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Tvaren Crater

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Journal Article
Published: 01 January 1994
Geological Magazine (1994) 131 (1): 91–103.
Journal Article
Published: 04 August 2010
Geological Magazine (2011) 148 (2): 269–287.
...MATS E. ERIKSSON; ÅSA M. FRISK Abstract The post-impact Dalby Limestone (Kukruse; Upper Ordovician) of the Tvären crater, southeastern Sweden, has been analysed with regards to polychaetes, as represented by scolecodonts. A palaeoecological succession is observed in the Tvären-2 drill core sequence...
Journal Article
Journal: Geology
Published: 05 September 2022
Geology (2022) 50 (12): 1331–1335.
... Magazine , v. 137 , p. 67 – 80 , https://doi.org/10.1017/S0016756800003538 . Ormö , J. , Sturkell , E. , and Lindström , M. , 2007 , Sedimentological analysis of resurge deposits at the Lockne and Tvären craters: Clues to flow dynamics : Meteoritics & Planetary Science , v. 42...
FIGURES
Series: GSA Special Papers
Published: 02 August 2021
DOI: 10.1130/2021.2550(01)
EISBN: 9780813795508
... that such small impact structures can only be preserved for approximately a couple of thousand to a few million years. The Lockne-Målingen, Tvären, Granby, and Hummeln impact structures all have ages that place their formation in a period of proposed increased cratering rate on Earth following the breakup event...
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Series: GSA Special Papers
Published: 01 September 2010
DOI: 10.1130/2010.2465(06)
... Water resurge into newly excavated impact craters causes both erosion and conspicuous graded deposits in those cases where the water is deep enough to overrun the elevated crater rim. We compare published information on resurge deposits from mainly the Lockne, Tvären, and Chesapeake Bay...
Journal Article
Published: 20 February 2023
Geological Magazine (2023) 160 (4): 794–802.
... ). Relatively thick graded deposits of often suevitic character (i.e. significant melt particle content) are known to represent the uppermost parts of the impact-generated infill sequences in marine target craters, e.g. Lockne, Tvären, Chesapeake Bay, Flynn Creek, Wetumpka, Chicxulub (see summary in Ormö et al...
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Image
Simplified scheme of the Cambrian and Ordovician of Baltoscandia with strat...
Published: 01 July 2010
Figure 8. Simplified scheme of the Cambrian and Ordovician of Baltoscandia with stratigraphic position of impact craters, Kinnekulle meteorites, and Osmussaar breccia. Age, global standard, and IGCP410 time slices are from Webby et al. (2004) . Biostratigraphy zones are according to Mens
Journal Article
Journal: The Leading Edge
Published: 01 August 2012
The Leading Edge (2012) 31 (8): 892–897.
... (Tvären Bay, Sweden) show similar depositional elements in the crater fill section ( Dypvik and Jansa, 2003 ). Similarities exist in the Bear Swamp crater ( Figure 7 ) where chaotic and brecciated zones are evident on the image logs nearly up to the top of the crater fill section. Boulder-sized clasts...
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Journal Article
Journal: Elements
Published: 01 February 2012
Elements (2012) 8 (1): 49–53.
...). In addition, it has been proposed that a series of eight impact craters might be directly related to this event, based on ages of ~470–450 Ma. Chitinozoan and graptolite biostratigraphy suggests that Kärdla, Tvären, and Lockne, three of these eight impacts, occurred at the beginning of the Caradocian (~461 Ma...
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Journal Article
Journal: Economic Geology
Published: 01 May 2019
Economic Geology (2019) 114 (3): 427–440.
... and Tvären craters: Clues to flow dynamics : Meteoritics and Planetary Science , v. 42 , p. 1929 – 1943 . O’Rourke , A.J. , Johnson , B.N.B. , and King , S. , 2017 , Century Zn-Pb-Ag deposits , in Phillips , G.N. , ed., Australian ore deposits : Melbourne , Australasian...
