Download or read book Stratigraphy and Depositional Environments of the Upper Pleistocene Chemehuevi Formation Along the Lower Colorado River written by U.S. Department of the Interior and published by CreateSpace. This book was released on 2014-03-04 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Chemehuevi Formation forms a conspicuous, widespread, and correlative set of nonmarine sediments lining the valleys of the Colorado River and several of its larger tributaries in the Basin and Range geologic province. These sediments have been examined by geologists since J. S. Newberry visited the region in 1857 and are widely cited in the geologic literature; however their origin remains unresolved and their stratigraphic context has been confused by inconsistent nomenclature and by conflicting interpretations of their origin.

Download or read book Stratigraphy and Depositional Environments of the Upper Pleistocene Chemehuevi Formation Along the Lower Colorado River written by Daniel V. Malmon and published by Geological Survey (USGS). This book was released on 2011 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Stratigraphy and depositional environments of the upper Pleistocene Chemehuevi Formation along the lower Colorado River written by and published by . This book was released on 2011 with total page 95 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Stratigraphy and depositional environments of the Upper Pleistocene Chemehuevi formation along the Lower Colorado River written by Daniel Malmon and published by . This book was released on 2011 with total page 95 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Modern Depositional Environments and Recent Alluvial History of the Lower Colorado River Gulf Coastal Plain of Texas written by Michael David Blum and published by . This book was released on 1992 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Colorado River is the trunk stream of a large polyzonal fluvial system that drains the Edwards Plateau and Gulf Coastal Plain of Texas. This dissertation summarizes previous work on the late Pleistocene and Holocene alluvial history of major valley axes in the upper Colorado drainage, on the Edwards Plateau, then presents a new spatially- and temporally-controlled allostratigraphic framework for late Pleistocene and Holocene alluvial deposits of the lower Colorado River on the Gulf Coastal Plain. The late Pleistocene and Holocene alluvial history of major streams in the upper Colorado drainage on the Edwards Plateau consists of a series of informal allostratigraphic units and bounding disconformities that were defined on the basis of areally persistent soil-geomorphic and stratigraphic relations. Chronological control for this allostratigraphic framework is afforded by numerous radiocarbon ages. Large valleys in the upper Colorado drainage contain late Pleistocene terraces and underlying fills that record an extensive period of deposition centered on the full-glacial time period, ca. 20-14,000 yrs BP. After abandonment of late Pleistocene floodplains, major streams incised bedrock valleys to present depths by ca. 11,000 yrs BP. Since that time there have been two episodes of net deposition, from ca. 11,000-5000 yrs BP, and ca. 4600-1000 yrs BP, whereas the modem incised, and in many cases underfit, channels and associated depositional environments represent the last millennium of fluvial activity. A very similar sequence of allostratigraphic units and bounding disconformities has been identified in the lower Colorado valley, on the Gulf Coastal Plain. The oldest unit of interest has been defined as the Eagle Lake Alloformation, after localities near the town of Eagle Lake that display characteristic soil-geomorphic and stratigraphic relationships with both older and younger deposits. Radiocarbon ages indicate the Eagle Lake unit was deposited during the late Pleistocene from ca. 20-14,000 yrs BP, roughly contemporaneous with full-glacial conditions. The main valley fill of the lower Colorado River has been defined as the Columbus Bend Alloformation, named after localities near the town of Columbus, and subdivided into three members on the basis of soil-geomorphic and stratigraphic relations. Radiocarbon ages indicate that Columbus Bend Member 1 was deposited during the latest Pleistocene through early to middle Holocene, from ca. 13-5000 yrs BP, whereas Member 2 represents the period ca. 5-1000 yrs BP. Columbus Bend Member 3 constitutes the modem depositional system of the lower Colorado River and represents the last millennium. Late Pleistocene and Holocene allostratigraphic units and bounding disconformities in the upper Colorado drainage and through the lower Colorado valley correlate with independently-identified changes in climate, vegetation cover, and the characteristics of upland soil mantles, and are interpreted to reflect a series of morphological and sedimentary responses to changes in the relationship between the discharge regime and the concentration of sediments along valley axes. In the far downstream portion of the lower Colorado valley, allostratigraphic units and bounding disconformities persist but their geometry, or stratigraphic architecture, changes substantially in response to the last glacio-eustatic cycle. In this part of the drainage, genesis of the alluvial sequence is interpreted to reflect adjustments to changes in climate, but sequence architecture reflects the details of the last glacio-eustatic cycle

Download or read book Modern depositional environments and recent alluvial history of the Lower Colorado River Gulf Coastal Plain of Texas written by Michael David Blum and published by . This book was released on 1992 with total page 572 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Late Cenozoic Drainage History of the Southwestern Great Basin and Lower Colorado River Region written by Marith C. Reheis and published by Geological Society of America. This book was released on 2008-01-01 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt: Papers in this title were selected from presentations from an April 2005 workshop sponsored by the U.S. Geological Survey Earth Surface Dynamics Program, the U.S. Geological Survey National Cooperative Geologic Mapping Program, and the Smithsonian Institution. Papers are divided into two broad topics of the configuration, areal extent, and temporal development of the chain of interconnected lakes that emptied into Death Valley during periods of the Pleistocene, and the late Cenozoic history of drainage integration in the lower Colorado River region. Papers are occasionally illustrated in both color and black-and-white; the publication contains no index.

Download or read book Stratigraphy Depositional Environments and Paleogeography of Coal bearing Strata in the Upper Cretaceous Mesaverde Group Central Grand Hogback Garfield County Colorado written by Dawn J. Madden and published by . This book was released on 1989 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: New correlations of the Trout Creek Sandstone Member and adjacent sandstone members between Rifle Gap and New Castle and new paleogeographic sketches for the oscillating shorelines at the time of Exiteloceras jenneyi and Didymoceras cheyennense.

Download or read book Preliminary Report on the Stratigraphy of the Morrison and Related Formations of the Colorado Plateau Region written by Lawrence Carey Craig and published by . This book was released on 1951 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geologic Excursions in Southwestern North America written by Philip A. Pearthree and published by Geological Society of America. This book was released on 2019-09-23 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Stratigraphy Lithology and Sedimentary Features of Quaternary Alluvial Deposits of the South Platte River and Some of Its Tributaries East of the Front Range Colorado written by David A. Lindsey and published by . This book was released on 2005 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Stratigraphy of the Morrison and Related Formations Colorado Plateau Region written by Lawrence Carey Craig and published by . This book was released on 1955 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Drastic Modification of the Depositional Style of the Lower Colorado River in Late Pleistocene Time written by James Luke Blair and published by . This book was released on 1996 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Depositional Environments of the Upper Triassic Chinle Formation in the Eastern San Juan Basin and Vicinity New Mexico written by Russell F. Dubiel and published by . This book was released on 1989 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Stratigraphy of the Mesaverde Group in the Central and Eastern Greater Green River Basin Wyoming Colorado and Utah written by Henry W. Roehler and published by . This book was released on 1990 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: See journals under US Geological survey. Prof. paper 1508.

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 and Paleoenvironments of Late Quaternary Valley Fills on the Southern High Plains written by Steven Bozarth and published by Geological Society of America. This book was released on 1995-01-01 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: