Download or read book Sequence Stratigraphy of the Middle Cambrian Marjum Formation written by Douglas David Smith and published by . This book was released on 2007 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Sequence Stratigraphy of the Middle Cambrian Wheeler Formation in the Drum Mountains of West Central Utah written by Loren P. Schneider and published by . This book was released on 2000 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Sequence Stratigraphy and Paleoecology of the Middle Cambrian Spence Shale Member of the Langston Formation of Northeastern Utah and Southeastern Idaho written by Scott H. Wright and published by . This book was released on 1999 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Middle Cambrian Wheeler Formation written by Elizabeth S. Langenburg and published by . This book was released on 2003 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Sequence Stratigraphy and Paleoecology of the Middle Cambrian Spence Shale Member of the Langston Formation of Northeastern Utah and Southeastern Idaho written by Scott H. Wright and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stratigraphic Cyclicity and Mud Mound Formation in Middle Cambrian Marjum Formation House Range Western Utah written by Anna Christine Snider and published by . This book was released on 1999 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sequence Stratigraphy Depositional Environments and Geochemistry of the Middle Cambrian Bloomington Formation in Northern Utah written by Christopher Ryan Jensen and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Bloomington Formation (~425 m thick) is a latest Middle Cambrian (~506.5-505 Ma), mixed, warm water, continental-shelf carbonate and fine-grained siliciclastic unit on the Cordilleran passive margin exposed in northern Utah and southern Idaho. Thicknesses of the Bloomington Formation at Calls Fort Canyon are 111 m in the Hodges Shale Member, 230 m in the middle limestone Member, and 84 m in the Calls Fort Shale Member. The Hodges Shale and Calls Fort Shale Members are shale dominated and represent outer detrital belt deposition. The Logan Canyon outcrop of the Hodges Shale Member shows an environmental change that may represent a transition form an open marine facies into what appears to be a lagoonal facies. The middle limestone member represents shallow marine carbonate deposition on the passive margin shelf. The Bloomington Formation has a low fossil abundance and diversity when compared to correlative units such as the Wheeler and Marjum Formations. There are, however, 10-50 cm thrombolite bioherms, associated with Girvanella oncoliths. These bioherms indicate a shallow-water carbonate facies that experienced a small flooding event that gives the bioherms time and proper conditions to build up. Îþ18O and Îþ13C results both show positive and negative shifts with Îþ13CVPDB values of 1.0 to -4.7 per mil and Îþ18OVSMOW values of -12.9 to -20.8 per mil. A negative Îþ13C excursion in the Hodges Shale may correlate to a similar excursion in the base of the Wheeler Formation that represents the DICE event. Lower and Middle Cambrian Formations in the Wellsville Range have been interpreted as being part of a second order transgressive system and containing third and higher-order cycles. The contact of the Hodges Shale Member and the underlying Blacksmith Dolomite represents a flooding surface and a sequence boundary, followed by a third order cycle. Flooding is indicated by shale deposits that overlie carbonates with a shallowing upward trend. High frequency fourth or fifth order cycles are expressed as laminated shale and thick-bedded limestones as well as thick packages of interbedded, thin limestones and shales. A PCA analysis of thin section point counts indicates that the limestone lithologies of all three members repeat throughout the entire Formation, suggesting cycles of relative sea level rise that cause repeating facies.
