Deep Drilling into the Chesapeake Bay Impact Structure

  title={Deep Drilling into the Chesapeake Bay Impact Structure},
  author={Gregory Gohn and Christian Koeberl and Kenneth G. Miller and Wolf Uwe Reimold and James V. Browning and Charles S. Cockell and J. Wright Horton and Thomas Kenkmann and Alexander A. Kulpecz and David S. Powars and Ward E. Sanford and Mary A. Voytek},
  pages={1740 - 1745}
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… 
Petrographic Studies of Rocks from The Chesapeake Bay Impact Structure (USA): Implication for Moderate Shock Pressures in Sedimentary Breccias
Shock petrographic investigations were carried out on samples collected from drill cores from the Chesapeake Bay impact structure (USA). The late Eocene Chesapeake impact structure is, at 85 km
Deep drilling in the Chesapeake Bay impact structure—An overview
The late Eocene Chesapeake Bay impact structure lies buried at moderate depths below Chesapeake Bay and surrounding landmasses in southeastern Virginia, USA. Numerous characteristics made this impact
Pore-water chemistry from the ICDP-USGS core hole in the Chesapeake Bay impact structure—Implications for paleohydrology, microbial habitat, and water resources
We investigated the groundwater system of the Chesapeake Bay impact structure by analyzing the pore-water chemistry in cores taken from a 1766-m-deep drill hole 10 km north of Cape Charles, Virginia.
Sequence stratigraphy of the mid-Atlantic coastal plain: An evaluation of eustasy, sediment supply variations, and passive-aggressive tectonism
OF THE DISSERTATION Sequence Stratigraphy of the mid-Atlantic Coastal Plain: An Evaluation of Eustasy, Sediment Supply Variations, and Passive-Aggressive Tectonism By ANDREW A. KULPECZ Dissertation
A chemostratigraphic method to determine the end of impact‐related sedimentation at marine‐target impact craters (Chesapeake Bay, Lockne, Tvären)
Abstract– To better understand the impact cratering process and its environmental consequences at the local to global scale, it is important to know when in the geological record of an impact crater
Effects of Impact Cratering on the Microbial Biosphere of the Deep Terrestrial Subsurface
The 2005 ICDP-USGS deep drilling of the Chesapeake Bay Impact Structure (CBIS) returned the first complete core through an impact structure. A strict set of contamination assessment measures were
Impact disruption and recovery of the deep subsurface biosphere.
Results show how, by fracturing subsurface rocks, impacts can extend the depth of the biosphere and show that the deeply fractured regions of impact craters are promising targets to study the past and present habitability of Mars.
Early modification stage (preresurge) sediment mobilization in the Lockne concentric, marine‐target crater, Sweden
Lockne is a concentric impact structure due to a layered target where weak sediments and seawater covered a crystalline basement. A matrix‐supported, sedimentary breccia is interlayered between the


Chesapeake Bay impact structure drilled
The Chesapeake Bay impact structure was formed by a meteorite crashing to Earth during the late Eocene, about 35.5 million years ago (Ma). In May 2006, a scientific drilling project, sponsored by the
Impact effects and regional tectonic insights: Backstripping the Chesapeake Bay impact structure
The Chesapeake Bay impact structure is a ca. 35.4 Ma crater located on the eastern sea- board of North America. Deposition returned to normal shortly after impact, resulting in a unique record of
Impact Origin of the Chesapeake Bay Structure and the Source of the North American Tektites
Seismic profiles, drill core samples, and gravity data suggest that a complex impact crater ∼35.5 million years old and 90 kilometers in diameter is buried beneath the lower Chesapeake Bay. The
Establishing the link between the Chesapeake Bay impact structure and the North American tektite strewn field: The Sr‐Nd isotopic evidence
Abstract— The Chesapeake Bay impact structure, which is about 35 Ma old, has previously been proposed as the possible source crater of the North American tektites (NAT). Here we report major and
A simulation of the hydrothermal response to the Chesapeake Bay bolide impact
Groundwater more saline than seawater has been discovered in the tsunami breccia of the Chesapeake Bay Impact Crater. One hypothesis for the origin of this brine is that it may be a liquid residual
Drilling and Dating New Jersey Oligocene-Miocene Sequences: Ice Volume, Global Sea Level, and Exxon Records
Oligocene to middle Miocene sequence boundaries on the New Jersey coastal plain (Ocean Drilling Project Leg 150X) and continental slope (Ocean Drilling Project Leg 150) were dated by integrating
How big was the Chesapeake Bay impact? Insight from numerical modeling
The Chesapeake Bay impact structure, Virginia, is the largest impact crater in the United States. The important question of how large the impactor was that formed the crater remains unanswered. This
Reconstruction of the Chicxulub ejecta plume from its deposits in drill core Yaxcopoil-1
Formation conditions of suevite-like impactites from an ∼100 m thick drill core sequence through the Cretaceous-Tertiary Chicxulub crater were reconstructed from empirical data obtained by petrologic
Deep bacterial biosphere in Pacific Ocean sediments
ALTHOUGH around 70% of the Earth's surface is marine, little is known about the microbiology of underlying sediments, which can be more than a kilometre deep1. Selective degradation of organic matter
Origin and emplacement of the impact formations at Chicxulub, Mexico, as revealed by the ICDP deep drilling at Yaxcopoil-1 and by numerical modeling
We present and interpret results of petrographic, mineralogical, and chemical analyses of the 1511 m deep ICDP Yaxcopoil‐1 (Yax‐1) drill core, with special emphasis on the impactite units. Using