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Calcareous Nannofossil Biostratigraphy Of The Early Miocene To Middle Eocene Interval 2790 M To Td
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Book Synopsis Calcareous Nannofossil Biostratigraphy of the Early Miocene to Middle Eocene Interval 2790 M to TD by : David Waghorn
Download or read book Calcareous Nannofossil Biostratigraphy of the Early Miocene to Middle Eocene Interval 2790 M to TD written by David Waghorn and published by . This book was released on 1997 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Calcareous Nannofossil Biostratigraphy of the Early Miocene to Middle Eocene Interval by : David Waghorn
Download or read book Calcareous Nannofossil Biostratigraphy of the Early Miocene to Middle Eocene Interval written by David Waghorn and published by . This book was released on 1997 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evolutionary, Biostratigraphic, and Taxonomic Study of Calcareous Nannofossils from a Continuous Paleocene-Eocene Boundary Section in New Jersey by : Laurel M. Bybell
Download or read book Evolutionary, Biostratigraphic, and Taxonomic Study of Calcareous Nannofossils from a Continuous Paleocene-Eocene Boundary Section in New Jersey written by Laurel M. Bybell and published by . This book was released on 1994 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: Calcareous nannofossils were examined from upper Paleocene and lower Eocene marine sediments from six coreholes that were drilled in southern New Jersey ; microfossil data from New Jersey were compared to and were found to be consistent with material examined from the Atlantic Coastal Plain of Alabama, Maryland and Virginia ; the biostratigraphic and lithostratigraphic data indicate continuous deposition across the Paleocene-Eocene boundary in this part of New Jersey.
Book Synopsis Integrated Micropaleontology of the Waihapa-1 and Toko-1 Wells, Onshore Taranaki, New Zealand by : H. E. G. Morgans
Download or read book Integrated Micropaleontology of the Waihapa-1 and Toko-1 Wells, Onshore Taranaki, New Zealand written by H. E. G. Morgans and published by . This book was released on 1999 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Latest Oligocene to early middle Miocene quantitative calcareous nannofossil biostratigraphy in the Mediterranean region by : Eliana Fornaciari
Download or read book Latest Oligocene to early middle Miocene quantitative calcareous nannofossil biostratigraphy in the Mediterranean region written by Eliana Fornaciari and published by . This book was released on 1996 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evolutionary, Biostratigraphic, and Taxonomic Study of Calcareous Nannofossils from a Continuous Paleocene-Eocene Boundary Section in New Jersey by : Laurel M. Bybell
Download or read book Evolutionary, Biostratigraphic, and Taxonomic Study of Calcareous Nannofossils from a Continuous Paleocene-Eocene Boundary Section in New Jersey written by Laurel M. Bybell and published by . This book was released on 1994 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Utilizing Indian Ocean Calcareous Nannofossil Biostratigraphy of Miocene Sediments to Investigate Tectonic and Climatic Forcing During the Evolution of the Himalayas by : Jarrett W. Cruz
Download or read book Utilizing Indian Ocean Calcareous Nannofossil Biostratigraphy of Miocene Sediments to Investigate Tectonic and Climatic Forcing During the Evolution of the Himalayas written by Jarrett W. Cruz and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The geological history of Himalayans and Tibetan Plateau is important for understanding how our planet evolves, and how geological structures can have local and global effects on climate and floral and faunal evolution of a system. This thesis presents how biostratigraphy of calcareous nannofossils can be a vital tool when attempting to identify timing of sedimentological events captured within cores recovered from deep below the ocean floor. Here I utilize nannofossil biostratigraphy from International Ocean Discovery Program Expedition 354 Sites 1451 and 1450 drilled in the Eastern Bengal Fan to investigate the paleogeographic setting and evolution of the Himalayans. This is done by linking autogenetic characteristics of calcareous nannofossils to allogenic