Figure F167. Digital core images (Core 210-1276A-68R) and associated natural gamma ray (NGR) values and x-direction velocity. Major sand-rich turbidites (red dots) are characterized by low NGR values, whereas clay-rich units (green squares and diamonds) correlate with high NGR values. The shape of the NGR response appears to be a function of grain size distribution within the upper part of the turbidite but not the base. In contrast, velocity probably is affected by both grain size and carbonate cementation. Lithologic symbols are defined in Figure F160, .

Figure F167. Digital core images (Core 210-1276A-68R) and associated natural gamma ray (NGR) values and x-direction velocity. Major sand-rich turbidites (red dots) are characterized by low NGR values, whereas clay-rich units (green squares and diamonds) correlate with high NGR values. The shape of the NGR response appears to be a function of grain size distribution within the upper part of the turbidite but not the base. In contrast, velocity probably is affected by both grain size and carbonate cementation. Lithologic symbols are defined in Figure F160.