Author: Xiumian Hu
Publisher: SEPM Soc for Sed Geology
ISBN: 1565761359
Category : Science
Languages : en
Pages : 266

Get Book Here

Book Description

Author: Luigi Jovane
Publisher: Geological Society of London
ISBN: 1862393540
Category : Science
Languages : en
Pages : 399

Get Book Here

Book Description
Magnetostratigraphy is best known as a technique that employs correlation among different stratigraphic sections using the magnetic directions defining geomagnetic polarity reversals as marker horizons. The ages of the polarity reversals provide common tie points among the sections, allowing accurate time correlation. Recently, studies of magnetic methods and the timing of geological processes have acquired a broader meaning, now referring to many types of magnetic measurements within a stratigraphic sequence. Many of these measurements provide correlation and age control not only for the older and younger boundaries of a polarity interval, but also within intervals. Thus, magnetostratigraphy no longer represents a dating tool based only on geomagnetic polarity reversals, but comprises a set of techniques that includes measurements of geomagnetic field parameters, environmental magnetism, rock-magnetic properties, radiometric dating and astronomically forced palaeoclimatic change recorded in sedimentary rocks, and key corrections to magnetic directions related to geodynamics, palaeocurrents, tectonics and diagenetic processes --

Author: A.-V. Bojar
Publisher: Geological Society of London
ISBN: 1862393648
Category : Science
Languages : en
Pages : 223

Get Book Here

Book Description
Isotopic studies combined with geochemical, lithological, mineralogical and palaeontological investigations have been widely used in reconstructing Cretaceous marine and continental environments. Furthermore stable and radiogenic isotope trends play an important role in the interpretation of the causes and consequences of biotic turnovers at stratigraphic boundaries as well as in global correlations.

Author: M. Wagreich
Publisher: Geological Society of London
ISBN: 1786204746
Category : Science
Languages : en
Pages : 269

Get Book Here

Book Description
Sea-level constitutes a critical planetary boundary for geological processes and human life. Sea-level fluctuations during major greenhouse phases are still enigmatic and strongly discussed in terms of changing climate systems. The geological record of the Cretaceous greenhouse period provides a deep-time view on greenhouse-phase Earthsystem processes that facilitates a much better understanding of the causes and consequences of global, geologically short-term, sea-level changes. In particualr, Cretaceous hothouse periods can serve as a laboratory to better understand a near-future greenhouse Earth. This volume presents high-resolution sea-level records from globally distributed sedimentary archives of the Cretaceous involving a large group of scientists from the International Geoscience Programme IGCP 609. Marine to non-marine sedimentary successions were analysed for revised age constraints, the correlation of global palaeoclimate shifts and sea-level changes, tested for climate-driven cyclicities, and correlated within a high-resolution stratigraphic framework of the Geological Timescale. For hothouse periods, the hypothesis of significant global groundwater-related sea-level change, i.e. aquifer-eustasy as a major process, is reviewed and substantiated.

Author: Xiumian Hu
Publisher: Springer Nature
ISBN: 9819969360
Category :
Languages : en
Pages : 999

Get Book Here

Book Description

Author: Marco Menichetti
Publisher: Geological Society of America
ISBN: 0813725240
Category : Science
Languages : en
Pages : 188

Get Book Here

Book Description
Since the beginning of the last century, the lower Jurassic to mid-Miocene pelagic succession exposed along the valleys of the Umbria and Marche Apennines of Italy represented a fertile playground for generations of earth scientists. This GSA Special Paper provides a reappraisal of the geological and integrated stratigraphic research, which was carried out by scores of earth scientists in the gorges around the medieval city of Gubbio over the past fifty years. Following review chapters about pioneering sedimentologic, biostratigraphic, and magnetostratigraphic studies of the Gubbio sections, a series of papers presents new, original data addressing different stratigraphical, paleoenvironmental, and structural geological aspects of particular Cretaceous to Paleogene intervals, including the still much-debated K-Pg Boundary Event in the worldwide famous site of the Bottaccione Gorge, where the Alvarez theory of global mass extinction caused by a catastrophic extraterrestrial impact was born in 1980.