and autogenic processes directed by tectonic and climatic forcing. More specifically, this study uses biostratigraphy to identify nannofossils observed in sediments collected to produce a data set for assigning a biostratigraphic zonal scheme. The biostratigraphy is used as a baseline for calculating sedimentation rates and errors, relate sedimentation rates and turbidite frequencies to tectonic and climatic forcing and understanding the paleo environment. Biostratigraphy is a vital tool for identifying events directed by tectonic and climatic forcing and in turn, to test and support or reject other groups of researchers' hypotheses. Expedition 354 Site 1451 was successful at recording nannofossil markers from the Holocene (0 Ma) to the Miocene-Oligocene boundary (23 Ma). The Gradstein and others (2012) Time Scale was utilized to assign ages to the Martini (1971) and Okada and Bukry (1980) nannofossil zonal schemes. Sixty-one biostratigraphic events assigned by sixty-five marker species were observed delineating sixty-one zones/subzones discussed herein. The ages range from recently deposited (Holocene) to older than 57.4 million years (Paleogene). I utilize the biostratigraphic ages to analyze seven events representing pulses in turbiditic activity throughout the Miocene. Once the events were outlined, I compared each one to proposed tectonic and climatic events outlined in current published research in order to see whether they can be supported or rejected. Three of these events indicate the influence of significant tectonic forcing displaying nearly double the average sedimentation rate. The first event occurred around 6.1-8.2 Ma in the central Himalayans and has a strong source signal from the Ganges river system. The second and third events occurred around 8.3-10.9 Ma in the Eastern Tibetan Plateau and projects a strong source signal from the Brahmaputra river system. The fourth and fifth events can be linked to a monsoon activity and occurred around 10.8-13.5 Ma. The sixth event occurred around 14.1-14.91 Ma during the Middle Miocene cooling event and may have been influenced by a long-term sea level low. The seventh event occurred around 15.80-17.95 Ma during the Early to Middle Miocene climate optimum during a long-term sea level high. Site 1451 Holes A and B were drilled from sea floor to 1181.3 m below the sea floor with 86% recovery from Hole A and 29% recovery from hole B resulting in 628.9 m of total sediment collected. There were 245.1 meters of turbiditic sediment identified within the cores. This accounts for 38.9% of the total collected sediment. The lowermost turbidite sequence is assigned an age range of 15.80 to 17.95 Ma. Radiolarian blooms are identified in 18.2 m of sediment before any recorded turbidites. There are 5.47 m of volcanic ash layers denoting 8 identifiable volcanic events. There were also 40.85 m of plant fragment inclusions observed within the cores. These plant fragment inclusions were deposited between 0.29-1.26 Ma and 8.68+ Ma, leaving a gap in plant-fragment inclusions from 1.26-8.68 Ma. The commencement of significant plant fragment deposition correlates with the onset of the monsoons and activity of crustal thickening around 15-18 million years ago. In order to get a better understanding of the variation in depositional characteristics, 125 post cruise samples were analyzed from Site 1450 to correlate Pleistocene and Pliocene depositional patterns to Site 1451. Site 1450 biostratigraphy highlights a more expanded Pleistocene and Pliocene sections than Site 1451 with different sedimentation rates during the Pliocene/Pleistocene interval. This analysis highlights the variation in depositional characteristics from the two locations across the Bengal Fan head and hints to a possible reorganization of depositional patterns from source river systems around 5 Ma. This research has increased the resolution of proposed tectonic and climatic forcing events during the evolution of the Himalayan and Tibetan Plateau. Tectonic uplift in the central Himalayas initiated around 7.42+ Ma, and around 9.69-10.97 Ma in the Tibetan Plateau. Climatic forcing occurred around 14.91 to 15.8 Ma, altering sedimentation patterns in the Indian Ocean. Onset of turbidite deposition at site 1451 around 15.8 to 17.95 Ma confirms Early Miocene evolution of the Himalayas.
