Edinburgh Research Explorer

Deep drilling into the Chesapeake Bay impact structure

Research output: Contribution to journalArticle

  • G. S. Gohn
  • C. Koeberl
  • K. G. Miller
  • W. U. Reimold
  • J. V. Browning
  • C. S. Cockell
  • J. W. Horton
  • T. Kenkmann
  • A. A. Kulpecz
  • D. S. Powars
  • W. E. Sanford
  • M. A. Voytek
  • Charles Cockell

Related Edinburgh Organisations

Original languageEnglish
Pages (from-to)1740-1745
Number of pages6
JournalScience
Volume320
Issue number5884
DOIs
StatePublished - 27 Jun 2008

Abstract

Samples from a 1.76- kilometer- deep corehole drilled near the center of the late Eocene Chesapeake Bay impact structure ( Virginia, USA) reveal its geologic, hydrologic, and biologic history. We conducted stratigraphic and petrologic analyses of the cores to elucidate the timing and results of impact- melt creation and distribution, transient- cavity collapse, and ocean- water resurge. Comparison of post- impact sedimentary sequences inside and outside the structure indicates that compaction of the crater fill influenced long- term sedimentation patterns in the mid- Atlantic region. Salty connate water of the target remains in the crater fill today, where it poses a potential threat to the regional groundwater resource. Observed depth variations in microbial abundance indicate a complex history of impact- related thermal sterilization and habitat modification, and subsequent post- impact repopulation.

    Research areas

  • GLOBAL SEA-LEVEL, SUBSEAFLOOR SEDIMENTS, BOLIDE IMPACT, YAXCOPOIL-1, CHICXULUB, ORIGIN, LIFE

ID: 1499663