448 



LAUGHTON 



[chap. 18 



Fig. 15. 35° 07'N, 13° 04'W. Depth 2035 m. Ampere Bank. Area of picture 1^ by 2^ m. 

 (Photo by L.G.O.) 



Bank of well graded (1 cm diam.) but multicoloured shingle of unknown composi- 

 tion. In the centre right is a sponge. 



Fig. 16. 35 10.5'N, 15° 28'W. Depth 905 m. Seamount northeast of Madeira. Area of 

 picture 1| by 2i m. (Photo by L.G.O.) 



Bank of shingle bordering an area of Glohlgerina ooze. The sharpness of the bound- 

 ary and a detailed examination of the shingle suggest that the latter may be organic 

 and spreading laterally over the ooze. Note the pennatulid at top left. 



