Download or read book The Oligocene Bridge Creek Flora of the John Day Formation Oregon written by Herbert William Meyer and published by . This book was released on 1997 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book The Ancient Forests of Oregon written by Ralph Works Chaney and published by . This book was released on 1963 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fossil Flora of the John Day Basin Oregon written by Frank Hall Knowlton and published by . This book was released on 1902 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Handbook of Oregon Plant and Animal Fossils written by William N. Orr and published by . This book was released on 1981 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Oligocene Haynes Creek Flora of Eastern Idaho written by Daniel I. Axelrod and published by Univ of California Press. This book was released on 1998-07-31 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: This flora of 70 species is dominated by deciduous trees, many with descendants in China. Precipitation was 890 mm, mean annual temperature 12.5°C, the annual range 10°C, and freezing rare. Elevation was about 1000 meters. Comparison with the Horse Prairie flora, 30 miles east and across the present continental divide, indicates that the divide was then low and discontinuous, with warmer climate to the east.
Download or read book Central Oregon written by and published by . This book was released on 1932 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Geobiology and Ecology of Metasequoia written by Ben A. LePage and published by Springer Science & Business Media. This book was released on 2005-07-22 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt: The plant fossil record indicates that the genus Metasequoia was widely distributed throughout the Northern Hemisphere from the early Late Cretaceous to the Plio-Pleistocene. Today the genus has shrunk to one species with approximately 5,000 mature individuals in southeastern China’s Xiahoe Valley. This book distills the current understanding of the biology, ecology and physiology of fossil and living Metasequoia, current research directions and problems that remain unresolved.
Download or read book Eocene and Oligocene Paleosols of Central Oregon written by Greg John Retallack and published by Geological Society of America. This book was released on 1999-01-01 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Miocene Seldovia Point Flora from the Kenai Group Alaska written by Jack A. Wolfe and published by . This book was released on 1980 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geology of the Latah Formation in Relation to the Lavas of the Columbia Plateau Near Spokane Washington written by Joseph Thomas Pardee and published by . This book was released on 1926 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Phylogeny and Evolution of the Angiosperms written by Douglas Soltis and published by University of Chicago Press. This book was released on 2018-01-24 with total page 587 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although they are relative latecomers on the evolutionary scene, having emerged only 135?170 million years ago, angiosperms—or flowering plants—are the most diverse and species-rich group of seed-producing land plants, comprising more than 15,000 genera and over 350,000 species. Not only are they a model group for studying the patterns and processes of evolutionary diversification, they also play major roles in our economy, diet, and courtship rituals, producing our fruits, legumes, and grains, not to mention the flowers in our Valentine’s bouquets. They are also crucial ecologically, dominating most terrestrial and some aquatic landscapes. This fully revised edition of Phylogeny and Evolution of the Angiosperms provides an up-to-date, comprehensive overview of the evolution of and relationships among these vital plants. Incorporating molecular phylogenetics with morphological, chemical, developmental, and paleobotanical data, as well as presenting a more detailed account of early angiosperm fossils and important fossil information for each evolutionary branch of the angiosperms, the new edition integrates fossil evidence into a robust phylogenetic framework. Featuring a wealth of new color images, this highly synthetic work further reevaluates long-held evolutionary hypotheses related to flowering plants and will be an essential reference for botanists, plant systematists, and evolutionary biologists alike.
Download or read book Guidebook of the Western United States written by Gerald Francis Loughlin and published by . This book was released on 1933 with total page 1332 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Oaks Physiological Ecology Exploring the Functional Diversity of Genus Quercus L written by Eustaquio Gil-Pelegrín and published by Springer. This book was released on 2017-12-12 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt: With more than 500 species distributed all around the Northern Hemisphere, the genus Quercus L. is a dominant element of a wide variety of habitats including temperate, tropical, subtropical and mediterranean forests and woodlands. As the fossil record reflects, oaks were usual from the Oligocene onwards, showing the high ability of the genus to colonize new and different habitats. Such diversity and ecological amplitude makes genus Quercus an excellent framework for comparative ecophysiological studies, allowing the analysis of many mechanisms that are found in different oaks at different level (leaf or stem). The combination of several morphological and physiological attributes defines the existence of different functional types within the genus, which are characteristic of specific phytoclimates. From a landscape perspective, oak forests and woodlands are threatened by many factors that can compromise their future: a limited regeneration, massive decline processes, mostly triggered by adverse climatic events or the competence with other broad-leaved trees and conifer species. The knowledge of all these facts can allow for a better management of the oak forests in the future.
Download or read book U S Geological Survey Professional Paper written by and published by . This book was released on 1984 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Professional Paper written by and published by . This book was released on 1926 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:
