243.8- 



GEOPHONES- 



SET IN ICE 



HORIZONTAL-TRANSVERSE 

 ■^ TO WAVE FRONT 

 » HORIZONTAL-LONGITUDINAL 



TO WAVE FRONT 



, VERTICAL-TRANSVERSE 



TO WAVE FRONT 



SNOW COVER (APPROX. 16.5 CM THICK) 



SHOT BLAST STATION 



457.2 METERS 



SHOT BLAST STATION' 



457.2 METERS 



AREA WHERE ONE ICE SHEET 

 HAS BEEN PUSHED UNDER 

 ANOTHER ICE SHEET 



(1) (-t) (7) 



I 





N, 



























\ 







ICE 



' 









































WATER 





Figure 3. Equipment layout on ice sheet (1955). 



0.80 0.85 0.90 0.95 1.00 



DENSITY (GMS/CM") 



Figure 4. Density profile of sea ice sheet, 

 site No. 1 (1955). 



