PLATE 10 

 Fig. A. — Station 17, canyon head, near axis, 350 fms. 

 Figs. B-C. — Station 18, outer shelf, west of canyon head, 70-75 fms. 

 Figs. D-F. — Station 22, canyon head, near axis, 395-405 fms. 



A, Muddy silt bottom with occasional small pebbles (arrows 1, 2) ; suggestion of 

 low amplitude ripple marks; crest orientation of 005°-185°, burrow, right of 

 compass vane. 

 B&C, Sandy silt, slightly shelly; patchy distribution of silt veneer produces mottled 

 effect. Depression (arrows) in upper right corner of B, caused by impact of 

 compass; reveals cohesive nature of sediment. Interference ripple marks (crest 

 orientations: 020°-200° and 165°-345; dominant current towards west), lumps 

 in lower left corner of B may be small pebbles or faecal casts; pelecypod shells 

 partially buried and concave up; fish near bottom in C. 

 D, Silty mud, granular nature of bottom probably due to faecal pellets. Two 



asteroid depressions ("lebensspuren") formed by unknown organism. 

 E&F, Silty mud (compass cloud reveals muddy nature). Note scour lineations 

 (arrow indicates probable current direction toward south) in E. Abundant small 

 tubes of polychaete worms (Hyalinoecia) trending generally parallel to scour 

 lineations. Note also steep-sided depression of uncertain origin in E. 



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