The Miocene Purple Mountain Flora of Western Nevada
The Miocene Purple Mountain Flora of Western Nevada

Author: Daniel I. Axelrod

Publisher: Univ of California Press

Published: 1995-01-01

Total Pages: 120

ISBN-13: 9780520097971

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In this study, nine florules from the Chloropagus Formation near Fernley, Nevada, are dated at 14.7-13.4 million years. The author finds that dominant mixed conifer forest and sclerophyll woodland species of the Sierra Nevada-Klamath region replaced exotic deciduous hardwoods in the two lowest sites. He concludes that this change reflects the loss of adequate summer rain as upwelling from a colder ocean resulted from spreading East Antarctic ice.

Stratigraphy and Paleolimnology of the Green River Formation, Western USA
Stratigraphy and Paleolimnology of the Green River Formation, Western USA

Author: Michael Elliot Smith

Publisher: Springer

Published: 2015-07-02

Total Pages: 359

ISBN-13: 9401799067

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This volume presents a suite of detailed stratigraphic and sedimentologic investigations of the Eocene Green River Formation of Wyoming, Colorado and Utah, one of the world’s foremost terrestrial archives of lacustrine and alluvial deposition during the warmest portion of the early Cenozoic. Its twelve chapters encompass the rich and varied record of lacustrine stratigraphy, sedimentology, geochronology, geochemistry and paleontology. Chapters 2-9 provide detailed member-scale synthesis of Green River Formation strata within the Greater Green River, Fossil, Piceance Creek and Uinta Basins, while its final two chapters address its enigmatic evaporite deposits and ichnofossils at broad, interbasinal scale.

The Eocene Thunder Mountain Flora of Central Idaho
The Eocene Thunder Mountain Flora of Central Idaho

Author: Daniel I. Axelrod

Publisher: Univ of California Press

Published: 1998-03-17

Total Pages: 108

ISBN-13: 9780520098237

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An Eocene (45 Ma) flora from Thunder Mountain caldera shows that montane conifer forest species from upper slopes descended to interfinger with mixed conifer-deciduous hardwood forest on the caldera floor then near 1700 m. Most species are allied to those in the western United States, but a few genera are in China. Precipitation was near 100 cm yearly, with most in summer.

Palaeoclimates and their Modelling
Palaeoclimates and their Modelling

Author: J.R.L. Allen

Publisher: Springer Science & Business Media

Published: 2012-12-06

Total Pages: 326

ISBN-13: 9401112541

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The climate of the Earth has undergone many changes and for those times when geologic data are widespread and abundant the Mesozoic appears to have been one of the warmest intervals. This was a time during which the single continent Pangea disintegrated into continental units similar to those of today, a time when there were no significant polar ice caps and sea level was generally much higher than at the present time, and a time when dinosaurs apparently dominated terrestrial faunas and the flowering plants evolved. Understanding this alien world, ancestral to ours, is intrinsically interesting, intellectually challenging, and offers opportunities for more effective targeting of sites where commercially important geological resources may be found. It also provides critical insights into the operation of coupled Earth systems (biospheric, atmospheric, hydrospheric and geospheric) under extreme 'greenhouse' conditions, and therefore may have relevance to possible future global change. Our intention in organizing this Discussion Meeting was to bring together those who gather and interpret geologic data with those who model global climates from first principles. The community of workers who study the Quaternary have made significant advances by integrating and comparing palaeodata and climate model experiments. Although we have focused not on the Quaternary 'icehouse' but on the Mesozoic 'hothouse' climate we are well aware that approaches used in the study of the Quaternary may have relevance to earlier times.

The Handbook of Geoscience
The Handbook of Geoscience

Author: Frank R. Spellman

Publisher: Rowman & Littlefield

Published: 2013

Total Pages: 565

ISBN-13: 0810886146

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Written in an engaging and highly readable style, The Handbook of Geoscience is ideal for students, administrators, legal professionals, non-scientific professionals, and general readers with little or no science background. This handbook is a user-friendly overview of our physical, biological, and ecological environment, one that offers up-to-date coverage of the major scientific fields that form the structure of geoscience. Students who are enrolled in a geoscience course or one of its many subdisciplines will find this work an invaluable resource to support and supplement classroom instruction. The emphasis is on readability, with clear, example-driven explanations refined by more than 35 years of experience of instruction and student feedback.

Environmental Considerations Associated with Hydraulic Fracturing Operations
Environmental Considerations Associated with Hydraulic Fracturing Operations

Author: James A. Jacobs

Publisher: John Wiley & Sons

Published: 2019-04-05

Total Pages: 580

ISBN-13: 1119336104

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A guide to environmental and communication issues related to fracking and the best approach to protect communities Environmental Considerations Associated with Hydraulic Fracturing Operations offers a much-needed resource that explores the complex challenges of fracking by providing an understanding of the environmental and communication issues that are inherent with hydraulic fracturing. The book balances the current scientific knowledge with the uncertainty and risks associated with hydraulic fracking. In addition, the authors offer targeted approaches for helping to keep communities safe. The authors include an overview of the historical development of hydraulic fracturing and the technology currently employed. The book also explores the risk, prevention, and mitigation factors that are associated with fracturing. The authors also include legal cases, regulatory issues, and data on the cost of recovery. The volume presents audit checklists for gathering critical information and documentation to support the reliability of the current environmental conditions related to fracking operations and the impact fracking can have on a community. This vital resource: Contains the technical information and mitigation recommendations for safety and environmental issues related to hydraulic fracturing Offers an historical overview of conventional and unconventional oil and gas drilling Explains the geologic and technical issues associated with fracking of tight sand and shale formulations Presents numerous case studies from the United States EPA and other agencies Discusses issues of co-produced waste water and induced seismicity from the injection of wastewater Written for environmental scientists, geologists, engineers, regulators, city planners, attorneys, foresters, wildlife biologists, and others, Environmental Considerations Associated with Hydraulic Fracturing Operations offers a comprehensive resource to the complex environmental and communication issues related to fracking.