clay size particles for the red clay were 5, 24, and 71. The globigerina 

 ooze was composed of 31% sand size particles, 227, silt size, and 477, 

 clay size. Carbonate carbon and organic carbon accounted for approxi- 

 mately 47 of the red clay and 67 of the globigerina ooze. 



Vane Shear Strength and Index Properties . The shear strength and 

 index properties are plotted in Figures 8 and 9 . Both the remolded 

 and undisturbed vane strengths increase with depth. The trip corer 

 strengths correlate quite well with the results of the gravity corer. 

 The index property plots suggest that the water content of a globigerina 

 ooze is greater than the water content of a red clay. The liquidity 

 index of the ooze, however, tends to be less than the red clay. No con- 

 clusive statements can be made about the effect of the two materials on 

 the Atterberg limits. 



Station G 



Geologic Considerations . Station G is located on the New Britain 

 Basin, one of two major basins in the Solomon Sea. Turbidity currents 

 at one time carried large quantities of terrigenous material to the 

 basin's floor; however, the turbidity currents are no longer active. 

 Consequently, pelagic sediments such as red clays and globigerina oozes 

 dominate the surface material (Fairbridge, 1966). Bottom samples taken 

 in adjacent areas by the Recorder Expedition (Krause, 1967) yielded 25 

 centimeters of buff ooze overlying 10 centimeters of blue volcanic clay. 

 The site has a water depth of approximately 2,450 fathoms. 



Sediment Identification . The gravity corer obtained 186 centimeters 

 of sample. The soil profile included 50 centimeters of red clay above 

 70 centimeters of mottled red clay and gray-green silty clay. The 

 remaining 66 centimeters of sample were composed of the gray-green silty 

 clay. The Unified Classification System defined the red clay and the 

 gray-green silty clay as inorganic silts of high compressibility (MH) . 

 The Trilinear System classified the red clay as a silty clay and the 

 gray-green silty clay as a sand-silt-clay. The median diameters of the 

 red and green clays were 0.0025 and 0.005 millimeter, respectively. 

 The red clay was composed of 87, sand size particles, 29% silt size, and 

 637« clay size, while gray-green clay consisted of 147, sand size particles, 

 367, silt size, and 507, clay size. Carbonate carbon and organic carbon 

 constituted less than 4.57, of both samples. 



Vane Shear Strength and Index Properties . The strength and index 

 properties are plotted in Figure 10. No unusual trends are detected in 

 the strength plots. The gray-green clay has significantly higher 

 strengths than the red clay. A strength determination on an 18-centimeter 

 trip corer sample tends to verify the strength determination made on an 

 upper interval of a gravity corer. 



26 



