EXPLANATION OF DATA PAGES 

 SEDIMENT ANALYSIS SHEETS 



Results of bottom sediment sample analysis performed by the U.S. 

 Naval Qceanographic Off ice are recorded on the sediment analysis sheets. 

 Almost all bottom samples are analyzed weeks after the collection of 

 the samples 3 therefore, various procedures normally carried out during 

 a routine sediment analysis are not attempted. Determinations such 

 as: wet density, water content, porosity, etc., are not possible after 

 the samples have lost their "in situ" moisture; therefore, all values 

 left blank on the analysis sheets indicate these values could not be 

 accurately determined. 



The following is a description of the terms employed on the 

 sediment analysis sheets PRNC-NHO-1560 (Rev. 1-58): 



1. Sample Number . A consecutive number, commencing with 1, 

 applied to each bottom grab sample or core taken successively through- 

 out the cruise. 



2. Latitude. Expressed in degrees, minutes, and seconds. 



3. Longitude . Expressed in degrees, minutes, and seconds. 

 k. Date . Day (GMT J, month, and year. 



$. S ampler Type . Identified by name of device employed. 



6. Water Depth (fm.) . The uncorrected sonic sounding recorded 

 in fathoms. 



7. Core Length (in.) . Recorded in inches as observed in the 

 laboratory. This information is not given when a grab sampler was 

 employed. 



$• Core Penetration (in .) . Recorded in inches as observed in 

 the field"! This information is not given when a grab sampler was 

 employed. 



9. Laboratory Number . A reference number assigned to a fraction 

 of a sample retained by the Laboratory. 



10. Subsample Depth in Core (in.) . Interval of the subsample as 

 measured from the top of the core. Not applicable for a grab sample. 



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