Book Synopsis Calcareous Nannofossil Records of Miocene Sea Level at the Marion Plateau (South Eastern Australia) and the Pliocene-Pliestocene Formation of Cold Water Carbonate Mounds (North Eastern Atlantic Continental Margin) by : Emily Browning
Download or read book Calcareous Nannofossil Records of Miocene Sea Level at the Marion Plateau (South Eastern Australia) and the Pliocene-Pliestocene Formation of Cold Water Carbonate Mounds (North Eastern Atlantic Continental Margin) written by Emily Browning and published by . This book was released on 2012 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt: The revised age models for the upper Oligocene to middle Miocene interval of the Marion Plateau have been used to identify eleven sequence boundaries and sequences sets at the Marion Plateau; MSA1.2 (23.1 Ma), MSA1.4 (22.1 Ma), MSA2.1 (21.2 Ma), MSB1.1 (18.4 Ma), MSB1.2 (17.3 Ma), MSB2.1 (16.5 Ma), MSB2.2 (15.6 Ma), MSB2.3 (14.8 Ma), MSB3.1 (13.6 Ma), MSB3.2 (12.9 Ma), and MSB3.3 (11.8 Ma). The complementary Miocene oxygen isotope events Mi1, Mi1a, Mi1aa, Mi2, Mi2b, Mi3a, Mi3, Mi4, Mi5a, Mi5, and Mi6 are recognized in the Marion Plateau sequences. In addition correlation to sequences on the New Jersey margin, the Gulf of Papua, Great Australian Bight, and McMurdo Sound Antarctica indicate that these sequences are controlled by glacio-eustasy, primarily the increase of ice volume on Antarctica. Changes in the preservation, assemblage structure and diversity of calcareous nannofossils as well as %planktic foraminifera, %neritics coincide with transgressive phases and sequence boundaries. The principles of 'highstand shedding' are illustrated at the Marion Plateau by enhanced preservation of calcareous nannofossil, deposition of glauconite, unconformities and condensed intervals associated with early to middle Miocene sequence boundaries. Variations in surface water nutrient and temperature conditions at the Marion Plateau throughout the Miocene coincide with climatic events of the early Miocene (23 - 17 Ma), the Middle Miocene Climatic Optimum (17.6 - 15.4 Ma), and Middle Miocene Climatic Transition (14.8 - 13.8 Ma), and the stepwise growth of ice sheets on Antarctica. Calcareous nannofossil communities show evidence for precessional and eccentricity orbital forcing during the Middle Miocene Climatic Optimum, as well as a significantly cooler surface water mass at the Marion Plateau coinciding with the onset of the Middle Miocene Climatic Transition and Mi3a (14.8 Ma) glacial event. Changes in surface water fertility and temperature during the Middle Miocene Climatic Optimum agree with other studies that posit growth of significant ice volume on Antarctica starting as early as ~17.35 Ma. Further evidence for significant cooling at the Mi3a (14.8 Ma) glacial event agrees with studies suggesting a step-wise cooling for the formation of a semi- permanent Antarctic ice sheet and thermohaline circulation, starting first at 14.8 Ma (Mi3a) and intensifying at 13.9 Ma (Mi3).
