nevada written by and published by . This book was released on 1993 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:
