Mammalian Fauna of the Judith River Formation (Late Cretaceous, Judithian), Northcentral Montana PDF Download
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Author: Marisol Montellano
Publisher: Univ of California Press
ISBN: 0520097688
Category : Nature
Languages : en
Pages : 125
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Book Description
Approximately 12 million years before the extinction of the dinosaurs, a diverse terrestrial fauna inhabited what is now northcentral Montana. The author describes and evaluates the systematic relationships of the large mammalian fauna of this area, which included rodent-like multituberculates, primitive therians, marsupials, and early eutherian mammals, and also analyzes the biogeography of mammalian faunas of the Judithian age.
Author: Marisol Montellano
Publisher: Univ of California Press
ISBN: 0520097688
Category : Nature
Languages : en
Pages : 125
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Book Description
Approximately 12 million years before the extinction of the dinosaurs, a diverse terrestrial fauna inhabited what is now northcentral Montana. The author describes and evaluates the systematic relationships of the large mammalian fauna of this area, which included rodent-like multituberculates, primitive therians, marsupials, and early eutherian mammals, and also analyzes the biogeography of mammalian faunas of the Judithian age.
Author: Ashok Sahni
Publisher:
ISBN:
Category : Judith River Formation
Languages : en
Pages : 90
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Book Description
"Geologic investigation of the late Cretaceous Judith River Formation in the area just north of the Judith River on the Missouri River in north-central Montana has resulted in the discovery of varied vertebrate forms. The beds are mainly freshwater continental deposits consisting of crossbedded channel sandstones, gray siltstones, and carbonaceous shales with occasional seams of lignitic coal. The stratigraphic sequence consists of the Marias River Shale overlain by the Eagle, Claggett, Judith River, and Bearpaw formations. The last four constitute Montana Group. The Judith River Formation is Campanian in age as determined by its position between the fossiliferous marine Claggett and Bearpaw shales. The fauna was obtained from the upper 50 feet of the formation. The bone concentration in the productive sandstone is the result of size sorting leading to underrepresentation of the larger dinosaurs. Three orders of mammals are represented, the Eutheria by a single genus, the Allotheria by five, and the Metatheria by at least three genera. Teiid and parasaniwid lizards are frequent. Only a fraction of the large number of described dinosaur genera, however, is represented in the collection by isolated teeth. Fish and amphibians form a sizable portion of the fauna. Vertebrates from the Judith River Formation are more primitive than, but generally similar to, later Maestrichtian species. The mammals differ from their descendants in the Lance Formation at the species level. The community structure and the paleoecology of the fauna of the Judith River Formation resemble those of the Lance Formation. The greatest difference between the two communities is the greater variety of dinosaurs in the earlier formation"--P. 325.
Author: Mark Benjamin Goodwin
Publisher:
ISBN:
Category :
Languages : en
Pages : 306
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Book Description
Author: Spencer G. Lucas
Publisher: New Mexico Museum of Natural History and Science
ISBN:
Category : Science
Languages : en
Pages : 427
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Book Description
Author: Michael O. Woodburne
Publisher: Columbia University Press
ISBN: 0231130406
Category : Computers
Languages : en
Pages : 413
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Book Description
This book places into modern context the information by which North American mammalian paleontologists recognize, divide, calibrate, and discuss intervals of mammalian evolution known as North American Land Mammal Ages. It incorporates new information on the systematic biology of the fossil record and utilizes the many recent advances in geochronologic methods and their results. The book describes the increasingly highly resolved stratigraphy into which all available temporally significant data and applications are integrated. Extensive temporal coverage includes the Lancian part of the Late Cretaceous, and geographical coverage includes information from Mexico, an integral part of the North American fauna, past and present.
Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 702
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Book Description
Author: Joseph Herbert Hartman
Publisher: Geological Society of America
ISBN: 9780813723617
Category : Science
Languages : en
Pages : 530
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Book Description
Author: David D. Gillette
Publisher: Utah Geological Survey
ISBN: 1557916349
Category : Nature
Languages : en
Pages : 568
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Book Description
The 52 papers in this vary in content from summaries or state-of-knowledge treatments, to detailed contributions that describe new species. Although the distinction is subtle, the title (Vertebrate Paleontology in Utah) indicates the science of paleontology in the state of Utah, rather than the even more ambitious intent if it were given the title “Vertebrate Paleontology of Utah” which would promise an encyclopedic treatment of the subject. The science of vertebrate paleontology in Utah is robust and intense. It has grown prodigiously in the past decade, and promises to continue to grow indefinitely. This research benefits everyone in the state, through Utah’s muse ums and educational institutions, which are the direct beneficiaries.
Author: Philip J. Currie
Publisher: Indiana University Press
ISBN: 9780253345950
Category : Nature
Languages : en
Pages : 712
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Book Description
"This comprehensive history of a remarkable window into the history of the earth will be required reading for everyone interested in the life of the past."--BOOK JACKET.
Author: Frank Zachos
Publisher: Walter de Gruyter GmbH & Co KG
ISBN: 3110341557
Category : Science
Languages : en
Pages : 394
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Book Description
There are nearly 6,000 mammalian species, among them our own. Research on our evolutionary cousins has a long history, but the last 20 years have seen particularly rapid progress in disentangling the interrelationships and evolutionary history of mammals. The present volume combines up-to-date reviews on mammalian phylogenetics with paleontological, taxonomic and evolutionary chapters and also summarizes the historical development of our insights in mammalian relationships, and thus our own place in the Tree of Life. Our book places the present biodiversity crisis in context, with one in four mammal species threatened by extinction, and reviews the distribution and conservation of mammalian diversity across the globe. This volume is the introductory tome to the new Mammalia series of the Handbook of Zoology and will be essential reading for mammalogists, zoologists and conservationists alike.
