HILL: GEOLOGY OF JAMAICA. 87 



From Priestman's Eiver to Manchioneal this formation makes a Llutf 

 150 feet bigh, located slightly back of the shore line until within one 

 mile of Manchioneal, when it approaches the edge of the sea. In the 

 bluffs encountered just north of Manchioneal along the coast road are 

 exposures of the formation 100 feet or more thick. Careful search for 

 fossils in this bluff revealed only a few undetermined casts, — a few 

 moUusks, a single species of reef building coi-al, as determined by 

 Vaughan, many specimens of a Terebratula which Charles Schuchert 

 has kindly studied as elsewhere reported, and a single pteropod. 



The Manchioneal formation continues south of Manchioneal as far as 

 Priestman's River at the east end of the island, where our traverse left 

 the seacoast and turned inland via Bath, reaching it again at Bowden. 

 The beds may also be exposed along the intervening strip of coast 

 between Priestman's River and Bowden. 



Barrett has reported from various localities at the east end of the 

 island between Port Antonio and Morant Bay, at Old Harbor, Man- 

 chioneal, and capping the hill at Bowden, a formation to which he gave 

 the name of the Pteropod Marls.-' His lithologic and stratigraphic de- 

 scriptions of this formation are so meagre that it is difficult to identify 

 the beds to which he intended the name should be applied. Even why 

 it was called Pteropod Marl is not apparent, as only three species of 

 pteropods were reported from it. Others alleged that it was composed 

 largely of Foraminifera, tliirtetn species of which, as determined by 

 T. Rupert Jones, are enumerated on page 314 of the Jamaican Reports. 

 Our reconnoissance of the east end of the island w^as largely made to 

 study this formation, but we were unable to recognize any beds cor- 

 responding to it as a unit. We found marls with pteropods both at 

 Manchioneal and at Bowden, each of which localities was specifically 

 mentioned by Barrett, but inasmuch as these two places represent out- 

 crops of distinct formations, the same name can hardly be applied to 

 them, although there is but little doubt that they succeed each other 

 stratigraphicall3\ 



Marine Pliocene formations analogous to the Manchioneal beds of the 

 east are but sparsely represented in the western part of the island. 

 At only one locality have we seen anything analogous to it. From 

 eight to nine miles southwest of Montego Bay on the coast road at and 

 near Round Hill, there are extensive beds of yellow marl, resting upon 

 a foundation of the Montpelier white limestone, which occupy the 

 stratigraphic and topographic position of the Manchioneal beds of the 



^ Jamaican Reports, p. 82. 



