OCEAN BOTTOM— PIGGOT 



209 



The value of these samples, over previous ones, is that the mate- 

 rial is available for study in the undisturbed sequence existing in 

 the bottom, and consequently a record of succeeding events may be 

 obtained from it. Particular strata may be traced over wide areas, 

 and a knowledge of the succession of events in terms of time and 

 extent may be obtained. 



S^« 



WATER EXIT PORT 



SAMPLE 

 TUBE 



BIT 

 ASSEMBLY 



Figure 1. — Diagram of core sounding apparatus showing parts drawn to same scale. 

 DETAILS OF THE APPARATUS 



The apparatus consists of five principal parts : a weight or "gun", 

 a cartridge, a firing mechanism, a water-exit port, and a bit. These 

 are shown diagrammatically in figure 1, and the assembled appa- 

 ratus, with a 10-foot bit, in plate 1. 



