Journal ArticleDOI
A chronology of Paleozoic sea-level changes.
Bilal U. Haq,Stephen R. Schutter +1 more
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TLDR
A history of sea-level fluctuations for the entire Paleozoic by using stratigraphic sections from pericratonic and cratonic basins is reconstructed, revealing a gradual rise through the Cambrian and a short-lived but prominent withdrawal in response to Hirnantian glaciation.Abstract:
Sea levels have been determined for most of the Paleozoic Era (542 to 251 million years ago), but an integrated history of sea levels has remained unrealized. We reconstructed a history of sea-level fluctuations for the entire Paleozoic by using stratigraphic sections from pericratonic and cratonic basins. Evaluation of the timing and amplitude of individual sea-level events reveals that the magnitude of change is the most problematic to estimate accurately. The long-term sea level shows a gradual rise through the Cambrian, reaching a zenith in the Late Ordovician, then a short-lived but prominent withdrawal in response to Hirnantian glaciation. Subsequent but decreasingly substantial eustatic highs occurred in the mid-Silurian, near the Middle/Late Devonian boundary, and in the latest Carboniferous. Eustatic lows are recorded in the early Devonian, near the Mississippian/Pennsylvanian boundary, and in the Late Permian. One hundred and seventy-two eustatic events are documented for the Paleozoic, varying in magnitude from a few tens of meters to ∼125 meters.read more
Citations
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The Capitanian (Permian) minimum of 87Sr/86Sr ratio in the mid-Panthalassan paleo-atoll carbonates and its demise by the deglaciation and continental doming
TL;DR: The Capitanian minimum in the Permian represents one of the most significant features in the Phanerozoic seawater 87 Sr/86 Sr history as discussed by the authors. But the results of this study are limited.
Journal ArticleDOI
A model for the decrease in amplitude of carbon isotope excursions across the Phanerozoic
TL;DR: In this paper, the authors demonstrate that sinusoidal modulation of the sensitivity of organic carbon and phosphate burial in a simple numerical model of the geologic carbon cycle results in large, asymmetric δ13C oscillations that exhibit their largest amplitudes in the 0.5 to 10 M.yr. period range.
Journal ArticleDOI
A regional tectonic event of Katian (Late Ordovician) age across three major blocks of China
TL;DR: In this article, a tectonic event of Late Ordovician age affecting three blocks of China, i.e. South China, North China and Tarim, is discussed.
Journal ArticleDOI
Mineralogy and geochemistry of claystones from the Guadalupian-Lopingian boundary at Penglaitan, South China: Insights into the pre-Lopingian geological events
TL;DR: In this article, a combined study of mineralogy, geochemistry and geochronology has been carried out on six layers of claystones collected below (Group 1) and above (Group 2) the Guadalupian-Lopingian boundary at the Penglaitan section.
Journal ArticleDOI
Revisiting the Great Ordovician Diversification of land plants: Recent data and perspectives
Thomas Servais,Borja Cascales-Miñana,Christopher J. Cleal,Philippe Gerrienne,David A. T. Harper,Mareike Neumann,Mareike Neumann +6 more
TL;DR: In this paper, molecular clock data suggest with high probability a Cambrian origin of Embryophyta (also called land plants), indicating that their terrestrialization most probably started about 500 Ma.
References
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Journal ArticleDOI
The Phanerozoic Record of Global Sea-Level Change
Kenneth G. Miller,Michelle A. Kominz,James V. Browning,James D. Wright,Gregory S. Mountain,Miriam E. Katz,Peter J. Sugarman,Benjamin S. Cramer,Nicholas Christie-Blick,Stephen F. Pekar +9 more
TL;DR: Long-term sea level peaked at 100 ± 50 meters during the Cretaceous, implying that ocean-crust production rates were much lower than previously inferred, and presents a new sea-level record for the past 100 million years.
Journal ArticleDOI
Synchronizing Rock Clocks of Earth History
Klaudia F. Kuiper,Klaudia F. Kuiper,Alan L. Deino,Frederik J Hilgen,Wout Krijgsman,Paul R. Renne,Paul R. Renne,Jan R. Wijbrans +7 more
TL;DR: This calibration of tephras in marine deposits in Morocco to calibrate the age of Fish Canyon sanidine provides tight constraints for the astronomical tuning of pre-Neogene successions, resulting in a mutually consistent age of ∼65.95 Ma for the Cretaceous/Tertiary boundary.
Journal ArticleDOI
Sequences in the Cratonic Interior of North America
TL;DR: The concept of major rock-stratigraphic units of interregional scope was introduced in 1948 by Longwell, 1949 as discussed by the authors, and the sedimentary record of the North American craton from late Precambrian to present is characterized by six major unconformities.
Book
The Concise Geologic Time Scale
TL;DR: For a detailed discussion of the international divisions of geologic time, see as discussed by the authors, where the authors present the standard colors for the international division of geology time scales in detail.
Journal ArticleDOI
Long-Term Sea-Level Fluctuations Driven by Ocean Basin Dynamics
TL;DR: A mantle convection model is used to suggest that New Jersey subsided by 105 to 180 meters in the past 70 million years because of North America's westward passage over the subducted Farallon plate, which reconciles New Jersey margin–based sea-level estimates with ocean basin reconstructions.