Chitinozoan biostratigraphy of the Early Caradocian Lockne impact structure, Jomtland, Sweden

Details Chitinozoan biostratigraphy of the Early Caradocian Lockne impact structure, Jomtland, Sweden Chitinozoan biostratigraphy of the Early Caradocian Lockne impact structure, Jomtland, Sweden

Nov 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997m%26ps...32..745g&link_type=abstract

Meteoritics & Planetary Science, vol. 32, no. 6, pages 745-751

Physics

4

Scientific paper

The chitinozoan biostratigraphy in seven outcrops and four drilling cores in connection with the Lockne impact structure has been investigated. The impact event took place in early Caradoc, i.e., about 460.4 Ma ago, and in beds corresponding to the lower part of the Lagenochitina dalbyensis Zone (upper Dalby Limestone). The contact between the impact-related rocks and the secular post-impact sediments can be traced all over the impact structure, and up to a distance of 50 km away from the presumed crater center. The youngest post-impact sediments in the Lockne impact structure correspond to the lower r Shale (Belonechitina hirsuta Zone).

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