Kawabata, H.; Sato, K.; Tatsumi, Y.; Scholl, D. W.; Takahashi, Kozo; Ravelo, Christina; Alvarez Zarikian, Carlos; Guerin, Gilles; Liu, Tanzhuo; Aiello, Ivano; Asahi, Hirofumi; Bartoli, Gretta; Caissie, Beth; Chen Muhong; Colmenero-Hidalgo, Elena; Cook, Mea; Dadd, Kelsie; Huh, Youngsook; Husum, Katrine; Ijiri, Akira; Ikehara, Minoru; Kender, Sev; Lund, Steve; Maerz, Christian; Mix, Alan; Ojha, Maheswar; Okada, Makoto; Okazaki, Yusuke; Onodera, Jonaotaro; Pierre, Catherine; Radi, Taoufik; Risgaard-Petersen, Nils; Sakamoto, Tatsuhiko; Schrum, Heather; Stroynowski, Zuzanna N.; Walsh, Emily A.; Wehrmann, Laura (2009): Description of basement volcanic sequences in holes U1342A and U1342D on Bowers Ridge in the Bering Sea. IODP Management International, Washington, DC, United States, In: Takahashi, Kozo, Ravelo, Chirstina, Alvarez Zarikian, Carlos, Guerin, Gilles, Liu, Tanzhuo, Aiello, Ivano, Asahi, Hirofumi, Bartoli, Gretta, Caissie, Beth, Chen Muhong, Colmenero-Hidalgo, Elena, Cook, Mea, Dadd, Kelsie, Huh, Youngsook, Husum, Katrine, Ijiri, Akira, Ikehara, Minoru, Kender, Sev, Lund, Steve, Maerz, Chirstian, Mix, Alan, Ojha, Maheswar, Okada, Makoto, Okazaki, Yusuke, Onodera, Jonaotaro, Pierre, Catherine, Radi, Taoufik, Risgaard-Petersen, Nils, Sakamoto, Tatsuhiko, Scholl, David, Schrum, Heather, Stroynowski, Zuzanna N., Walsh, Emily A., Wehrmann, Laura, Proceedings of the Integrated Ocean Drilling Program; Bering Sea paleoceanography; Expedition 323 of the riserless drilling platform; Victoria, British Columbia (Canada), to Yokohama, Japan; 5 July-4 September 2009, 323, georefid:2011-032777

Abstract:
At Ulm Plateau, near the eastern end of the crestal area of Bowers Ridge, basement of lithified volcaniclastic sediment ( approximately 42 m) was recovered at Integrated Ocean Drilling Program (IODP) Site U1342 beneath a thin cover ( approximately 49 m) of surface sediment. Recovery of basement rock provided an unprecedented opportunity to address the origin and evolution of this enigmatic appendage of the Aleutian arc massif. Contrasting hypotheses have been proposed for the formation of the arc massif of Bowers Ridge, either in the Cretaceous North Pacific Ocean exotic to the Bering Sea or within the Bering Sea during the Eocene formation of the Aleutian arc. The volcanic sequence recovered from Site U1342 was divided into six major lithologic units: Unit I, vesiculated andesitic lava flow; Unit II, interbedded volcanic sandstone and polymict volcanic conglomerate; Unit III, monomict volcanic conglomerate; Unit IV, interbedded volcanic sandstone and polymict volcanic conglomerate; Unit V, monomict volcanic conglomerate; and Unit VI, polymict volcanic conglomerate. Units III and IV represent hydroclastic volcaniclastic deposits, whereas Units II, IV, and VI are epiclastic volcaniclastic strata.
Coverage:
West: 176.5504 East: 176.5504 North: 54.4942 South: 54.4942
Data access:
Provider: SEDIS Publication Catalogue
Data set link: http://sedis.iodp.org/pub-catalogue/index.php?id=10.2204/iodp.proc.323.110.2011 (c.f. for more detailed metadata)
Data download: application/pdf
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