@article{4026a09b76b74f5686c4377dc3f98b33,
title = "The Late Ordovician (Sandbian) Glasford structure: A marine-target impact crater with a possible connection to the Ordovician meteorite event",
abstract = "The Glasford structure in Illinois (USA) was recognized as a buried impact crater in the early 1960s but has never been reassessed in light of recent advances in planetary science. Here, we document shatter cones and previously unknown quartz microdeformation features that support an impact origin for the Glasford structure. We identify the 4 km wide structure as a complex buried impact crater and describe syn- and postimpact deposits from its annular trough. We have informally designated these deposits as the Kingston Mines unit (KM). The fossils and sedimentology of the KM indicate a marine depositional setting. The various intervals within the KM constitute a succession of breccia, carbonate, sandstone, and shale similar to marine sedimentary successions preserved in other craters. Graptolite specimens retrieved from the KM place the time of deposition at approximately 455 ± 2 Ma (Late Ordovician, Sandbian). This age determination suggests a possible link between the Glasford impact and the Ordovician meteorite shower, an increase in the rate of terrestrial meteorite impacts attributed to the breakup of the L-chondrite parent body in the main asteroid belt.",
author = "Monson, {Charles C.} and Dustin Sweet and Branimir Segvic and Giovanni Zanoni and Kyle Balling and Wittmer, {Jacalyn M.} and Ganis, {G. Robert} and Guo Cheng",
note = "Funding Information: Support was provided to C.C.M. (lithological and stratigraphic study) by the U.S. Department of Energy (DOE) through the National Energy Technology Laboratory (NETL) via the Regional Carbon Sequestration Partnership Program under Award DE‐FC26‐05NT42588, under the auspices of the Midwest Geological Sequestration Consortium (MGSC). Support was provided to C.C.M. (structural geology and planar microstructure characterization), D.S., B.S., and G.Z. as part of the Center for Geologic Storage of CO 2 (GSCO2), an Energy Frontier Research Center funded by the U.S. DOE, Office of Science, Basic Energy Sciences (BES), under Award DE‐SC0C12504. Support was provided for K.B. under a Midwest Undergraduate Research Award, and supplemental funding was provided by the Department of Geology at the University of Illinois at Urbana‐Champaign. Staff at the Illinois State Geological Survey, including Daniel Byers, Robert Mumm, Susan Krusemark, Lihang Peng, and Mingyue Yu, provided figure drafting, logistical assistance, and manuscript editing. D. King, E. Sturkell, and G. Osinski provided helpful reviews. We thank James Best, Susan Kieffer, James Lamsdell, and Steve Marshak for providing assistance and ideas. We also wish to thank Charles O'Dale for granting permission to use his photos of the Glasford site. As part of the university grant program, we acknowledge IHS for use of their Petra software to create the cross sections. Funding Information: Support was provided to C.C.M. (lithological and stratigraphic study) by the U.S. Department of Energy (DOE) through the National Energy Technology Laboratory (NETL) via the Regional Carbon Sequestration Partnership Program under Award DE-FC26-05NT42588, under the auspices of the Midwest Geological Sequestration Consortium (MGSC). Support was provided to C.C.M. (structural geology and planar microstructure characterization), D.S., B.S., and G.Z. as part of the Center for Geologic Storage of CO2 (GSCO2), an Energy Frontier Research Center funded by the U.S. DOE, Office of Science, Basic Energy Sciences (BES), under Award DE-SC0C12504. Support was provided for K.B. under a Midwest Undergraduate Research Award, and supplemental funding was provided by the Department of Geology at the University of Illinois at Urbana-Champaign. Staff at the Illinois State Geological Survey, including Daniel Byers, Robert Mumm, Susan Krusemark, Lihang Peng, and Mingyue Yu, provided figure drafting, logistical assistance, and manuscript editing. D. King, E. Sturkell, and G. Osinski provided helpful reviews. We thank James Best, Susan Kieffer, James Lamsdell, and Steve Marshak for providing assistance and ideas. We also wish to thank Charles O'Dale for granting permission to use his photos of the Glasford site. As part of the university grant program, we acknowledge IHS for use of their Petra software to create the cross sections. Publisher Copyright: {\textcopyright} The Meteoritical Society, 2019.",
year = "2019",
month = dec,
day = "1",
doi = "10.1111/maps.13401",
language = "English",
volume = "54",
pages = "2927--2950",
journal = "Meteoritics and Planetary Science",
issn = "1086-9379",
number = "12",
}