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Hummeln impact structure

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Simplified geological map of the <b>Hummeln</b> <b>impact</b> <b>structure</b>, Sweden (modified...
in > Geology
Published: 01 April 2015
Figure 1. Simplified geological map of the Hummeln impact structure, Sweden (modified from Ormö et al., 1999 ; Lindström et al., 1999 ; completed during our 2012 field campaign). Other verified Ordovician impact structures in Baltoscandia are marked with stars in the inset.
Series: GSA Special Papers
Published: 30 June 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...
Journal Article
Journal: Geology
Published: 01 April 2015
Geology (2015) 43 (4): 279–282.
...Figure 1. Simplified geological map of the Hummeln impact structure, Sweden (modified from Ormö et al., 1999 ; Lindström et al., 1999 ; completed during our 2012 field campaign). Other verified Ordovician impact structures in Baltoscandia are marked with stars in the inset. ...
FIGURES
Journal Article
Journal: GSA Bulletin
Published: 30 June 2017
GSA Bulletin (2017) 129 (11-12): 1442–1449.
....2006.10.034. Alwmark , C. , Ferrière , L. , Holm-Alwmark , S. , Ormö , J. , Leroux , H. , and Sturkell , E. , 2015 , An impact origin for the Hummeln structure (Sweden) and its link to the Ordovician disruption of the L-chondrite parent body : Geology , v. 43 , p. 279 – 282...
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Series: GSA Special Papers
Published: 01 January 2007
DOI: 10.1130/2008.2437(02)
... The Gardnos structure in Hallingdal, Norway, is a 5 km in diameter, eroded impact crater of probably late Precambrian age. Within the structure, both impactites and postimpact crater sediments are preserved. The sediments comprise a wide range of siliciclastics: (1) postimpact breccias, (2...
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Journal Article
Published: 01 January 2000
Geological Magazine (2000) 137 (1): 67–80.
... of the impact structures discussed are shown in Figure 1 . The Lockne, Kärdla, Granby, Hummeln and Tvären craters are preserved in the marine Lower Palaeozoic sediments of the Baltic Shield. The structures are identified as marine-target impact craters, because marine sediments of the same facies were...
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Journal Article
Journal: GSA Bulletin
Published: 01 July 2010
GSA Bulletin (2010) 122 (7-8): 1039–1046.
... for merrillite in chondrites. The ca. 466 Ma Osmussaar breccia does not correspond to any known impact structure of this age in Baltoscandia, except for two supposed impact craters in Sweden: the 4-km-diameter Granby structure and the 1-km-diameter Hummeln structure, both of which are too small and too far...
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Journal Article
Published: 28 May 2014
Journal of the Geological Society (2014) 171 (4): 481–492.
... ) prompted Maillot et al . (1999) to develop a numerical model of the initiation, growth and radiation of shear failures induced by pore pressure changes in a poroelastic medium. Otherwise, simulation of stress transmission is either confined to the seismogenic source structure and greatly simplified...
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