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"The Markagunt and Sevier gravity slides are gigantic landslides that resulted from gravitationally induced catastrophic failure of the southern flank of the Oligocene to Miocene Marysvale volcanic field. Each is nearly 100 km long with runouts over the former land surface >35 km; together they span 7000 km2 and rank among Earth's largest terrestrial landslides. Basal cataclastic layers, injectites, pseudotachylyte, deformed clasts, and a variety of kinematic indicators demonstrate catastrophic emplacement, which was preceded by slow gravitational spreading of the volcanic field. This volume offers a history of their discovery, our current understanding of the gravity slides, and a guide to particularly instructive exposures for which the authors document their conclusions about the size, age, and significant structural features of these newly discovered features"-- Provided by publisher

The last comprehensive review of the fossil vertebrates from the Miocene of Calvert Cliffs was published more than 100 years ago. This volume is a collection of papers that updates some of the geological features of Calvert Cliffs and provides reviews of the fossil biota that includes representatives from the following taxonomic groups: chondrichthyans (chimaeras, shark, skates, and rays), actinopterygians (ray-finned fishes), crocodilians (crocodiles), pinnipeds (seals), and sirenians (sea cows). Peter Vogt, Ralph R. Eshelman, and Stephen J. Godfrey document how the 20-40 m (65-130 feet) high Calvert Cliffs along the Western Shore of Chesapeake Bay continue to yield insights into 18-8 Ma (middle Miocene) geology, marine and terrestrial vertebrate fauna, and origin and evolution of Chesapeake Bay and Calvert Cliffs up to the present. These exposures rank high among the best-known fossiliferous deposits of any age. Bretton W. Kent describes the cartilaginous fish (the chondrichthyan) fauna consisting of 53 species; three chimaeras (ratfishes), 38 sharks, and 12 skates and rays; a fauna rich in large macrophagous sharks and large neritic rays. Giorgio Carnevale and Stephen J. Godfrey present an account of the 38 actinopterygian taxa known from osteological remains and a diverse otolith assemblage of at least 55 taxa. These actinopterygians show an affinity for well-oxygenated muddy and sandy substrates dominated by shallow water species characteristic of the inner shelf, and secondarily by epipelagic taxa. Robert E. Weems details the crocodilians referable to the tomistomine Thecachampsa. The closest living relative is Tomistoma schlegelii, the false-gharial of Southeast Asia. Two species are present: Thecachampsa sericodon and T. antiquus--Provided by publisher.

• The geology and paleontology of Ashfall Fossil Beds, a late Miocene (Clarendonian) mass- death assemblage, Antelope County and adjacent Knox County, Nebraska, USA / S.T. Tucker, R.E. Otto, R.M. Joeckel, and M.R. Voorhies
• Pleistocene geology and classic type sections along the Missouri River Valley in Western Iowa / Charles W. Rovey II and E.A. Bettis III
• Building and decorative stones, and other geological aspects of the Nebraska Capitol / Joseph T. Hannibal.

"Sites of geologic interest along the boundary between the Central Lowlands and the Great Plains are anything but subtle. Both geological and human forces have created some treasures in this area, and this guidebook includes three field trips offered at the GSA North-Central Section meeting in Lincoln, Nebraska, in April 2014"-- Provided by publisher.

• List of contributors-- Preface--
• 1. Background for a paleoecological study of the Santa Cruz Formation (late Early Miocene) on the Atlantic Coast of Patagonia Sergio F. Vizcaino, Richard F. Kay and M. Susana Bargo--
• 2. Tephrochronology of the Santa Cruz and Pinturas Formation Michael E. Perkins, John G. Fleagle, Matthew T. Heitzler, Barbara Nash, Thomas M. Bown, Adan A. Tauber and Maria T. Dozo--
• 3. Tephrochronology and paleontology of the Santa Cruz and Pinturas Formation John G. Fleagle, Michael E. Perkins, Matthew T. Heitzler, Barbara Nash, Thomas M. Bown, Adan A. Tauber, Maria T. Dozo and Marcelo F. Tejedor--
• 4. Sedimentology and paleoenvironment of the Santa Cruz Formation Sergio Matheos and M. Sol Raigemborm--
• 5. Oysters from the base of Santa Cruz Formation (late Early Miocene) of Patagonia Miguel Griffin and Ana Parras--
• 6. Ichnology of the Santa Cruz Formation (late Early Miocene), at the coast between the Rio Gallegos and Rio Coyle Veronica Krapovickas--
• 7. Fossil plant studies from late Early Miocene of the Santa Cruz Formation: paleoecology and paleoclimatology at the passive margin of Patagonia, Argentina Mariana Brea, Alejandro Zucol and Ari Iglesias--
• 8. Amphibians and squamate reptiles from the Santa Cruz Formation (late Early Miocene), Santa Cruz Province, Argentina: paleoenvironmental and paleobiological considerations Juan Carlos Fernicola and Adriana Albino--
• 9. Diversity and paleobiology of the Santacrucian birds Federico Degrange, Jorge I. Noriega and Juan I. Areta--
• 10. Paleoecology of the Paucituberculata and Microbiotheria (Mammalia, Marsupialia) from the late Early Miocene of Patagonia M. Alejandra Abello, Edgardo Ortiz-Jaureguizar and Adriana M. Candela--
• 11. Paleoecology of the mammalian carnivores (Metatheria, Sparassodonta) of the Santa Cruz Formation (late Early Miocene) Francisco Prevosti, Analia M. Forasiepi, Marcos Ercoli and Guillermo F. Turazzini--
• 12. Paleobiology of Santacrucian glyptodonts and armadillos (Xenarthra, Cingulata) Sergio F. Vizcaino, Juan Carlos Fernicola and M. Susana Bargo--
• 13. Paleobiology of the Santacrucian sloths and anteaters (Xenarthra, Pilosa) M. Susana Bargo, Nestor Toledo and Sergio F. Vizcaino--
• 14. Paleobiology of Santacrucian native ungulates (Meridiungulata: Astrapotheria, Litopterna and Notoungulata) Guillermo H. Cassini, Esperanza Cerdeno, Amalia Villafane and Nahuel A. Munoz--
• 15. Paleobiology of Santacrucian Caviomorph rodents: a morpho-functional approach Adriana M. Candela, Luciano L. Rasia and Maria E. Perez--
• 16. The paleobiology of Santacrucian primates Richard F. Kay, Jonathan M. G. Perry, Michael Malinzak, Kari Allen, E. Christopher Kirk, J. Michael Plavcan and John G. Fleagle--
• 17. A review of the paleoenvironment and paleoecology of the Miocene Santa Cruz Formation Richard F. Kay, Sergio F. Vizcaino and M. Susana Bargo-- Index.
• (source: Nielsen Book Data)

Coastal exposures of the Santa Cruz Formation in southern Patagonia have been a fertile ground for recovery of Early Miocene vertebrates for more than 100 years. This volume presents a comprehensive compilation of important mammalian groups which continue to thrive today. It includes the most recent fossil finds as well as important new interpretations based on ten years of fieldwork by the authors. A key focus is placed on the paleoclimate and paleoenvironment during the time of deposition in the Middle Miocene Climatic Optimum (MMCO) between twenty and fifteen million years ago. The authors present the first reconstruction of what climatic conditions were like and present important new evidence of the geochronological age, habits and community structures of fossil bird and mammal species. Academic researchers and graduate students in paleontology, paleobiology, paleoecology, stratigraphy, climatology and geochronology will find this a valuable source of information about this fascinating geological formation.
(source: Nielsen Book Data)