A sediment trap intercomparison study in the Santa Barbara Basin

868

D. Submarine Geology and Geophysics

Accumulation rates and chemical compositions of material collected in particle interceptor traps (PIT's) compared favorably with the naturallycalibrated laminated and preserved bottom sediments of 3 California basins; the PIT design appears to collect a representative sample and provide a good estimate of particle flux. Center for Coastal Mar. Stud., Univ. of Calif.. Santa Cruz, Calif. 95064. USA. (dme) Dymond, Jack et al., 1981. A ~ parlson study in the ~ ~ planet, Sci. Letts, 53(3):409-418.

81:6535 ~ inttt~m~. Earth

Determinations of sediment flux and composition were similar for 4 traps of radically different design: paired cones, folding box, cylinder, closing box. These are encouraging results for directly measuring oceanic particulate flux. Oregon State Univ., Corvallis, Oreg. 97331, USA. (dme) 81:6~6 Flinn, E.A., 1981. Aplflleatinn of ~ tedtmflogy to ~ ¢ s . Science, 213(4503):89-96. Classical geodetic methods are insufficiently accurate to measure tectonic plate movement and deformation, in addition to being impractical and prohibitively expensive at the level of detail required. Long-baseline microwave int, rferometry and laser ranging to satellites are two space-based techniques which show promise of attaining movement measurement accuracies within 2-3 cm in the very near future. Coordinated national and international research programs are underway to study polar motion, plate movements, Earth rotation, crustal deformation, etc. NASA, Geodynamics Program, Washington, D.C. 20546, USA. (slr) 81:6537 Kalinin, V.V., A.V. Kalinin and V.E. Fadeev, 1981.

The ~ of mlaS tie a h e m ~ of bottom dqmaits on the dldf for mhtag ~ . Dokl. Akad. Nauk SSSR, 257(5):1096-1098. (In Russian.)

OLR ( 1981 ) 28 ( 12J

underlying bottom. Dept. of Oceanography WB-10, Univ. of Washington, Seattte, Wash. 98195, USA. 81:6539 Safar, M,H. (commen0 and J,E. Sinclair (reply), 1981. [Dtsel~on of] 'Interaction effects in nmxin¢ ~ source arrays.' Geophys. Prospect, 29(3):470-477.

81:6540 Zverev, S.M., G,N. Akimov, V.S. Novikov, A.N. Fursov and V.M, Shablitskii, 1978. Apparatus for deep seismic , ~ ~ for exmtntn~ earth tremors on land and:at sea. Seism. Instrums (a translation of Seismicheskie Pribory), I1:6062.

!)40. Area studies, surveys, bathymetry 81:6541 Hanada, Masaaki and Masaaki Igarashi, 1981~ M ~ of Suraga Bay IJapanl. J. Fac. mar. Sci. Technol., Tokai Univ,, 14:123-132. (In Japanese, English abstract.) 81:6542 Hashimi, N.H., R.M. Kidwai and R.R. Nair, 1981. Comparative study of the ~ y &sediments of the western & eastern continental shelves around Cape Comorin [ ~ l~i. Indian J. mar. Sci~ 10(1):45-50, National Inst, of Oceanography, Dona Paula, Goa 403 004, India. 81:6543 Vanney, J.R., R.K.H. Falconer and G.L. Johnson, 1981. Geomorphoiogy of the Ross Sea and adjacent oceanic provinces. Mar. Geol. 41(I/2): 73-102.

81:(~.~ Lorenzen, C.J., F.R. Shaman and J.T. Bennett, 1981. In,site ~ of a sodimwt trap. L/mnol. Oeeanogr, 26(3):580-585.

Tectonism, volcanism, glaciation, and sedimentation have shaped the shelf morphology of the Ross Sea. Seafloor provinces are described geologically, geophysically, hydro-glaciologicatly and sedimentologically. Some plate reconstruction models are discussed. Includes bottom photos and 5 pages of references. Inst. de Geographic, Univ. de ParisSorbonne, 191 rue Saint,Jacques, (F) 75005, Paris, France. (dme)

A relatively small self-contained sediment trap with a timed closing system was deployed in Dabob Bay, Washington, for 1 yr. An in-situ calibration was obtained by comparin$ the capture and retention of unsupported 2z°Pb by the traps with the steady state accumulation rate of unsupported 21°Pb in the

Yen, T.P., 1980. A ~ ~ n o f the on-rand and eCr~¢e Irqltem! Tai' wan. Proc. geol. Soc. China, Taiwan, 23:37-45. Dept. of Geophysics, National Central Univ, Taiwan.