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Synthesis: stratigraphy and age control for IODP Sites U1394, U1395, and U1396 offshore Montserrat in the Lesser Antilles1

M.F. Coussens,2 D. Wall-Palmer,3 P.J. Talling,3 S.F.L Watt, 4 S.J. Hatter,2 M. Cassidy,5 M. Clare,2 M. Jutzeler,3 R. Hatfield, 3 M. McCanta, 3 K.S. Kataoka,3 D. Endo,3 M.R. Palmer, 3 A. Stinton, 3 A. Fujinawa, 3 G. Boudon,3 A. Le Friant,3 O. Ishizuka,3 T. Gernon, 2 T. Adachi, 3 M. Aljahdali,3 C. Breitkreuz,3 A.J. Frass,3 M.J.Hornbach, 3 E. Lebas, 6 S. Lafuerza,3 F. Maeno,3 M. Manga,3 M. Martinez-Colon, 3 J. McManus, 3 S. Morgan,3 T. Saito,3 A. Slagle, 3 K.S.V. Subramanyam, 3 Y. Tamura, 3 J. Trofimovs,7 B. Villemant,3 F. Wang,3 and the Expedition 340 scientists3


This data report focuses on Holes U1394B, U1395B, and U1396C located offshore Montserrat. These holes were drilled during Integrated Ocean Drilling Program Expedition 340 and contain deposits associated with the growth and decay of the volcanic island of Montserrat. Hole U1394B dates to ~353 ka and is composed of 17 bioclastic turbidites, 24 mixed turbidites, 55 volcaniclastic turbidites, and 32 tephra fall layers within a background stratigraphy of hemipelagic marine mud. Hole U1395B dates to older than 1 Ma and contains 18 bioclastic turbidites, 27 mixed turbidites, 43 volcaniclastic turbidites, and 52 tephra fall layers. The uppermost 7 m of Hole U1396C covers ~1 My of stratigraphy and contains 1 bioclastic turbidite, 1 mixed turbidite, 9 volcaniclastic turbidites, and 13 tephra fall layers. Tephra fall and some volcaniclastic deposits are associated with episodes of island building, whereas bioclastic turbidites, mixed turbidites, and some volcaniclastic turbidites are associated with large landslide events from Montserrat.

1 Coussens, M.F., Wall-Palmer, D., Talling, P.J., Watt, S.F.L, Hatter, S.J., Cassidy, M., Clare, M., Jutzeler, M., Hatfield, R., McCanta, M., Kataoka, K.S., Endo, D., Palmer, M.R., Stinton, A., Fujinawa, A., Boudon, G., Le Friant, A., Ishizuka, O., Gernon, T., Adachi, T., Aljahdali, M., Breitkreuz, C., Frass, A.J., Hornbach, M.J., Lebas, E., Lafuerza, S., Maeno, F., Manga, M., Martinez-Colon, M., McManus, J., Morgan, S., Saito, T., Slagle, A., Subramanyam, K.S.V., Tamura, Y., Trofimovs, J., Villemant, B., Wang, F., and the Expedition 340 Scientists, 2016. Synthesis: stratigraphy and age control for IODP Sites U1394, U1395, and U1396 offshore Montserrat in the Lesser Antilles. In Le Friant, A., Ishizuka, O., Stroncik, N.A., and the Expedition 340 Scientists, Proc. IODP, 340: Tokyo (Integrated Ocean Drilling Program Management International, Inc.). doi:10.2204/iodp.proc.340.204.2016

2 School of Ocean and Earth Science, University of Southampton, Southampton SO14 3ZH, United Kingdom. Correspondence author:

3 See Expedition 340 Scientists’ addresses.

4 School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham B15 2TT, United Kingdom.

5 Institute of Geosciences, Johannes Gutenberg, University Mainz, 55128 Mainz, Germany.

6 Institut de Physique du Globe de Paris, CNRS UMR 7154, 75238 Paris Cedex 05, France.

7 Queensland University of Technology, GPO Box 2434, Brisbane QLD 4001, Australia.

Initial receipt: 16 April 2015
Acceptance: 29 September 2015
Publication: 8 January 2016
MS 340-204