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kenkmann

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Published: 01 January 2005
DOI: 10.1130/0-8137-2384-1.85
Image
Map showing the geographic position of the Jake Seller Draw (JSD) impact structure in relation to the Wyoming secondary crater field (SM—Sheep Mountain; MC—Mule Creek; FR—Fetterman Ridge; PCR—Palmer Canyon Road; WR—Wagonhound Ridge) and the proposed location of the primary crater by [1] Kenkmann et al. (2022). ArcGIS base map. WY—Wyoming; SD—South Dakota; NE—Nebraska; CO—Colorado.
Published: 21 February 2024
] Kenkmann et al. (2022) . ArcGIS base map. WY—Wyoming; SD—South Dakota; NE—Nebraska; CO—Colorado.
Journal Article
Journal: Geology
Published: 27 December 2024
Geology (2025) 53 (3): 279–283.
...Michael H. Poelchau; Rebecca Winkler; Thomas Kenkmann; Richard Wirth; Robert Luther; Frank Schäfer Abstract In abrupt and extreme loading events, such as meteorite impact or explosions, minerals undergo unique crystallographic changes known as shock metamorphism. The discovery of terrestrial impact...
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Image
Figure 6. Central uplift structure mapped at base Cretaceous. (A) Jurassic isochore made by subtracting the base Cretaceous depth map from the top Triassic depth map. (B) Structural dip map made on (A) to emphasize structural elements. (C) 3D rendered image of the base Cretaceous to show the conical uplift and radial fault set. (D) (i) Interpreted structural elements from maps (A, B). (ii) For comparison, generic model of a complex impact crater floor, after Figure 1 of Kenkmann (2002)
Published: 01 March 2005
the conical uplift and radial fault set. (D) (i) Interpreted structural elements from maps (A, B). (ii) For comparison, generic model of a complex impact crater floor, after Figure 1 of Kenkmann (2002)
Journal Article
Journal: GSA Bulletin
Published: 21 February 2024
GSA Bulletin (2024) 136 (9-10): 3673–3689.
...] Kenkmann et al. (2022) . ArcGIS base map. WY—Wyoming; SD—South Dakota; NE—Nebraska; CO—Colorado. ...
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Journal Article
Published: 01 April 2025
Jour. Geol. Soc. India (2025) 101 (4): 453–460.
... impacts are oblique, with 45° being the most probable impact angle on planetary surfaces ( Pierazzo and Crawford, 1997 ; Scherler et al., 2006 ; Poelchau and Kenkmann, 2008 ; Andrews-Hanna and Zuber, 2010 ; Stickle and Schultz, 2012 ). One of the most important effects of an oblique impact is the non...
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Journal Article
Published: 01 December 2023
Reviews in Mineralogy and Geochemistry (2023) 89 (1): 339–371.
...Gordon R. Osinski; H. Jay Melosh; Jeff Andrews-Hanna; David Baker; Brett Denevi; Deepak Dhingra; Rebecca Ghent; Paul O. Hayne; Patrick Hill; Peter B. James; Steven Jaret; Brandon Johnson; Thomas Kenkmann; David Kring; Prasun Mahanti; David Minton; Catherine D. Neish; Greg Neumann; Jeff Plescia...
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Journal Article
Journal: Geology
Published: 01 March 2008
Geology (2008) 36 (3): 227–230.
...Elmar Buchner; Thomas Kenkmann Abstract Upheaval Dome is a unique circular structure on the Colorado Plateau in SE Utah, the origin of which has been controversially discussed for decades. It has been interpreted as a crypto volcanic feature, a salt diapir, a pinched-off salt diapir, and an eroded...
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Journal Article
Journal: GSA Bulletin
Published: 11 February 2022
GSA Bulletin (2022) 134 (9-10): 2469–2484.
