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Rock Elm Crater

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Journal Article
Journal: Geology
Published: 01 April 2015
Geology (2015) 43 (4): 315–318.
... in brecciated sandstone from the Ordovician Rock Elm impact crater in Wisconsin, United States. Electron backscatter diffraction mapping was used to identify reidite and microtwins within shocked zircons smaller than 50 µm in diameter. Reidite occurs both as 200–500-nm-wide lamellar intergrowths...
FIGURES
Image
Figure 1. Generalized geologic map of the <span class="search-highlight">Rock</span> <span class="search-highlight">Elm</span> structure, Pierce County...
Published: 01 January 2004
, Cambrian Mt. Simon(?) Sandstone, which normally lies at least 250 m below the surface, is exposed in contact with the Rock Elm Shale (Or), a sedimentary unit interpreted as crater fill. The southern fault block occurs along the south-southwest margin, surrounding the “Op” symbol. For details of elevation
Journal Article
Journal: GSA Bulletin
Published: 01 January 2004
GSA Bulletin (2004) 116 (1-2): 200–218.
..., Cambrian Mt. Simon(?) Sandstone, which normally lies at least 250 m below the surface, is exposed in contact with the Rock Elm Shale (Or), a sedimentary unit interpreted as crater fill. The southern fault block occurs along the south-southwest margin, surrounding the “Op” symbol. For details of elevation...
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Journal Article
Journal: Geology
Published: 27 September 2018
Geology (2018) 46 (11): 983–986.
... at the Ordovician Rock Elm impact crater : Geology , v. 43 , p. 315 – 318 , https://doi.org/10.1130/G36489.1 . Erickson , T.M. , Cavosie , A.J. , Moser , D.E. , Barker , I.R. , and Radovan , H.A. 2013 , Correlating planar microstructures in shocked zircon from the Vredefort Dome...
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Journal Article
Journal: GSA Bulletin
Published: 08 August 2018
GSA Bulletin (2018) 130 (11-12): 2062–2086.
... localities could be explained in at least three ways: (1) the difference is a random artifact of the small number of Decorah samples examined; (2) the Rock Elm samples were collected from in-place bedrock located below the final crater floor, where relatively lower shock pressures would be expected ( Dence...
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Series: GSA Field Guide
Published: 01 January 2011
DOI: 10.1130/2011.0024(19)
EISBN: 9780813756240
... the deformed dolostones with little-deformed Rock Elm Shale. Melosh (1989), Koeberl and Anderson (1996), French (1998), French and Koeberl (2010), and many others document the geologic features associated with meteorite impact craters. Many of these features occur at Rock Elm. Impact craters are often...
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Journal Article
Published: 24 September 2018
Journal of the Geological Society (2018) 175 (6): 865–874.
... craters of similar age in North America ( Liu et al . 2009 ; Schmieder et al . 2015 ): could others also host exceptionally preserved fossils? The Middle Ordovician Rock Elm structure in Wisconsin is about the same size as the Decorah structure. The Rock Elm Shale, which is confined to the crater, has...
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Journal Article
Journal: Geology
Published: 05 April 2021
Geology (2021) 49 (7): 755–760.
... ). Until now, reidite has only been observed in simple and central-peak impact craters, such as Chesapeake Bay (northeastern USA), Haughton (Canada), Ries (Germany), Rock Elm (northeastern USA), Woodleigh (Western Australia), and Xiuyan (China) ( Wittmann et al., 2009 ; Chen et al., 2013 ; Cavosie et al...
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Journal Article
Journal: GSA Bulletin
Published: 01 December 2001
GSA Bulletin (2001) 113 (12): 1505–1521.
...{amssymb} \usepackage{amsfonts} \usepackage{amsmath} \pagestyle{empty} \begin{document} \({\delta}^{18}O_{H_{2}O}\) \end{document} values are from clays very close to Tuff IF, in both the CB and ELM ( Table 5 ). Illite of the alluvial-plain deposits below lacustrine sedimentary rocks (ap-1) has...
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Journal Article
Journal: Geology
Published: 01 October 2015
Geology (2015) 43 (10): 899–902.
... in Germany ( Gucsik et al., 2004 ; Wittmann et al., 2006 ), ejecta from the ca. 35 Ma Chesapeake Bay crater in Virginia (USA; Glass and Liu, 2001 ), and the ca. 450 Ma Rock Elm impact crater in Wisconsin (USA; Cavosie et al., 2015 ). Studies indicate that reidite forms under shock-induced pressures >30...
