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Book Genetic Stratigraphy of the Dockum Group Triassic Palo Duro Canyon Panhandle Texas

Download or read book Genetic Stratigraphy of the Dockum Group Triassic Palo Duro Canyon Panhandle Texas written by Steven J. Seni and published by . This book was released on 1978 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Triassic Dockum Group is a complex assemblage of lacustrine, deltaic, and fluvial facies. Excellent exposures of these rocks were studied in and around Palo Duro State Park where the Prairie Dog Town Fork of the Red River and its tributaries have carved a network of steep-walled canyons. Three-dimensional exposures of the Dockum have permitted study of lateral as well as vertical facies relationships. Three progradational genetic sequences were delineated within the study area. A genetic sequence consists in ascending order of: lacustrine mudstone, deltaic siltstone-sandstone-conglomerate, and fluvial sandstone-conglomerate. The following three lines of evidence indicate that complex base-level changes, caused by fluctuations in lake area and depth, occurred during deposition of the Dockum Group. Within the first genetic sequence burrowed lacustrine mudstones are interbedded with caliche horizons. These caliche horizons contain discrete burrowed and pisolitic carbonate nodules that are composed of microspar calcite, sparry calcite, and minor dolomite. Silicified evaporite nodules occur at the base of this unit. The second genetic sequence comprises a progradational lacustrine delta system which was truncated by a valley-fill system which formed in response to diminished lake depth and area. The valley-fill system comprises a transgressive fluvial-deltaic-lacustrine sequence encased within an overall progradational sequence. The third genetic sequence is composed of classic "Gilbert-type" lacustrine deltas with prominent foreset beds indicating deposition in 8 to 15 m of water. Ephemeral lakes characterized the first and second progradational sequences. Lacustrine fan deltas formed in water 1 to 10 m deep. The third progradational sequence was deposited in more continuously deep-water (10-20 m) lakes. A vertical sequence through Dockum Group rocks reveals a change from alternating humid and arid conditions of the first and second progradational sequences toward continuously humid conditions which prevailed during deposition of the third progradational sequence.

Book The Nonmarine Triassic

    The Nonmarine Triassic

    Book Details:
  • Author : Spencer G. Lucas
  • Publisher : New Mexico Museum of Natural History and Science
  • Release :
  • ISBN :
  • Pages : 522 pages

Download or read book The Nonmarine Triassic written by Spencer G. Lucas and published by New Mexico Museum of Natural History and Science. This book was released on with total page 522 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Stratigraphy Sedimentology and Depositional Environments of the Coal bearing Jurassic Cretaceous Kootenay Group Alberta and British Columbia

Download or read book Stratigraphy Sedimentology and Depositional Environments of the Coal bearing Jurassic Cretaceous Kootenay Group Alberta and British Columbia written by D. W. Gibson and published by . This book was released on 1985 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt: Strata of the Kootenay Group are of economic interest because of their potential as important sources of thermal and metallurgical coal in Western Canada. This bulletin provides substantial new information and data on the Kootenay Group in the form of text, isopach maps and cross-sections, and numerous illustrations of lithofacies, lithofacies relationships, age, correlation, rank, distribution and continuity of coal seams, sedimentology, and the major environment of deposition in the Rocky Mountain Foothills and Front Ranges. A regional geological model is presented that will be of assistance in assessing the quality and potential of coal resources in the Kootenay Group in Alberta and British Columbia.

Book Dawn of the Age of Dinosaurs in the American Southwest

Download or read book Dawn of the Age of Dinosaurs in the American Southwest written by Spencer G. Lucas and published by New Mexico Museum of Natural History and Science. This book was released on 1989 with total page 445 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book The Nonmarine Triassic

Download or read book The Nonmarine Triassic written by and published by . This book was released on 1993 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Field Conference

    Field Conference

    Book Details:
  • Author : New Mexico Geological Society
  • Publisher :
  • Release : 2003
  • ISBN :
  • Pages : 444 pages

Download or read book Field Conference written by New Mexico Geological Society and published by . This book was released on 2003 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Geology of the Llano Estacado

Download or read book Geology of the Llano Estacado written by New Mexico Geological Society. Field Conference and published by . This book was released on 2001 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Aspects of Mesozoic Geology and Paleontology of the Colorado Plateau

Download or read book Aspects of Mesozoic Geology and Paleontology of the Colorado Plateau written by Michael Morales and published by . This book was released on 1993 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Bulletin

Download or read book Bulletin written by and published by . This book was released on 1994 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: