SECT. 2] 



MICKOTOPOGRAPHY 



441 



Fig. 4. 42° 40'N, 11° 35'W. Depth 666 m. Top of Galicia Bank. Area of picture U by 21 m. 

 (Photo by N.I.O.) 



Bottom of hmestone with marked Hnear fractures, strewn with dark erratic cobbles 

 and bouklers. The prominent fauna are commatuhd crinoids with a pennatuKd in the 

 centre. 



Fig. 5. 0° lO'S, 18" 21'W. Depth 7500 m. Romanche Trench. Area of picture 1 by 1 m. 

 (Photo by Edgerton for N.G.S.) 



Fractured rock-face showing coarse conglomerate dike structure of rock. The lack 

 of fine sediments suggests strong currents. Four small Crustacea are swimming above 

 the bottom. The dark patches are mud clots on the camera window. 