...Thomas Kenkmann; Louis Müller; Allan Fraser; Doug Cook; Kent Sundell; Auriol S.P. Rae Abstract A large number of small impact structures have been discovered in Wyoming, USA, and we raise the question of how this accumulation occurred. We document 31 crater structures of 10–70 m diameter...
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Series: GSA Special Papers
Published: 02 August 2021
DOI: 10.1130/2021.2550(16)
EISBN: 9780813795508
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Series: GSA Special Papers
Published: 02 August 2021
DOI: 10.1130/2021.2550(19)
EISBN: 9780813795508
... of an oblique impact and have identified up-range and down-range zones ( Shoemaker and Shoemaker, 1985 , 1996 ; Kenkmann and Poelchau, 2013 ; Kenkmann et al., 2014) . The geology of the central uplift exposes mainly the Warton Sandstone (1786 ± 14–1704 ± 7 Ma) and Pentecost Sandstone (1774 ± 9–1704 ± 14 Ma...
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Series: GSA Special Papers
Published: 02 August 2021
DOI: 10.1130/2021.2550(03)
EISBN: 9780813795508
... is currently not contained in the Earth Impact Database (2020) , which contains 27 entries for Australia, but it is listed in Dunster et al. (2014) , Kenkmann (2019) , and the atlas of terrestrial impact structures ( Gottwald et al., 2020) . Intense folding and faulting were recognized in the region...
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Book Chapter

Series: GSA Special Papers
Published: 02 August 2021
DOI: 10.1130/2021.2550(28)
EISBN: 9780813795508
...., 2011 ; Kenkmann and Wulf, 2018) . The terminology for the so-called “layered” or “rampart” craters is still a matter of debate (see discussion in Robbins et al., 2018 ), but we will follow the widely used and intuitive classification of Barlow et al. (2000) . Here, the craters are commonly...
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Series: GSA Special Papers
Published: 02 August 2021
DOI: 10.1130/2021.2550(21)
EISBN: 9780813795508
... of the planar fracture at an angle >35°. They form when planar fractures are activated as shear planes and indicate high differential stresses ( Poelchau and Kenkmann, 2011 ; Ebert et al., 2020) . In an experimentally shocked quartz-feldspar assembly, Poelchau and Kenkmann (2011) observed that feather...
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Journal Article
Journal: Geology
Published: 18 May 2020
Geology (2020) 48 (8): 814–818.
...Matthias Ebert; Michael H. Poelchau; Thomas Kenkmann; Bennet Schuster Abstract The Chicxulub crater (Yucatán Peninsula, Mexico) is considered exceptional in many scientific aspects; morphologically it is the only known impact structure on Earth with a well-preserved peak ring. Recent drilling...
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Series: European Mineralogical Union Notes in Mineralogy
Publisher: European Mineralogical Union
Published: 01 January 2015
DOI: 10.1180/EMU-notes.15.4
EISBN: 9780903056564
... have been discussed by Deutsch and Scharer (1994) , and Jourdan et al. (2012) , and cratering mechanics have been reviewed recently by Kenkmann et al. (2014) . Answers to the frequently asked questions “is it a crater?” and “is the mineral shocked?” were given by French and Koeberl (2010...
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Journal Article
Journal: Geology
Published: 01 May 2013
Geology (2013) 41 (5): 531–534.
...Sebastian Sturm; Gerwin Wulf; Dietmar Jung; Thomas Kenkmann Abstract The ejecta blankets of impact craters formed on a planetary body that is free of significant quantities of volatiles show substantial differences from those formed on a volatile-rich planetary body. Craters in volatile-rich...
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Published: 01 September 2010
DOI: 10.1130/2010.2465(23)
Journal Article
Journal: Geology
Published: 01 May 2009
Geology (2009) 37 (5): 459–462.
...Thomas Kenkmann; Michael H. Poelchau Abstract Nearly all meteorite impact craters on Earth are circular. However, ~4% of craters should be formed by impacts at angles lower than 12° from the horizontal, which should result in elongated crater structures. The crater-forming process that produces...
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