98 



bulletin: museum of comparative zoology. 



This marl, in turn, is tipped at the sea by the lower Soboruco. A 

 general section of the Barbican and lower rocks at this point is as 

 follows.^ 



5. Coast Soboruco, made up of coral heads largely Mean- 

 drina, occurring at and four feet above sea level . . 

 (Unconformity) . 

 4. Coarse marl with shells and corals, irregularly indu- 

 rated and cemented. Forms base of bluff . . . 

 (Unconformity.) 

 3. Barbican formation. Soboruco of coral heads, firmly 

 cemented, resting unconformably upon 1 . . . . 

 2. Marly bed with many broken branch corals (reef debris) 

 which generally underlies the above in this region . 

 (Unconformity.) 

 1. Eichmond beds, forming the fundamental rocks "sipon 

 which all of the above are deposited. Only partially 

 exposed. 



Feet. 



--25'* 



FiGUEJS 36. Tlic Barbican Reef at Barbican. 



a. Coast Marl. 



b. Barbican Reef. 



c. Richmond Beds. 



From !Nrilc Post 19 to Mile Post 21^ the coast topography shows 

 only two of the benches, the immediate coast plain and the Barbican or 

 twenty-fivo foot terrace, which projects out from the back coast hills. 

 At twenty-one and a half miles from Port Antonio the seventy foot or 

 Hopewell reef terrace again appears as a prominent feature in the coast 

 topography. 



Lucea Harbor has the shape of an elongated mule shoe and is a bight 

 cut out of the land mass, here principally made up of the Richmond 

 sliales. The points of the harbor adjacent to the sea are tipped with 

 the low coast Soboruco. 



^ In litliologic characters tliis aprces in the main with that given of the locality 

 by Brown on page 248 of the Jamaican Reports. 



