The Lower Triassic System in the Abrek Bay Area, South Primorye, Russia PDF Download

Author: Yasunari Shigeta
Publisher:
ISBN:
Category : Fossils
Languages : en
Pages : 232

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Author: Lawrence H. Tanner
Publisher: New Mexico Museum of Natural History and Science
ISBN:
Category : Geology, Stratigraphic
Languages : en
Pages : 621

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Book Description

Author: David Ware
Publisher: John Wiley & Sons
ISBN: 1119522870
Category : Science
Languages : en
Pages : 245

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Book Description
Fossils and Strata is an international series of monographs and memoirs in palaeontology and biostratigraphy, owned by, and published on behalf of, The Lethaia Foundation in cooperation between the Scandinavian countries. Fossils and Strata forms part of the same structured publishing programme as the international journal Lethaia and provides a complementary outlet for more comprehensive systematic and regional monographs, including taxonomic descriptions. Fossils and Strata also offers the publication of thematic special issues comprising a series of shorter contributions.

Author: JAMES F. JENKS
Publisher: New Mexico Museum of Natural History and Science
ISBN:
Category : Ammonoidea
Languages : en
Pages : 185

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Author: Spencer G. Lucas
Publisher: Geological Society of London
ISBN: 9781862392960
Category : Science
Languages : en
Pages : 528

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Book Description
The Mesozoic Era begins with the approximately 50-million-year-long Triassic Period, a major juncture in Earth history when the vast Pangaean supercontinent completed its assembly and began its fragmentation, and the global biota diversified and modern-ized after the end-Permian mass extinction, the most extensive biotic decimation of the Phanerozoic. The temporal ordering of geological and biotic events during Triassic time thus is critical to the interpretation of some unique and pivotal events in Earth his-tory. This temporal ordering is mostly based on the Triassic time-scale, which has been developed and refined for nearly two centu-ries. This book reviews the state of the art of the Triassic timescale and includes comprehensive analyses of Triassic radio-isotopic ages, magnetostratigraphy, isotope-based and cyclostratigraphic correlations and timescale -relevant marine and non-marine bio-stratigraphy.

Author: James F. Jenks
Publisher: New Mexico Museum of Natural History and Science
ISBN:
Category :
Languages : en
Pages : 48

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Author: Christian Klug
Publisher: Springer
ISBN: 9401796335
Category : Science
Languages : en
Pages : 615

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​This two-volume work is a testament to the abiding interest and human fascination with ammonites. We offer a new model to explain the morphogenesis of septa and the shell, we explore their habitats by the content of stable isotopes in their shells, we discuss the origin and later evolution of this important clade, and we deliver hypotheses on its demise. The Ammonoidea produced a great number of species that can be used in biostratigraphy and possibly, this is the macrofossil group, which has been used the most for that purpose. Nevertheless, many aspects of their anatomy, mode of life, development or paleobiogeographic distribution are still poorly known. Themes treated are biostratigraphy, paleoecology, paleoenvironment, paleobiogeography, evolution, phylogeny, and ontogeny. Advances such as an explosion of new information about ammonites, new technologies such as isotopic analysis, tomography and virtual paleontology in general, as well as continuous discovery of new fossil finds have given us the opportunity to present a comprehensive and timely "state of the art" compilation. Moreover, it also points the way for future studies to further enhance our understanding of this endlessly fascinating group of organisms.

Author: Jean Guex
Publisher: Springer Nature
ISBN: 3030472795
Category : Science
Languages : en
Pages : 319

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Book Description
It is widely acknowledged that life has adapted to its environment, but the precise mechanism remains unknown since Natural Selection, Descent with Modification and Survival of the Fittest are metaphors that cannot be scientifically tested. In this unique text, invertebrate and vertebrate biologists illuminate the effects of physiologic stress on epigenetic responses in the process of evolutionary adaptation from unicellular organisms to invertebrates and vertebrates, respectively. This book offers a novel perspective on the mechanisms underlying evolution. Capacities for morphologic alterations and epigenetic adaptations subject to environmental stresses are demonstrated in both unicellular and multicellular organisms. Furthermore, the underlying cellular-molecular mechanisms that mediate stress for adaptation will be elucidated wherever possible. These include examples of ‘reverse evolution’ by Professor Guex for Ammonites and for mammals by Professor Torday and Dr. Miller. This provides empiric evidence that the conventional way of thinking about evolution as unidirectional is incorrect, leaving open the possibility that it is determined by cell-cell interactions, not sexual selection and reproductive strategy. Rather, the process of evolution can be productively traced through the conservation of an identifiable set of First Principles of Physiology that began with the unicellular form and have been consistently maintained, as reflected by the return to the unicellular state over the course of the life cycle.

Author: JAMES F. JENKS
Publisher: New Mexico Museum of Natural History and Science
ISBN:
Category : Science
Languages : en
Pages : 23

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Book Description

Author: Yasunari Shigeta
Publisher:
ISBN:
Category : Fossils
Languages : en
Pages : 324

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Book Description