Book Synopsis Bibliography and Index of Micropaleontology by :
Download or read book Bibliography and Index of Micropaleontology written by and published by . This book was released on 2000 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Biostratigraphy and Comparison of Paleocene to Lower Eocene Calcareous Nannofossils from Broken Ridge and Ninety-East Ridge by : Hana Terese Millen
Download or read book Biostratigraphy and Comparison of Paleocene to Lower Eocene Calcareous Nannofossils from Broken Ridge and Ninety-East Ridge written by Hana Terese Millen and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: Ocean Drilling Program Site 752 on Broken Ridge in the Indian Ocean recovered an expanded section containing Paleocene and lower Eocene calcareous nannofossils. Qualitative counts show a diverse, high-latitude assemblage of primarily moderately preserved and abundant nannofossils. The assemblage was deposited in the high southern latitudes before Broken Ridge rifted off of the Kerguelen Plateau in the middle Eocene. Minor modifications allowed Okada and Bukry's 1980 low-latitude zonation to be utilized at this site for Zones CP1a through CP10. Various markers such as the first occurrence of Discoaster diastypus and Tribrachiatus bramlettei, or the last occurrence of Fasciculithus sp., were used in past studies to determine the Paleocene/Eocene boundary. At this high-latitude site, both D. diastypus and T. bramlettei are rare or absent, so the last occurrence of Fasciculithus sp. was used to approximate the boundary. Ocean Drilling Program Site 758 cored the northern Ninety-East Ridge in the Indian Ocean. Ninety-East Ridge is a hotspot trace formed from the northward movement of the Indo-Australian Plate. This site contains a more condensed section in which much of the lower Paleocene and all of the lower Eocene are absent. A more generically diverse, but still high-latitude assemblage of nannofossils is examined in this study. First seen in Zone CP6, a large variety of Discoaster okadai is present at Site 758. Figures are presented to show the variation in morphology of this species in the Indian Ocean. Much research has been done to associate Paleogene nannofossil genera with different paleoceonographic conditions. Both Sites 752 and 758 show a shift from primarily small, cool-water, eutrophic species near the K/T boundary (such as Prinsius martinii, Prinsius dimorphosus, or Cruciplacolithus primus) to warm-water, oligotrophic species (such as Sphenolithus, Discoaster, or Zygrhablithus bijugatus). This trend is seen in Principal Component Analysis and is more obvious at Site 752 due to the presence of a complete lower Paleocene section and lower Eocene nannofossils.
Book Synopsis A Biostratigraphic and Biogeographic Analysis of the Global Distribution of Calcareous Nannofossils from the Early and Middle Miocene by : John C. Steinmetz
Download or read book A Biostratigraphic and Biogeographic Analysis of the Global Distribution of Calcareous Nannofossils from the Early and Middle Miocene written by John C. Steinmetz and published by . This book was released on 1978 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis International Code of Phylogenetic Nomenclature (PhyloCode) by : Kevin de Queiroz
Download or read book International Code of Phylogenetic Nomenclature (PhyloCode) written by Kevin de Queiroz and published by CRC Press. This book was released on 2020-04-29 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt: The PhyloCode is a set of principles, rules, and recommendations governing phylogenetic nomenclature, a system for naming taxa by explicit reference to phylogeny. In contrast, the current botanical, zoological, and bacteriological codes define taxa by reference to taxonomic ranks (e.g., family, genus) and types. This code will govern the names of clades; species names will still be governed by traditional codes. The PhyloCode is designed so that it can be used concurrently with the rank-based codes. It is not meant to replace existing names but to provide an alternative system for governing the application of both existing and newly proposed names. Key Features Provides clear regulations for naming clades Based on expressly phylogenetic principles Complements existing codes of nomenclature Eliminates the reliance on taxonomic ranks in favor of phylogenetic relationships Related Titles: Rieppel, O. Phylogenetic Systematics: Haeckel to Hennig (ISBN 978-1-4987-5488-0) de Queiroz, K., Cantino, P. D. and Gauthier, J. A. Phylonyms: A Companion to the PhyloCode (ISBN 978-1-138-33293-5).
Book Synopsis Journal of Research of the U.S. Geological Survey by : Geological Survey (U.S.)
Download or read book Journal of Research of the U.S. Geological Survey written by Geological Survey (U.S.) and published by . This book was released on 1978 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scientific notes and summaries of investigations in geology, hydrology, and related fields.
