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Cambrian–Ordovician of the central Appalachians: Correlations and event stratigraphy of carbonate platform and adjacent deep-water deposits

By
David K. Brezinski
David K. Brezinski
Maryland Geological Survey, 2300 St. Paul Street, Baltimore, Maryland 21218, USA
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John F. Taylor
John F. Taylor
Geoscience Department, Indiana University of Pennsylvania, Indiana, Pennsylvania 15705, USA
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John E. Repetski
John E. Repetski
U.S. Geological Survey, National Center, Reston, Virginia 21092, USA
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James D. Loch
James D. Loch
School of Environmental, Physical, and Applied Sciences, University of Central Missouri, Warrensburg, Missouri 64093, USA
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Published:
January 01, 2015

Abstract

This trip seeks to illustrate the succession of Cambrian and Ordovician facies deposited within the Pennsylvania and Maryland portion of the Great American Carbonate Bank. From the Early Cambrian (Dyeran) through Late Ordovician (Turinan), the Laurentian paleocontinent was rimmed by an extensive carbonate platform. During this protracted period of time, a succession of carbonate rock, more than two miles thick, was deposited in Maryland and Pennsylvania. These strata are now exposed in the Nittany arch of central Pennsylvania; the Great Valley of Pennsylvania, Maryland, and Virginia; and the Conestoga and Frederick Valleys of eastern Pennsylvania and Maryland. This field trip will visit key outcrops that illustrate the varied depositional styles and environmental settings that prevailed at different times within the Pennsylvania reentrant portion of the Great American Carbonate Bank. In particular, we will contrast the timing and pattern of sedimentation in off-shelf (Frederick Valley), outer-shelf (Great Valley), and inner-shelf (Nittany arch) deposits. The deposition was controlled primarily by eustasy through the Cambrian and Early Ordovician (within the Sauk megasequence), but was strongly influenced later by the onset of Taconic orogenesis during deposition of the Tippecanoe megasequence.

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GSA Field Guide

Tripping from the Fall Line: Field Excursions for the GSA Annual Meeting, Baltimore, 2015

David K. Brezinski
David K. Brezinski
Maryland Geological Survey 2300 St. Paul Street Baltimore, Maryland 21218, USA
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Jeffrey P. Halka
Jeffrey P. Halka
Maryland Geological Survey 2300 St. Paul Street Baltimore, Maryland 21218, USA
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Richard A. Ortt, Jr.
Richard A. Ortt, Jr.
Maryland Geological Survey 2300 St. Paul Street Baltimore, Maryland 21218, USA
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Geological Society of America
Volume
40
ISBN electronic:
9780813756400
Publication date:
January 01, 2015

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