Published by the American Geophysical Union as part of the Geophysical Monograph Series, Volume 146.
Earth climate is uniquely determined at any time by the varied interactions of its components: lithosphere, biosphere, atmosphere, hydrosphere (ocean, lakes and rivers) and cryosphere. Over the past 544 million years (the Phanerozoic Eon), these components of the climate system have undergone significant changes but perhaps none more extreme than in the Proterozoic Era (2.5 G-544 Ma) With at least three periods with low-latitude glacial deposits (during the Palaeoproterozoic and Neoproterozoic), the cryosphere may have dominated the earth's surface, possibly the only such event in earth's history. Indeed, if the Earth had an obliquity similar to the present (23.45), then low-latitude glaciation could represent a nearly ice- and snow-covered globe. Effects would have been multiform: The influence of the hydrosphere would have been at a minimum and most living organisms would have been confined to small areas of open ocean if they existed at all, or possibly near hydrothermal vents. The atmosphere would have been very dry and nearly cloud-free.
Gregory S. Jenkins
, Mark A. S. McMenami
, Christopher P. McKay
, Linda Sohl
American Geophysical Union
Country of Publication:
Series: Geophysical Monograph Series
01 January 2004
Professional and scholarly
The Extreme Proterozoic: Geology, Geochemistry, and Climate Preface Gregory S. Jenkins, Mark A. S. McMenamin, Christopher McKay, and Linda Sohl vii Introduction: The Proterozoic Gregory S. Jenkins, Christopher McKay, and Mark A. S. McMenamin 1 Observations of Extreme Proterozoic Conditions Paleomagnetic Constraints on Neoproterozoic 'Snowball Earth' Continental Reconstructions Joseph G. Meert and Trond. H. Torsvik 5 Geochemical Climate Proxies Applied to the Neoproterozoic Glacial Succession on the Yangtze Platform, South China Nicole Dobrzinski, Heinrich Bah I burg, Harald Strauss, and Qirui Zhang 13 Formerly-Aragonite Seafloor Fans from Neoproterozoic Strata, Death Valley and Southeastern Idaho, United States: Implications for Cap Carbonate Formation and Snowball Earth Frank A. Corsetti, Nathaniel J. Lorentz, and Sara B. Pruss 33 Modeling Extreme Proterozoic Conditions Analysis of Carbon Cycle System During the Neoproterozoic: Implications for Snowball Earth Events Eiichi Tajika 45 Secular Changes in the Importance of Neritic Carbonate Deposition as a Control on the Magnitude and Stability of Neoproterozoic Ice Ages Andy Ridgwell and Martin Kennedy 55 A Review of Neoproterozoic Climate Modeling Studies Gregory S. Jenkins 73 Global Tectonic Setting and Climate of the Late Neoproterozoic: A Climate-Geochemical Coupled Study Yannick Donnadieu, Gilles Ramstein, Yves Godderis, and Frederic Fluteau 79 Climate-Ice Sheet Simulations of Neoproterozoic Glaciation Before and After Collapse to Snowball Earth David Pollard and James F. Kasting 91 Climate Dynamics in Deep Time: Modeling the Snowball Bifurcation and Assessing the Plausibility of its Occurrence W. R. Peltier, L. Tarasov, G. Vettoretti, and L. R Solheim 107 Synthesis: Hypothesis and Processes That Explain Extreme Proterozoic Climate Interpreting the Neoproterozoic Glacial Record: The Importance of Tectonics Nicholas Eyles and Nicole Januszczak 125 Neoproterozoic Glaciation: Reconciling Low Paleolatitudes and the Geologic Record George E. Williams and Phillip W. Schmidt 145 Earth's Earliest Extensive Glaciations: Tectonic Setting and Stratigraphic Context of Paleoproterozoic Glaciogenic Deposits Grant M. Young 161 High Obliquity as an Alternative Hypothesis to Early and Late Proterozoic Extreme Climate Conditions Gregory S. Jenkins 183 Thin Ice on the Snowball Earth Christopher P. Mckay 193 Biological Aspects of Neoproterozoic Glaciation and its Implications for the Cambrian Explosion Neoproterozoic Glaciations and the Fossil Record Shuhia Xiao 199 Climate, Paleoecology and Abrupt Change During the Late Proterozoic: A Consideration of Causes and Effects Mark A. S. McMenamin 215
Gregory S. Jenkins is the editor of The Extreme Proterozoic: Geology, Geochemistry, and Climate, published by Wiley. Mark A. S. McMenamin is an American paleontologist and professor of geology at Mount Holyoke College. He has contributed to the study of the Cambrian explosion and the Ediacaran biota.