Author: J. H. McGowenPublisher:
ISBN:
Category : Dockum Group
Languages : en
Pages : 60
Book Description
Depositional Framework of the Lower Dockum Group (Triassic), Texas Panhandle
Author: J. H. McGowenPublisher:
ISBN:
Category : Dockum Group
Languages : en
Pages : 60
Book Description
Depositional Framework of the Lower Dockum Group (Triassic), Texas Panhandle
Author: J. H. McGowenPublisher:
ISBN:
Category : Dockum Group
Languages : en
Pages : 60
Book Description
Depositional Environments, Sedimentology, and Stratigraphy of the Dockum Group (Triassic) in the Texas Panhandle
Author: Brent A. MayPublisher:
ISBN:
Category : Dockum Formation
Languages : en
Pages : 360
Book Description
Genetic Stratigraphy of the Dockum Group (Triassic), Palo Duro Canyon, Panhandle, Texas
Author: Steven J. SeniPublisher:
ISBN:
Category : Geology
Languages : en
Pages : 350
Book Description
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.
The Nonmarine Triassic
Author: Spencer G. LucasPublisher: New Mexico Museum of Natural History and Science
ISBN:
Category :
Languages : en
Pages : 522
Book Description
Terrestrial Depositional Systems
Author: Kate E. ZeiglerPublisher: Elsevier
ISBN: 0128032448
Category : Science
Languages : en
Pages : 362
Book Description
Terrestrial Depositional Systems: Deciphering Complexities through Multiple Stratigraphic Methods is the first collection of contributed articles that not only introduces young geoscientists to biostratigraphy, chemostratigraphy, magnetostratigraphy, and lithostratigraphy, but also provides seasoned practitioners with a standard reference that showcases the topic's most recent developments in research and application. When studying complex depositional systems, scientists often need to rely on more than one stratigraphic technique to truly understand the sequence of historical events. Through a blend of specific analytical techniques, experiments, sampling methods, and working examples, this book provides a practical reference for addressing a range of depositional system challenges. This multi-contributed reference combines reviews of stratigraphic methods with individual case studies, providing readers with a broad scope of techniques that will aid their work in the interpretation and understanding of complex depositional systems. - Offers multi-contributed expertise in biostratigraphy, chemostratigraphy, magnetostratigraphy, and lithostratigraphy, ensuring a thorough, yet topical coverage - Features case studies in each chapter that underscore the range of applications of individual stratigraphic methods - Provides detailed explanations of different analyses, data collection methods, and sampling techniques, making the content immediately implementable - Includes more than 100 illustrations, figures, and photographs that provide visual representations of core concepts
ROTTEN HILL: A LATE TRIASSIC BONEBED IN THE TEXAS PANHANDLE, USA
Author: Spencer G. LucasPublisher: New Mexico Museum of Natural History and Science
ISBN:
Category : Amphibians, Fossil
Languages : en
Pages : 105
Book Description
Lake margin depositional systems of the Dockum Group (Upper Triassic) in Tule Canyon, Texas Panhandle
Author: John Lawrence BoonePublisher:
ISBN:
Category : Geology
Languages : en
Pages : 294
Book Description
Hydrogeochemistry and Water Resources of the Triassic Lower Dockum Group in the Texas Panhandle and Eastern New Mexico
Author: Alan R. DuttonPublisher:
ISBN:
Category : Aquifers
Languages : en
Pages : 60
Book Description
Area Geological Characterization Report for the Palo Duro and Dalhart Basins, Texas
Author: Stone and Webster Engineering CorporationPublisher:
ISBN:
Category : Geological surveys
Languages : en
Pages : 396
Book Description