By Henning Dypvik, Filippos Tsikalas, Morten Smelror
The Mjølnir effect constitution was once well-known in 1993 and integrated within the Earth effect Database in 1996, in keeping with the discoveries of unequivocal meteorite influence symptoms comparable to surprised quartz, Ir-enrichments, attainable glass remnants, fragments of nickel-rich iron oxides, as well as the convincing advanced crater form of the constitution. This booklet offers the geological and geophysical heritage of the Barents Sea area besides the invention of the Mjølnir influence crater. We position the Mjølnir occasion into the geological framework of the zone and current elaborative numerical types of its formation and linked tsunami iteration. The ebook represents an replace and synthesis in addition to the whole compilation of the Mjølnir crater experiences.
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Additional info for The Mjølnir Impact Event and its Consequences: Geology and Geophysics of a Late Jurassic/Early Cretaceous Marine Impact Event
Sample text
1 Introduction 17 Fig. 12 Map showing the NE-trending ejecta distribution of the Mjølnir impact; (a) display the areal distribution of ejecta from the impactor and in (b) the compareable distribution (hatched) in the paleogeographic reconstruction is shown (Modified from Shuvalov and Dypvik 2004) movement of the central peak during crater evolution (Fig. 12). The recent direct involvement of structural geologist Roy H. Gabrielsen has demonstrated how the different mechanical phases in the crater development in combination with such numerical information can explain, in this case, some of the mechanisms in the crater-fill processes.
1999) 29 30 H. Dypvik et al. stable platform depositional conditions, dominated by fine-grained sedimentation, shales, silt-, and sandstones. The Triassic Sassendalen Group (Fig. 4) (Mørk et al. , Vikinghøgda and Botneheia formations). The succeeding Kapp Toscana Group (Mørk et al. 1982, 1999) displays a shift in sediment source areas from W and SW to SE. Extensive deltas filled the basin from southeast, Tschermakfjellet Formation representing the base with prodeltaic shales. This unit is overlain by De Geerdalen Formation with extensive deltas transporting sediment from mainland Norway and from the Urals filling most of the Barents Sea and Svalbard with deltaic to shallow shelf sediments (Mørk et al.
No 23 H. Dypvik et al. 1007/978-3-540-88260-2_2, C Springer-Verlag Berlin Heidelberg 2010 24 H. Dypvik et al. Lomonosov Ridge Fig. 1 Map of the Arctic, showing the location of the Mjølnir impact (star) between Svalbard and the mainland Norway. Modified from Jakobsson et al. (2003) Hovgård Ridge microcontinent (Myhre et al. 1982) and, possibly, the Greenland Ridge (Tsikalas et al. 2002b; Døssing et al. 2008). 2 Mesozoic Stratigraphy and Depositional Environments of the Arctic The Barents Shelf consists of several kilometers thick Paleozoic to Cenozoic sedimentary successions.
