Data from these sources are abstracted and recorded on the 5" 

 X 8" data cards, or negative photostats are made of relevant tables, 

 figures, or pages of text and stapled or glued to the cards. Usually only 

 one sample is recorded on each card, front and rear; however, very 

 detailed analyses sometimes require several cards which are clipped 

 or stapled together. Where two or more samples are taken at a single 

 location by the same ship, they may be recorded on a single card 

 even if they are different types of samples (Figure 5). Occasionally, 

 when a very close sampling design is followed on a survey, several 

 samples are recorded on a single card, but only if they are located 

 within a single degree of latitude and longitude (Figures 2,3, and 4). 



Several representative examples of the types of data and forms in 

 w^hich bottom samples are recorded on data cards are shown in Figures 

 1 through 12. The U. S. Naval Oceanographic Office summarizes most 

 of its sediment data as shown in Figure 1. Only the results of engineer- 

 ing tests (Atterberg limits, unconfined compression strength, vane 

 shear strength, and consolidation rate), which are made on a few 

 samples, are reported on a different form. A photostatic reduction of 

 the summary sheet is made to mount it on the 5" x 8" data card. 



Figure 2 presents an example of a core analysis (Code 47) which 

 gives the representative median grain size and sorting coefficients; 

 however, the water content is the only sediment property for which 

 the vertical variation is given. In Figure 3 data from an Italian source 

 (Code 276) shows field classifications of eight shallow water samples 

 of the surface sediment which were obtained within the one-degree 

 quadrangle 44°-45°N, 12''-13°E. Such data are more reliable than 

 nautical chart notations only because the source is identified and a 

 scientist (Mario Picotti) has classified the sediment samples. A 

 third sample (Code 20, Murray and Chumley, 1924-1926) in Figure 4 

 classifies a pelagic sediment sample and reports its mineral composi- 

 tion and the relative proportions of various types of organic remains. 



In FigurelOa shallow water core sample obtained during ATLANTIS 

 Cruise 21 (Code 172) gives a field description of the core, the median 

 and mean grain size, the size sorting coefficient, and the percentage 

 distribution of grain sizes using the phi notation for three representa- 

 tive subsamples. A summary description of a deepwater core (Figurell) 

 is reported from a French source (Code 138). A qualitative classification 

 of a deepwater sample obtained by the ATLANTIS Cruise 151 is of 

 limited value because of the paucity of information and no indication 

 as to type of sample (Figure 12). 