Download or read book Stratigraphic Framework of Cambrian and Ordovician Rocks in the Central Appalachian Basin from Medina County Ohio Through Southwestern and South central Pennsylvania to Hampshire County West Virginia written by Robert T. Ryder and published by . This book was released on 1992 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cambrian Stratigraphy and Trilobites of Northwestern Montana written by Charles Frederick Deiss and published by Geological Society of America. This book was released on 1939 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Depositional History Sequence Stratigraphy and Diagenesis of Maryville Limestone Middle Cambrian Southern Appalachians written by Krishnan Srinivasan and published by . This book was released on 1993 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sequence Stratigraphy of the Mid continent written by Norman J. Hyne and published by . This book was released on 1995 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Geology of Stratigraphic Sequences written by Andrew D. Miall and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sequence stratigraphy represents a new paradigm in geology. The principal hypothesis is that stratigraphie successions may be subdivided into discrete sequences bounded by widespread unconformities. There are two parts to this hypothesis. First, it suggests that the driving forces which generate sequences and their bounding unconformities also generate predietable three-dimensional stratigraphies. In re cent years stratigraphie research guided by sequence models has brought about fundamental im provements in our understanding of stratigraphie processes and the controls of basin architecture. Sequence models have provided a powerful framework for mapping and numerieal modeling, enabling the science of stratigraphy to advance with rapid strides. This research has demonstrated the importance of a wide range of processes for the generation of cyclie sequences, including eustasy, tectonics, and orbital forcing of climate change. The main objective of this book is to document the sequence record and to discuss our current state of knowledge about sequence-generating processes.
Download or read book Stratigraphy of the Middle Cambrian Platformal Succession Southern Rocky Mountains written by J. D. Aitken and published by . This book was released on 1997 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 1.3-kilometre-thick, virtually complete Middle Cambrian platformal succession of the southern Rocky Mountains consists of four grand cycles, each beginning with a formation of the inner detrital facies belt and ending with a formation of the middle carbonate facies belt. The first three cycles share a common depositional style and are the main subject of this bulletin. The bulletin provides a comprehensive current analyses of these Middle Cambrian strata and includes abundant basic data including: the classification and understanding of algal/microbial limestones; the recognition and interpretation of large-scale depositional cycles; and the mechanism and history of subsidence of the western continental margin. The bulletin clarifies the existing lithostratigraphic nomenclature. Several new reference sections are designated and nine new members are defined. Data on a network of sections of the platformal facies of the Middle Cambrian are interpreted in terms of modern sedimentological concepts and depositional models.
Download or read book Cambrian Geology and Paleontology written by Charles Doolittle Walcott and published by . This book was released on 1910 with total page 662 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cambrian of SW Wales written by A.J. Rees and published by Geological Society of London. This book was released on 2014-11-25 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Memoir reviews, revises and interprets the biostratigraphy, lithostratigraphy, process sedimentology, palaeoenvironments and sequence stratigraphy of the classic Cambrian succession of SW Wales. This 1250m thick clastic sedimentary succession, of Terreneuvian to Furongian age, was deposited in environments ranging from alluvial fan to mid–outer shelf. Two lithostratigraphical groups are distinguished, each comprising six formations; where possible and appropriate, original and well-known names are retained in harmony with current usage. High-resolution sequence-stratigraphical techniques, constrained by biostratigraphical data whenever possible, allow the revised lithostratigraphy to be integrated with the western Avalonian chronostratigraphy developed in maritime Canada. A twofold subdivision is recognized. Megasequence 1 (sequences 3-7) spans the Terreneuvian, C2 and much of C3, with deposition occurring in an extensional rift-like regime on an epeirogenically active platform. Sequence 8 lies at the base of Megasequence 2, which extends from late C3 into the early Ordovician, and represents passive margin sedimentation.
Download or read book Sequence Stratigraphy in Fine grained Rocks written by Jon R. Schwalbach and published by . This book was released on 1992 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Taphonomy written by Peter A. Allison and published by Springer. This book was released on 2010-11-03 with total page 603 pages. Available in PDF, EPUB and Kindle. Book excerpt: Taphonomic bias is a pervasive feature of the fossil record. A pressing concern, however, is the extent to which taphonomic processes have varied through the ages. It is one thing to work with a biased data set and quite another to work with a bias that has changed with time. This book includes work from both new and established researchers who are using laboratory, field and data-base techniques to characterise and quantify the temporal and spatial variation in taphonomic bias. It may not provide all the answers but it will at least shed light on the right questions.
