By Henning Dypvik, Mark J. Burchell, Philippe Claeys
Despite their international value, little is understood concerning the few present examples of affects into marine environments and icy goals. they're one of the least understood and studied components of impression crater geology. The icy affects also are of significant significance in figuring out the advancements of the outer planets and their satellites reminiscent of Mars or Europa. moreover, the influence mechanisms, crater formation and cave in, soften construction and the ejecta distribution are scarcely recognized for effect on goals except the "classical" strong silicates of the continental crust. The response of water and ice to affects basically merits a extra thorough learn. the certainty of influence results and outcomes relating to aqueous hits, gentle sediments and icy ambitions has no longer been completely explored and contains the focus of this e-book.
A variety of papers within the box of hypervelocity affects on ice are integrated. those hide a overview of accessible literature within the box of laboratory reviews of such affects, huge effect buildings on Titan, predicting influence cratering on a comet nucleus, and a unique document at the survival of micro organism fired at hypervelocity into icy surfaces. This latter paper is worried with astrobiology and particularly Panspermia (natural migration of existence via space).
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In: Buffetaut E, Koeberl C (eds) Geological and Biological Effects of Impact Events. Springer, Berlin, pp 66-81 Smelror M, Kelly SRA, Dypvik H, Mørk A, Nagy J, Tsikalas F (2001b) Mjølnir (Barents Sea) meteorite impact offers a Volgian-Ryazanian boundary marker. Newsletter on Stratigraphy 38: 129-140 Smelror M, Mørk A, Mørk MBE, Weiss HM, Løseth H (2001c) Middle Jurassic-Lower Cretaceous transgressive-regressive sequences and facies distribution off northern Nordland and Troms, Norway. In: Martinsen OJ, Dreyer T (eds) Sedimentary environments offshore Norway - palaeozoic to recent: proceedings of the Norwegian Petroleum Society Conference, 3-5 May 1999, Bergen, Norway.
Icarus 145: 64-78 Ward SN, Asphaug E (2002) Impact tsunami - Eltanin. Deep - Sea Research II 49: 10731080 Warme JE, Kuehner HC (1998) Anatomy of an anomaly; the Devonian catastrophic Alamo impact breccia of southern Nevada. International Geological Review 40: 189 - 216 Warme JE, Sandberg CA (1996) Alamo megabreccia; a record of a Late Devonian impact in southern Nevada. Geological Society of America Today 6(1): 1 – 7 Whipple FL (1950) A comet model. I. The acceleration of Comet Encke. Astrophysical Journal 111: 375 – 394 Whipple FL (1951) A Comet Model.
This is also typical for the faunas found in the Wilhelmøya Subgroup (Knorringfjellet Formation) on Svalbard, with which the recovered assemblages show close similarities. A few samples from the Stø Formation (equivalent to the Upper Wilhelmøya Subgroup) off Troms were analyzed for foraminifera, and they also contain low diversity faunas with small specimens of Ammodiscus and Trochammina similar to those found in the impactaffected interval in core 7329/03-U-01. 30 m) overlying the disturbed strata contain rich and unaffected Ryazanian faunas dominated by Evolutinella schleiferi, Evolutinella vallata, Gaudryina rostellata, Recurvoides obskiensis, Trochammina cf.
Cratering in Marine Environments and on Ice by Henning Dypvik, Mark J. Burchell, Philippe Claeys