The Chesapeake Bay Crater Geology and Geophysics of a Late Eocene Submarine Impact Structure

The Chesapeake Bay Crater Geology and Geophysics of a Late Eocene Submarine Impact Structure / by Wylie Poag, Christian Koeberl, Wolf Uwe Reimold.

This volume synthesizes 16 years of geological and geophysical studies that document an 85-km-wide impact crater buried 500 m beneath Chesapeake Bay in southeastern Virginia, USA. The authors integrate extensive seismic reflection profiling and deep core drilling to analyze the structure, morphology...

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Bibliographic Details
Main Authors: Poag, Wylie (Author), Koeberl, Christian (Author), Reimold, Wolf Uwe (Author)
Corporate Author: SpringerLink (Online service)
Format: eBook
Language:English
Published: Berlin, Heidelberg : Springer Berlin Heidelberg : Imprint: Springer, 2004.
Edition:1st ed. 2004.
Series:Impact Studies,
Springer eBook Collection.
Subjects:
Geomorphology.
Geology.
Atmospheric sciences.
Geophysics.
Electronic resources (E-books)
Online Access:Click to view e-book
Holy Cross Note:Loaded electronically.
Electronic access restricted to members of the Holy Cross Community.
Table of Contents:
  • 1 Introduction
  • 2 Geological Framework of Impact Site
  • 2.1 Crystalline Basement Rocks
  • 2.2 Coastal Plain Sedimentary Rocks
  • 2.3 Sequence Stratigraphy
  • 2.4 Paleogeography of Impact Site
  • 2.5 Subsidence of Virginia Continental Margin
  • 2.6 Initial Evidence of East Coast Impact
  • 2.7 Onshore Borehole Evidence
  • 3 Geophysical Framework of Impact Site
  • 3.1 Seismic Investigations of Virginia Coastal Plain
  • 3.2 Seismic Signature of Crystalline Basement Rocks
  • 3.3 Chesapeake Bay Seismic Reflection Profiles
  • 3.4 Depth Conversion of Seismic Two-way Traveltimes
  • 3.5 Gravity Evidence
  • 4 The Primary Crater
  • 4.1 Crater Structure and Morphology
  • 5 Secondary Craters
  • 5.1 Location and Identification
  • 5.2 Secondary Craters on Profile T-1-CB
  • 5.3 Secondary Craters on Profile T-11-PR
  • 5.4 Implications of Secondary Crater Record
  • 6 Synimpact Crater-Fill Deposits
  • 6.1 Oldest Breccia Unit
  • 6.2 Displaced Megablocks
  • 6.3 The Exmore Breccia
  • 7 Initial Postimpact Deposits
  • 7.1 Depositional Setting
  • 7.2 Dead Zone
  • 7.3 Chickahominy Formation
  • 8 Age of Chesapeake Bay Impact Crater
  • 8.1 Biochronology
  • 8.2 Radiometric Chronology
  • 8.3 Magnetochronology
  • 8.4 Correlation with Other Craters and Impactites
  • 9 Geological Consequences of Chesapeake Bay Impact
  • 9.1 General Nature of Consequences
  • 9.2 Reconfigured Basement Structure and Morphology
  • 9.3 Disruption of Preimpact Sedimentary Column
  • 9.4 Source of North AmericanTektite Strewn Field
  • 9.5 Far-Field Seismic Effects
  • 10 Comparisons with Other Impact Craters
  • 10.1 Terrestrial Craters
  • 10.2 Extraterrestrial Craters
  • 10.3 Comparison with Chicxulub Multiring Impact Basin
  • 11 Comparisons Between Impactites
  • 11.1 Terrestrial Impactites
  • 11.2 Flowin, Fallout, and Dead Zone
  • 11.3 Other Intrabreccia Bodies
  • 11.4 Continuous Ejecta Blankets
  • 11.5 Secondary Breccias
  • 11.6 Strewn Fields
  • 11.7 Impact Melt Rocks
  • 12 Implications for Impact Models
  • 12.1 General Conceptual Models and Scaling Relations
  • 12.2 Conceptual Model for Chesapeake Bay Crater
  • 12.4 General Conceptual Model of Crater-Fill Deposition
  • 12.4 Differentiating Crater-Fill Lithofacies at Chesapeake Bay
  • 12.5 Comparison of Models
  • 13 Biospheric Effects of Chesapeake Bay Impact
  • 13.1 Local Paleoenvironmental Effects
  • 13.2 Possible Global Paleoenvironmental Effects
  • 14 Residual Effects of Chesapeake Bay Impact.
  • 14.1 Hypersaline Groundwater
  • 14.2 Near-Surface Compaction Faults
  • 14.3 Surface Expression of Crater
  • 14.4 Altered River Courses
  • 14.5 Relative Change of Sea Level
  • 15 Summary and Conclusions
  • 453
  • 461
  • 489.

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