Book Synopsis The Geology of Egypt by : Zakaria Hamimi
Download or read book The Geology of Egypt written by Zakaria Hamimi and published by Springer Nature. This book was released on 2019-09-19 with total page 711 pages. Available in PDF, EPUB and Kindle. Book excerpt: This richly illustrated book offers a concise overview of the geology of Egypt in the context of the geology of the Arab Region and Northeast Africa. An introductory chapter on history of geological research in Egypt sheds much light on the stages before and after the establishment of Egyptian Geological Survey (the second oldest geological survey worldwide), Hume's book and Said's 1962, 1990 books. The book starts with the Precambrian geology of Egypt, in terms of lithostratigraphy and classifications, structural and tectonic framework, crustal evolution and metamorphic belts. A dedicated chapter discusses the Paleozoic-Mesozoic-Cenozoic tectonics and structural evolution of Egypt. A chapter highlights the Red Sea tectonics and the Gulf of Suez and Gulf of Aqaba Rifts. Subsequent chapters address the Phanerozoic geology from Paleozoic to Quaternary. The Egyptian Impact Crater(s) and Meteorites are dealt with in a separate chapter. The Earth resources in Egypt, including metallic and non-metallic ore deposits, hydrocarbon and water resources, are given much more attention throughout four chapters. The last chapter addresses the seismicity, seismotectonics and neotectonics of Egypt.
Book Synopsis Atlas of Benthic Foraminifera by : Ann Holbourn
Download or read book Atlas of Benthic Foraminifera written by Ann Holbourn and published by John Wiley & Sons. This book was released on 2013-04-03 with total page 1115 pages. Available in PDF, EPUB and Kindle. Book excerpt: An up-to-date atlas of an important fossil and living group, with the Natural History Museum. Deep-sea benthic foraminifera have played a central role in biostratigraphic, paleoecological, and paleoceanographical research for over a century. These single–celled marine protists are important because of their geographic ubiquity, distinction morphologies and rapid evolutionary rates, their abundance and diversity deep–sea sediments, and because of their utility as indicators of environmental conditions both at and below the sediment–water interface. In addition, stable isotopic data obtained from deep–sea benthic foraminiferal tests provide paleoceanographers with environmental information that is proving to be of major significance in studies of global climatic change. This work collects together, for the first time, new morphological descriptions, taxonomic placements, stratigraphic occurrence data, geographical distribution summaries, and palaeoecological information, along with state-of-the-art colour photomicrographs (most taken in reflected light, just as you would see them using light microscopy), of 300 common deep-sea benthic foraminifera species spanning the interval from Jurassic - Recent. This volume is intended as a reference and research resource for post-graduate students in micropalaeontology, geological professionals (stratigraphers, paleontologists, paleoecologists, palaeoceanographers), taxonomists, and evolutionary (paleo)biologists.
Book Synopsis Natural Radioactive Disequilibrium of the Uranium Series by : John Nicholas Rosholt
Download or read book Natural Radioactive Disequilibrium of the Uranium Series written by John Nicholas Rosholt and published by . This book was released on 1959 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report concerns work done on behalf of the U.S. Atomic Energy Commission and is published with the permission of the Commission.
Book Synopsis Plankton Stratigraphy: Volume 2, Radiolaria, Diatoms, Silicoflagellates, Dinoflagellates and Ichthyoliths by : Hans M. Bolli
Download or read book Plankton Stratigraphy: Volume 2, Radiolaria, Diatoms, Silicoflagellates, Dinoflagellates and Ichthyoliths written by Hans M. Bolli and published by CUP Archive. This book was released on 1989-05-25 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive synthesis of our knowledge of the biostratigraphy of marine plankton is the work of an international team of eighteen authors. It covers all the major fossil groups that can be used to date sediments and rocks in the time interval Late Mesozoic to Holocene. Altogether more than 3200 taxa are considered, almost all of which are illustrated and depicted on range charts, making the book a valuable work of reference in the earth sciences. For ease of reference by specialists interested in either calcareous or non-calcareous microfossils, the original work is now divided into two independent volumes. Volume 2 describes siliceous and other non-calcareous microfossils, covering radiolaria, diatoms, silicoflagellates, dinoflagellates and ichthyoliths.
