Figure F4. Regional bathymetric map of the Hess Deep Rift showing key morphological features and locations of ODP Sites 894/895 and Expedition 345 proposed Sites HD-01B–HD-04B. Boxes indicate where smaller scale maps of the western end of the intrarift ridge and the southernmost slope of the intrarift ridge are shown in Figures F5 and F6. Regional multibeam bathymetry data were acquired using the hull-mounted Kongsberg Simrad EM120/SBP120 system (12 kHz). Newly acquired swath data were gridded at between 50 and 150 m depending on the density of data coverage, with the smallest grid spacing in the center of Hess Deep, and combined with existing swath data in this region available from the Marine Geoscience Data System (www.marine-geo.org). Existing data were from cruises aboard the R/V Thomas Washington in 1982 (principle investigator [PI]: P. Lonsdale), 1985 (PI: P. Lonsdale), and 1992 (PI: L. Dorman) and aboard the R/V Melville in 2000 (PI: D. Fornari) and 2002 (PI: E. Klein). Map prepared by D. Shillington and V. Ferrini.
Previous | Close | Next | Top of page