John Day Fossil Beds National Monument PDF Download
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Author: Stephen Dow Beckham
Publisher:
ISBN:
Category : John Day Fossil Beds National Monument (Or.)
Languages : en
Pages : 298
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Book Description
Author: Stephen Dow Beckham
Publisher:
ISBN:
Category : John Day Fossil Beds National Monument (Or.)
Languages : en
Pages : 298
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Book Description
Author: Jim E. O'Connor
Publisher: Geological Society of America
ISBN: 0813700159
Category : Science
Languages : en
Pages : 886
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Book Description
"This volume contains guides for 34 geological field trips offered in conjunction with the October 2009 GSA Annual Meeting in Portland, Oregon. Showcasing the region's geological diversity, the peer-reviewed papers included here span topics ranging from accreted terrains and mantle plumes to volcanoes, floods, and vineyard terroir. Locations visited throughout Oregon, Washington, and Idaho encompass Astoria to Zillah. More than just a series of maps, the accompanying descriptions, observations, and conclusions offer new insights to the geologic processes and history of the Pacific Northwest - insights that will inspire readers to put their boots on the evidence as they develop their own understanding of this remarkable and dynamic corner of the world."--Publisher's description.
Author: Donald R. Prothero
Publisher: Columbia University Press
ISBN: 0231127162
Category : Eocene-Oligocene boundary
Languages : en
Pages : 558
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Book Description
The marine Eocene-Oligocene transition of 34 million years ago was a critical turning point in Earth's climatic history, when the warm, high-diversity "greenhouse" world of the early Eocene ceded to the glacial, "icehouse" conditions of the early Oligocene. This book surveys the advances in stratigraphic and paleontological research and isotopic analysis made since 1989 in regard to marine deposits around the world. In particular, it summarizes the high-resolution details of the so-called doubthouse interval (roughly 45 to 34 million years ago), which is critical to testing climatic and evolutionary hypotheses about the Eocene deterioration. The authors' goals are to discuss the latest information concerning climatic and oceanographic change associated with this transition and to examine geographic and taxonomic patterns in biotic turnover that provide clues about where, when, and how fast these environmental changes happened. They address a range of topics, including the tectonic and paleogeographic setting of the Paleogene; specific issues related to the stratigraphy of shelf deposits; advances in recognizing and correlating boundary sections; trends in the expression of climate change; and patterns of faunal and floral turnover. In the process, they produce a valuable synthesis of patterns of change by latitude and environment.
Author: Spencer G. Lucas
Publisher: New Mexico Museum of Natural History and Science
ISBN:
Category : Science
Languages : en
Pages : 227
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Book Description
Author: Herbert William Meyer
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 376
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Book Description
This comprehensive systematic revision of the Bridge Creek flora is based on large collections of megafossil specimens from the John Day and Crooked River basins. The flora was found to be more diverse than previously recognized, with at least 125 species. At least 11 genera are extinct, but the majority are extant members of deciduous forests. The flora was derived from a variety of sources and represents a classic example of the broadleaved deciduous forests that became widespread at mid-latitudes following the Eocene-Oligocene climatic cooling.
Author: University of California (System)
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 376
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Book Description
Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 308
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Book Description
Author: Stephen K. Donovan
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 336
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Book Description
The 'incompleteness of the fossil record' is an excuse used by some scientists to reject any fossil evidence that runs counter to current preconceptions. Adequacy and completeness are difficult concepts that should not be confused. The fossil record may be incomplete, but it is entirely adequate for many and most requirements of palaeontology, as well as answering wider questions in geology and biology. The Adequacy of the Fossil Record is intended to be an up-to-date review that seeks to debunk these and other objections.
Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 582
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Book Description
Author: Elizabeth L. Orr
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 394
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Book Description
Everything you ever wanted to know about fossils in Oregon. Provides the most comprehensive study and thorough summary of all fossil plants, invertebrates, mammals, prehistoric environments, and the workers that contributed to Oregon's rich geologic history. Contains illustrations of extinct animals and plants, numerous photos, maps and charts.
