Dive No. 



Latitude (N) 



Longitude (W) 



Depth (ft) 



Fresh Creek 1 



24°42.1' 



77°44.6' 



11 



Fresh Creek 2 



24°43.0« 



77''45.3' 



12 



Big Wood Cay 3 



24°20.0' 



77°41.25' 



16 



Go 1 ding Cay 4 



24°13.2' 



77°36.0' 



30 



A sketch showing the major features and their depth of occurrence 

 is presented in Plate 24 which is a composite representation of the 

 wall as derived from data collected on all dives. Regionally, little 

 difference is present in the rim characteristics at all four locations, 

 The spur and groove configuration which is distinct and extends to 

 the break-in-slope at dive location 1 is less distinct at dive 2 and 

 not present at dives 3 and 4. Also present at dive 1 is a well- 

 defined notch in the wall which commences at 170 feet and ends 

 abruptly at 200 feet. This notch is continuous for more than 100 

 yards on both sides of the survey line and penetrates in excess of 

 20 feet into the wall. On the remaining dives no well-defined notch 

 was observed. The similarity of this notch to the intertidal notches 

 observable at the base of present day Bahamian cays and islands is 

 striking, (see Plate 19C of High Point Cay) and strongly suggests 

 formation at a previous lower sea level. 



Typically, the rim escarpment between the break-in-slope and 400 

 to 450 foot depths consists of a hard rock wall texturally rough 

 and thoroughly sculptured by caves, small terraces, and notches 

 ranging from a few feet to 20 and 30 feet magnitude and covered 

 with a thin veneer of sand in the crevices and on the terraces 

 (Plate 25 A§B) . Between 400 and 450 feet in depth these features 

 gradually diminish and, while not completely absent, give way to a 

 wall of smoother appearance, though still texturally rough. This 

 configuration continues to 600 feet and at least 20 to 30 feet 

 deeper. Visability at the 600 foot depth was between 20 and 30 

 feet with ambient light. Occasional large blocks of rock can 

 be observed at this depth which have broken off from above and 

 slid down the escarpment. Although the wall still appears vertical 

 at the 600 foot level an increase in the coverage and thickness 

 of the sand veneer suggests a decrease in the slope gradient. 



At the 350 foot level minor undulations trending parallel 

 to the wall are apparent. These undulations are no more than 



25 



