Explanation of Data 



1. Sample Nuiiber - a consecutive niimber, commencing with 1, applied 

 to each bottom grab sample or core taken successively throughout 

 the cruise, 



2. Latitude - expressed in degrees, minutes, and seconds^ 



3. Lon.Gjitude - expressed in degrees, minutes, and seconds. 



4. Date - day (GMT), month, and year. 



5. Sampler 'Type - identified by name of device employed, 



6. Water Depth (fm.) - the uncorrected sonic sounding recorded to 

 the nearest whole fathom, 



7. Core Length (in.) - recorded to the nearest whole inch as observed 

 in the laboratory. This information is not given when a grab 

 sampler is employed. 



8. Core Penetration (in.) - recorded to the nearest whole inch as 

 observed in the field. This information is not given when a grab 

 sampler is employed. 



9. Subsample Depth in Core (in.) - depth to the nearest whole inch 

 of the mean depth of the subsample. This information was not 

 entered when a surface grab sample or a short core sample was 

 obtained. The analysis of the subsample is assumed as repre- 

 sentative of the entire core length. 



10. Color - based on the Geological Society of America Rock-Color chart, 



11. Sphericity (avg.) - a measure of the approach of the grain to the 

 form of a sphere and expressed as one of the following: high, 

 medium high, mediura, meditim low, or low. 



12. Roundness (avg.) - a function of the sharpness of the grain edges 

 and recorded as one of the following: very angular, angular, 

 subangular, subrounded, rounded, or v/ell rounded, 



13. Surface Texture (avg.) - a description of the physical appearance 

 of the grain siirface recorded as dull or polished and one of the 

 following: smooth, striated, faceted, frosted, pitted, or etched. 



14. Total Subsample Dry Weight (gm.) - dry weight to the nearest tenth 

 of a gram. 



115 



