J. Wright Horton
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Rift Basins and Intraplate Earthquakes: New High‐Resolution Aeromagnetic Data Provide Insights Into Buried Structures of the Charleston, South Carolina Seismic Zone Open
The delineation of faults that pose seismic risk in intraplate seismic zones and the mapping of features associated with failed rift basins can help our understanding of links between the two. We use new high‐resolution aeromagnetic data, …
Shallow Faulting and Folding in the Epicentral Area of the 1886 Charleston, South Carolina, Earthquake Open
The moment magnitude (Mw) ∼7 earthquake that struck Charleston, South Carolina, on 31 August 1886 is the largest historical earthquake in the United States east of the Appalachian Mountains. The fault(s) that ruptured during this earthquak…
View article: Geologic map of the South Boston 30' × 60' quadrangle, Virginia and North Carolina
Geologic map of the South Boston 30' × 60' quadrangle, Virginia and North Carolina Open
First posted March 18, 2022 For additional information, contact: Florence Bascom Geoscience CenterU.S. Geological SurveyMail Stop 926A12201 Sunrise Valley DriveReston, VA 20192Contact Pubs Warehouse This 1:100,000-scale geologic map of the…
Ten Years on from the Quake That Shook the Nation’s Capital Open
A decade of study into the Virginia earthquake that damaged D.C. and reverberated up and down the Atlantic coast in 2011 has shed light on rare, but risk-laden, seismicity in eastern North America.
View article: Dendritic reidite from the Chesapeake Bay impact horizon, Ocean Drilling Program Site 1073 (offshore northeastern USA): A fingerprint of distal ejecta?
Dendritic reidite from the Chesapeake Bay impact horizon, Ocean Drilling Program Site 1073 (offshore northeastern USA): A fingerprint of distal ejecta? Open
High-pressure minerals provide records of processes not normally preserved in Earth’s crust. Reidite, a quenchable polymorph of zircon, forms at pressures >20 GPa during shock compression. However, there is no broad consensus among empi…
View article: (U‐Th)/He zircon dating of Chesapeake Bay distal impact ejecta from ODP site 1073
(U‐Th)/He zircon dating of Chesapeake Bay distal impact ejecta from ODP site 1073 Open
Single crystal (U‐Th)/He dating has been undertaken on 21 detrital zircon grains extracted from a core sample from Ocean Drilling Project (ODP) site 1073, which is located ~390 km northeast of the center of the Chesapeake Bay impact struct…
Chesapeake Bay Impact Structure—Development of “Brim” Sedimentation in a Multilayered Marine Target Open
The late Eocene Chesapeake Bay impact structure was formed in a multilayered target of seawater underlain sequentially by a sediment layer and a rock layer in a continental-shelf environment. Impact effects in the “brim” (annular trough) s…
Chesapeake Bay Impact Structure—Development of “Brim” Sedimentation in a Multilayered Marine Target Open
The late Eocene Chesapeake Bay impact structure was formed in a multilayered target of seawater underlain sequentially by a sediment layer and a rock layer in a continental-shelf environment. Impact effects in the "brim" (annular trough) s…
View article: Geologic map of the Washington West 30’ × 60’ quadrangle, Maryland, Virginia, and Washington D.C.
Geologic map of the Washington West 30’ × 60’ quadrangle, Maryland, Virginia, and Washington D.C. Open
First posted January 2, 2018 For additional information, contact: Eastern Geology and Paleoclimate Science Center U.S. Geological Survey 12201 Sunrise Valley Drive 926A National Center Reston, VA 20192 The Washington West 30' × 60' quadran…
Centimeter-scale surface deformation caused by the 2011 Mineral, Virginia, earthquake sequence at the Carter farm site—Subsidiary structures with a quaternary history Open
First posted August 25, 2016 For additional information, contact: Eastern Geology and Paleoclimate Science Center U.S. Geological Survey 926A National Center 12201 Sunrise Valley Drive Reston, VA 20192 http://geology.er.usgs.gov/egpsc/ Cen…