Figure F4. Three-dimensional bathymetric map draped with aspect of slope grid (middle image). Color changes depict changes in slope and slope direction yielding seafloor fabric elements. The map is constructed by first constructing a slope grid of bathymetry and then extracting an aspect map of the slope grid. Color changes mark maximum and minimum in slope and changes in slope direction. Aspect of slope has higher sensitivity in delineating even subtle seafloor fabric when compared to bathymetric contouring. Linearity of the color changes marks the orientation of major and minor bathymetric features or seafloor fabric elements. Red-green color changes indicate morphologic fabric elements that are ridge parallel, whereas blue-yellow color changes indicate morphological elements that are transform (spreading direction) parallel. Note pronounced yellow-blue spreading direction–parallel fabric elements within the transform and along and directly south of the Atlantis Bank on the western part of the transverse ridge. The latter fabric elements may represent corrugations of a core complex along which the lower oceanic crust sampled in Holes 735B and 1105A were exposed. The spreading direction–parallel fabric on the transverse ridge is overprinted by ridge-parallel seafloor fabric elements (multibeam grid provided courtesy of H. Dick and M. Tivey).

Figure F4. Three-dimensional bathymetric map draped with aspect of slope grid (middle image). Color changes depict changes in slope and slope direction yielding seafloor fabric elements. The map is constructed by first constructing a slope grid of bathymetry and then extracting an aspect map of the slope grid. Color changes mark maximum and minimum in slope and changes in slope direction. Aspect of slope has higher sensitivity in delineating even subtle seafloor fabric when compared to bathymetric contouring. Linearity of the color changes marks the orientation of major and minor bathymetric features or seafloor fabric elements. Red-green color changes indicate morphologic fabric elements that are ridge parallel, whereas blue-yellow color changes indicate morphological elements that are transform (spreading direction) parallel. Note pronounced yellow-blue spreading direction–parallel fabric elements within the transform and along and directly south of the Atlantis Bank on the western part of the transverse ridge. The latter fabric elements may represent corrugations of a core complex along which the lower oceanic crust sampled in Holes 735B and 1105A were exposed. The spreading direction–parallel fabric on the transverse ridge is overprinted by ridge-parallel seafloor fabric elements (multibeam grid provided courtesy of H. Dick and M. Tivey).