Drilling of the Mjølnir Structure, the Barents Sea: Workshop on Marine Impacts and Environmental Consequences; Longyearbyen, Norway, 10–13 September 2007
Article first published online: 3 JUN 2011
©2008. American Geophysical Union. All Rights Reserved.
Eos, Transactions American Geophysical Union
Volume 89, Issue 2, page 15, 8 January 2008
How to Cite
2008), Drilling of the Mjølnir Structure, the Barents Sea: Workshop on Marine Impacts and Environmental Consequences; Longyearbyen, Norway, 10–13 September 2007, Eos Trans. AGU, 89(2), 15–15, doi:10.1029/2008EO020004., , , , , and (
- Issue published online: 3 JUN 2011
- Article first published online: 3 JUN 2011
- Cited By
In September 2007, thirty-three scientists attended an international workshop in Norway to discuss impacts into marine targets and prepare the drilling of the 142-million-year-old Mjølnir impact structure in the Barents Sea. The workshop focused on (1) mechanisms of marine impact cratering, including ejecta distribution, geothermal reactions, and tsunami production, and (2) environmental effects of marine impacts and potential links to the Jurassic/Cretaceous boundary (about 145 to 140 million years ago). A field trip visited the ejecta layer in Svalbard's Janusfjellet mountain.
Impacts, particularly in marine environments, can significantly affect Earth's geological and biological evolution. However, detailed knowledge of the marine impact cratering process is still limited. Among the 170 terrestrial craters, Mjølnir and its proximal ejecta deposits are unique: It is one of few marine impacts, and since the proximal ejecta always remained under water in calm conditions, it is most likely very well preserved. Today, the crater's central uplift is buried under ∼50 meters of postimpact sediments and 350 meters of water.