TABLE 7. PHYSICAL PROPERTIES OF 1961 MOHOLE SAMPLES 



Sample 

 No. (1) 



Depth 



in Hole 



(m) 



Median 



Grain Diam. 



(mm) 



Sediment 

 Type 



Sp. Gr. 



Solids (21 



(g/cc) 



Wet 



Density (3) 



(g/cc) 



Over- 

 burden 

 Press. (4) 





Lab. 



]n Situ 



(kg/cm 2 ) 



GGC-3 



0.6 



0.003 



Silty clay 



-- 



1.51 



1.51 



-- 



EM8-1 



29.0 



0.004 



Clayey silt 



2.73 



1.52 



1.55 



1.4 



EM8-9 



77.7 



0.004 



Silty clay 



2.61 



1.46 



1.51 



3.8 



EM8-10 



86.4 



0.003 



Silty clay 



2.55 



1.33 



1.36 



4.1 



EM8-11 



96.0 



0.002 



Silty clay 



2.51 



1.39 



1.40 



4.4 



EM8-12 



105.6 



0.002 



Silty clay 



2.60 



1.50 



1.55 



4.9 



EM8-13 



114.5 



-- 



-- 



-- 



-- 



-- 



-- 



EM8-14 



125.0 



0.003 



Silty clay 



2.48 



1.41 



1.43 



5.7 



EM8-15 



136.3 



0.002 



Silty clay 



2.54 



1.45 



1.46 



6.2 



NOTES: 



(1) GGC-3 data an average of two samples from gravity core at Guadalupe Site. 



(2) Pycnometer; drying at 105°C (avg. of 3). 



(3) Wt./volume relationship on wet sample 1" high, 2" to 2M>" in diameter; this sample, used in 

 consolidation test, was basis for determination of porosity, void ratio and wet density; "in situ" 

 density from consolidation tests. 9 



(4) Computed from "in situ" densities derived from consolidation tests. 



Laboratory Measurements 



Sound speed was measured in the laboratory on eight 

 samples from Hole No. 3 (EM-8). The shallowest sample 

 was at 29 meters below the sea floor and the deepest from 

 136 meters; in addition, sound speed was measured in two 

 samples from a gravity core of the surficial red clay. 

 These sound-speed measurements are listed in table 8. 

 All of the samples were 100 percent saturated at the time 

 of testing. 



Four of the measurements were made using the 

 resonant chamber technique. 33 * 34 These measurements 

 were made by Shumway in April 1961, and have not been 

 previously published; the other six were made by the writer 

 using a pulse technique. All measurements were at one 

 atmosphere of pressure, and the temperature of the sedi- 

 ment at the time of measurement was carefully taken. 



28 