Author: Chengshan Wang
Publisher: Elsevier
ISBN: 0128129298
Category : Science
Languages : en
Pages : 719

Get Book Here

Book Description
Continental Scientific Drilling Project of the Cretaceous Songliao Basin (SK-1) in China is the first reference to provide the results of the first part of scientific drilling project at the Songliao Basin in the Daqing oil field, the largest known oil field in China. The project has two major objectives: one is to correlate the oceanic and continental records and determine the principal drivers of climate change in order to assist in future climate change predictions and its influence on the earth's environment. The second is to further test the theory of terrestrial genesis of hydrocarbons, and to explore the formation of intra-continental sedimentary basins, as many are major hydrocarbon provinces. In addition, this project provides the scientific basis for exploration of the Daqing Oilfields, which have a yearly production of forty million tons of oil. The world is entering a new exciting era to explore in which scientific drilling will provide a quantum leap in our understanding of its deep earth and history. Continental Scientific Drilling Project of the Cretaceous Songliao Basin (SK-1) in China will play an important role in promoting scientific drilling and earth system science research. - Summarizes the geological background, seismic profile, and tectonic evolution of the Songliao Basin - Provides detailed information on drilling technology of SK-1, which successfully obtained ~2500m core with a recovery rate of ~95% - Includes detailed core information: stratigraphic charts, core photographs, and core photograph identification tables

Author: Clive R. Neal
Publisher: Geological Society of America
ISBN: 0813725119
Category : Nature
Languages : en
Pages : 352

Get Book Here

Book Description
The origin, evolution, and environmental impact of large igneous provinces (LIPs) represents a topic of high scientific importance because the magmatism associated with these features cannot be directly related to plate tectonics, and because the eruption of flood basalts may have global environmental consequences. Oceanic LIPs are even more poorly understood due to their relative inaccessibility. This volume takes a multidisciplinary approach to understanding LIP origin, evolution, and environmental impact in ocean basins. Papers that focus on plate tectonic reconstructions, petrologic and geophysical investigations of various LIPs, and sedimentological and micropaleontological evidence of syn-LIP sediments are presented. Precious materials and data from dredging cruises and scientific ocean drilling expeditions have made this volume possible.

Author: P.K. Kathal
Publisher: Scientific Publishers
ISBN: 9387869768
Category : Science
Languages : en
Pages : 364

Get Book Here

Book Description
The book is designed to cover the recent researches carried-out by the scholars from across the world. It covers aspects related to Foraminifera, in biostratigraphy and paleoecology, isotopic studies, applicability as bio-indicators in pollution studies, taxonomy of Indo-Pacific assemblages, studies of history of ocean bottom oxygenation and experimental studies; Radiolaria from Antarctic Ocean; Microbalites including Diatoms in studying threats and conservation issues in salt lakes of Western Australia; Ostracoda from freshwater, marginal marine ecosystems from Andaman and Nicobar islands; Coralline-algae from late Eocene rocks of Meghalaya; Zygnematalean algae from across the Permian-Triassic boundary; and Microstructures of egg-shells of vertebrates showing paleobiologic links across the continents. It will serve the postgraduate students choosing Geology as well as researchers in the field of Micropaleontology.

Author: M. Sosson,
Publisher: Geological Society of London
ISBN: 1862397392
Category : Science
Languages : en
Pages : 370

Get Book Here

Book Description
The fifteen chapters included in this volume are concerned with the main issues in the Eastern Black sea and Caucasus regions of the Alpine–Tethyan orogenic realm, which are: (1) the changes in space and time of geodynamic processes responsible for the closure of the northern branch of the Neotethys Ocean and how these changes are related to the opening and inversion of back-arc basins; (2) the northwestern terminus of the Eastern Black sea rift; (3) timing and evolution of inverted and foreland basins; (4) the continuity of structures and their evolution in time between the Eastern Black Sea, the Greater Caucasus, the Lesser Caucasus and those of the Taurides–Anatolides– Pontides belt and of NW Iran; and (5) Paratethys evolution since the Eocene in this belt. The papers included in this volume present new results obtained mostly by projects supported by the DARIUS programme.