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Journal Article
Published: 08 June 2016
Geological Magazine (2017) 154 (4): 683–706.
... of the Tvären meteorite crater south of Stockholm, Sweden. The existence of this reef is highly questionable. Flodén et al. ( 2001 ) refer to a paper by Lindström et al. ( 1994 ), where biohermal deposits are not mentioned but instead a faunal list of the upper third of the crater infill is given...
Journal Article
Journal: GSA Bulletin
Published: 01 July 2010
GSA Bulletin (2010) 122 (7-8): 1039–1046.
...Figure 8. Simplified scheme of the Cambrian and Ordovician of Baltoscandia with stratigraphic position of impact craters, Kinnekulle meteorites, and Osmussaar breccia. Age, global standard, and IGCP410 time slices are from Webby et al. (2004) . Biostratigraphy zones are according to Mens...
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Journal Article
Journal: Palynology
Published: 01 June 2012
Palynology (2012) 36 (Suppl_1): 80–95.
... at the Lockne and Tvären craters: Clues to flow dynamics . Meteoritics and Planetary Science 42 , 1929 – 1943 . Pedersen K . 1993 . The deep subterranean biosphere . Earth Science Reviews 34 , 243 – 260 . Reimold WU Bartosova K Schmitt RT Hansen B Crasselt C...
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Journal Article
Journal: GSA Bulletin
Published: 09 July 2021
GSA Bulletin (2022) 134 (3-4): 895–927.
.../10.1130/0-8137-2307-8.75 . Ormö , J. , Sturkell , E. , and Lindström , M. , 2007 , Sedimentological analysis of resurge deposits at the Lockne and Tvären craters: Clues to flow dynamics : Meteoritics & Planetary Science , v. 42 , p. 1929 – 1943 , https://doi.org/10.1111/j.1945...
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Series: GSA Special Papers
Published: 21 June 2022
DOI: 10.1130/2022.2557(18)
EISBN: 9780813795577
... in shallow intracratonic seas during high sea levels. Some of the buried craters are very small, such as Tvären (2 km) and Hummeln (1.2 km) in Sweden, which would not have been found were it not for the ambitious crater searches by Nordic Earth scientists (see Dypvik et al., 2008) . We note that sea levels...
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Series: Geological Society, London, Special Publications
Published: 01 January 2006
DOI: 10.1144/GSL.SP.2006.256.01.22
EISBN: 9781862395046
... Abstract Robert Hooke in the 17th century was the first scientist to consider the possibility of meteorite impact cratering, when looking at the lunar craters. Gilbert in the late 19th century considered it again when studying ‘Coon Butte’ (now known as ‘Meteor Crater’), Arizona, but attributed...
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Series: SEPM Special Publication
Published: 01 January 2014
DOI: 10.2110/sepmsp.105.04
EISBN: 9781565763241
... of data precludes the development of a detailed depositional model based on the comparison of the fill from several impact craters. In addition, Chicxulub is unique as a large-scale impact in a carbonate platform environment. The target rocks of the relatively small Lockne and Tvaren craters (<10 km...
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Journal Article
Journal: Paleobiology
Published: 01 August 2020
Paleobiology (2020) 46 (3): 405–433.
... partitioning in the Tvaren Crater system, Sweden . Palaeogeography, Palaeoclimatology, Palaeoecology 369 : 114 – 124 . Grant , R. E . 1966 . Spine arrangement and life habits of the productoid brachiopod Waagenoconcha . Journal of Paleontology 40 : 1063 – 1069 . Grant , R. E...
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Series: Geological Society, London, Special Publications
Published: 10 May 2023
DOI: 10.1144/SP532-2022-157
EISBN: 9781786209641
... parts of the area, up to 88 m ( Lindström et al. 2005 ). The same phenomenon is seen in the coeval Tvären crater near Stockholm, where the post-impact ‘Dalby Limestone’ is nearly 70 m thick ( Frisk and Harper 2011 ). In the Lower Allochthon of Jämtland, the uppermost part of the ‘Upper Member...
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