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Journal Article
Journal: GSA Bulletin
Published: 21 October 2022
GSA Bulletin (2023) 135 (7-8): 1635–1651.
... al., 2019 ) but do not affect the observed induration of the rock. RL and vitrophyre is composed of Si-rich volcanic glass (the same composition as glass in all other Barnwell and Disko Elm samples), where the majority or all of the matrix of the unit is vitric (i.e., no devitrification...
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Journal Article
Published: 01 June 1985
Journal of the Geological Society (1985) 142 (3): 491–499.
...William Arthur Watts Abstract A pollen diagram from Lake Monticchio, a volcanic crater lake in S Central Italy east of Naples, shows a long vegetation record for the Holocene and the later portion of the Last (Weichselian) Glacial Period. The upper 735 cm of a 2550-cm core is assigned...
Journal Article
Journal: Geology
Published: 01 April 2019
Geology (2019) 47 (4): e460.
... pattern: paleosol may develop on materials that were deposited during a cold period due to down-going pedogenesis (see, e.g., Zhou and Shackleton, 1999). Thenceforth, the possible 10Be stratigraphy of BJD invoked by Mizera becomes problematic. In our tropical soil over old rock scenario, the fact...
Journal Article
Journal: Geology
Published: 01 September 2016
Geology (2016) 44 (9): 703–706.
...) is a 1.2-km-diameter simple crater ( Fig. 1A ) that formed ∼49 k.y. ago in northern Arizona ( Shoemaker, 1963 ; Kring, 2007 ). The impact punctured Permian and Triassic sedimentary rocks, however the CS has received the most study for effects of shock metamorphism, as most other lithologies at Meteor...
Series: GSA Special Papers
Published: 02 August 2021
DOI: 10.1130/2021.2550(17)
EISBN: 9780813795508
... the Rock Elm and Kentland structures are deeply eroded complex craters, and the samples with shock-twinned zircon originated from the central uplifts. At the Rock Elm impact structure, no PDFs in quartz have been conclusively identified; however, PFs with indexed orientations are abundant ( French et al...
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Journal Article
Journal: Geology
Published: 20 December 2017
Geology (2018) 46 (3): 203–206.
... CITED Cavosie , A.J. , Erickson , T.M. , and Timms , N.E. , 2015a , Nanoscale records of ancient shock deformation: Reidite (ZrSiO 4 ) in sandstone at the Ordovician Rock Elm impact crater : Geology , v. 43 , p. 315 – 318 , https://doi.org/10.1130/G36489.1 . Cavosie , A.J...
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Journal Article
Published: 01 August 2023
American Mineralogist (2023) 108 (8): 1516–1529.
...: Reidite (ZrSiO 4 ) in sandstone at the Ordovician Rock Elm impact crater . Geology , 43 , 315 – 318 , https://doi.org/10.1130/G36489.1 . Cavosie , A.J. , Erickson , T.M. , Timms , N.E. , Reddy , S.M. , Talavera , C. , Montalvo , S.D. , Pincus , M.R. , Gibbon , R.J...
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Journal Article
Journal: GSA Bulletin
Published: 01 May 2014
GSA Bulletin (2014) 126 (5-6): 720–737.
... shocked quartz grains with PDFs in sandstone that were interpreted to originate from a fluvially reworked local ejecta layer sourced from the Chesapeake Bay impact ( Harris et al., 2004 ). Detrital shocked quartz with PFs was recently reported from alluvium within the Rock Elm impact structure (USA; Roig...
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Journal Article
Journal: GSA Bulletin
Published: 16 March 2022
GSA Bulletin (2022) 134 (11-12): 3022–3048.
... in map view as a massive 50 km × 100 km large body surrounded by the rocks of the Dala Province to the south and the Svecofennian supracrustal rocks and the Revsund granite to the north ( Mattsson and Elming, 2001b , 2001a ). The limit between the Rätan granite and the Dala Province to the south appears...
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Journal Article
Journal: Geology
Published: 01 August 2016
Geology (2016) 44 (8): 635–638.
... : Geology , v. 43 , p. 999 – 1002 , doi:10.1130/G37059.1. Cavosie , A.J. , Erickson , T.M. , and Timms , N.E. , 2015b , Nanoscale records of ancient shock deformation: Reidite (ZrSiO 4 ) in sandstone at the Ordovician Rock Elm impact crater : Geology , v. 43 , p. 315 – 318 , doi...