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Gamma-ray anomalies have been used to indicate the presence of certain types of economic ore deposits. Radioactivity levels indicative of economic mineral deposits would probably be tens of times larger than the gamma-ray counts for the anomalies at Sites 103, 104 and 105. No economic ore deposits are indicated by gamma-ray measurements made on Leg 11 cores. III. GRAIN SIZE Jurassic-Cretaceous Jurassic-Cretaceous Jurassic-Cretaceous Drill cuttings. Jurassic-Cretaceous Jurassic-Cretaceous Jurassic-Cretaceous Upper Jurrasic Upper Jurassic Upper Jurassic GZ = size term. Upper Jurassic Upper Jurassic Upper Jurassic Upper Jurassic Jurassic (?) Jurassic (?) Jurassic (?)-predominant lithology based on shored based grain-size analyses. CD = predominant lithology based on shipboard core descriptions (Site Reports, this volume). CO3 = percent carbonate from shore based analyses. Includes all carbonate present in the sediments, f-n = foraminifera-nannoplankton. NS = no sample. "Average value based on peak average drawn on strip chart record (background removed). See Figures 4 and 5 for discussion and illustration of peak average line. Described in Site Report (this volume) as clayey limestone. See text (this chapter) for lithology discussion.

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