The Paleontology and Stratigraphy of the Marine Pliocene and Pleistocene, of San Pedro, California (Classic Reprint)


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Excerpt from The Paleontology and Stratigraphy of the Marine Pliocene and Pleistocene, of San Pedro, California The field work upon which this paper is based began in the winter of 1886, when the writer first visited the fossil-bearing beds of San Pedro. Since that time several visits have been made each year to the beds in that vicinity, generally after heavy rains, when landslides and the breaking off of the banks have given new exposures. The specimens Obtained during these excursions are in the collection of the writer's father, Delos Arnold of Pasadena, California, and have furnished most of the material on which the present paper is based. It was first intended to compile a list, with synonymy, of the fossils of San Pedro and vicinity, but the scope of the paper has been enlarged until the present work is the result. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.













Journal of Research


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Introduction to the Geology of Southern California and Its Native Plants


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With its active fault systems, complex landforms, and myriad natural habitats, southern California boasts a rich and dynamic geologic environment. This abundantly illustrated volume at last provides an up-to-date, authoritative, and accessible resource for students and general readers interested in southern California's geology and native plants. Covering an extensive area, north from San Diego to Yosemite in the Sierra Nevada and east to the Mojave and Colorado deserts, its unique, comprehensive approach brings together for the first time the basic principles of geology, the story of plate tectonics, in-depth discussion of the geology of many specific locales within the region, and information on identifying southern California's native plants.







Nearshore Marine Paleoclimatic Regions, Increasing Zoogeographic Provinciality, Molluscan Extinctions, and Paleoshorelines, California


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Approximately 3000 middle and late Cenozoic nearshore marine molluscan taxa from western California are assigned to six time periods, spanning ~25 m.y. In this interdisciplinary study, western California is palinspastically restored for each of the time periods by backsliding and back-rotating large fault blocks or crustal units. Marine fossil assemblages are assigned to nearshore paleoclimatic regions or water masses within palinspastically restored California. In addition, this volume reveals positive feedback mechanisms between paleolatitudinal changes in sea-surface paleotemperature gradients and changes in the diversity of marine mollusks along the California coast through time; defines "equable" based effective temperatures; and analyzes extinction rates among macroinvertebrate marine taxa from coastal California and the possible causes of these extinctions. The late Paleogene to Neogene faunas reflect an increase in faunal diversity related to strengthened temperature gradients, greater extremes in sea-surface temperatures, reduction in temperateness, and the development of an embayed California coastline.




Geology of the Los Angeles Basin, California


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The evolution of a most prolific oil district and the framework for several detailed reports on its geology and gravitational aspects.