1 foot from crest to trough and 6 feet across and are present beyond 

 the 600 foot depth (Plate 25C) . It is tempting to consider these 

 as the commencement of the gullies described by Athearn (1963) which 

 are present in the slopes below 100 fathoms and which reach a 

 magnitude of 600 feet in height and 1 mile wide. 



Direct measurement of the wall's slope gradient was not possible 

 from the submersible. When the submersible proceeded horizontally 

 at a distance of 4 or 5 feet from the wall, above the 400 foot 

 level, the course lead frequently into a cave or under an over- 

 hang. If the submersible was held a few feet from the wall the 

 view through the bottom viewing port showed nothing but water 

 directly below. Although this is a very rough measurement at 

 best, some definitive measurement was provided at dive site 3 

 off Middle Bight where several underwater cables leading from 

 shallow to deep (> 100 fms) water were present. From the top 

 of the rim escarpment to 600 feet the cables were 30 to 60 feet 

 away from the wall and never were observed to lay against the 

 wall (Plate 25). Since the cable length is sufficient to allow 

 the cable to lay on the bottom, this arrangement attests to the 

 steep slopes present in the upper 100 fathoms. 



Marine organisms such as algae and coral are present in abundance 

 to 200 feet and decrease decidedly below this depth. A specimen of 

 the reef coral Agarcia sp, was observed at 340 feet while gorgonians 

 and sponges were observed to 540 feet. Below 500 feet the wall is 

 essentially devoid of sedentary organisms visable to the naked eye. 



A representative sequence of photographs showing the rim escarp- 

 ment off dive site 4 (Golding Cay) is shown in Plates 26 and 27. 



SUMMARY AND CONCLUSIONS 



A graphic presentation of the major shoreline, lagoon, reef, and 

 outer (seaward) platform features of the sites studied is presented 

 in Plate 28. Although a detailed survey of the lagoon off Fresh 

 Creek is not presented, it is almost identical to the survey off 

 Salvador Point. Salient characteristics of the areas studied are 

 as follows: 



26 



