74 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 



lands to the coast, the Montpelier beds are magnificently displayed in 

 the road cuttings. Here the road descends through a thousand feet of 

 the white limestone, the lower half of which consists of the Montpelier 

 beds. 



The hill country back of Port Maria is largely made up of the Mont- 

 pelier beds, which are also well exposed near Dover, where Globigerinse 

 chalks with flints make up the beds. 



At the bluffs from one to two miles east of Buff Bay, which are more 

 fully described under the head of the Bowden beds (see Figure 23 and 

 Phite XXVII.), the Montpelier flint beds are seen beneath the Buff" Bay 

 formation. They are here exposed at and just east of the tunnel. This 

 section shows gradation upward into chalks without flints, and reveals 

 clearly that the Montpelier beds are stratigraphically below the Bowden 

 Oligocene. Three miles east of St. Margaret Bay, at a high bluff, 



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<v 



Figure 23. Section of Bluff East of Buff Bay. a, Montpelier Beds, with 



Flints ; h, Bowden Marls. 



tliere is a good exposure of the Montpelier flint beds. The collections 

 of the chalky limestone in which these flints were embedded consist of 

 Olobigerinse. The beds here have a strong south dip. From the 

 locality above mentioned to near Port Antonio, the flint bearing beds 

 frequently outcrop in the bluff's and are capped by the Bowden beds. 



The high bluffs backing the bay about one mile west of Port Antonio 

 afford a good oxposure of beds w^hich apparently represent a phase of 

 the Cambridge beds grading up into the Montpelier. Here the bluff 

 is made up entirely of white limestones of varying texture and greatly 

 disturbed. The lowest rock exposed is very hard limestone, sub- 

 crystalline in texttire in some places, and in others showing thin lamellae 

 of blue-black clays suggestive of the Cambridge beds. From the lower 

 and harder limestones casts of several of the molluscan species of the 

 Cambridge beds were collected, including a gigantic Xerina\a and a 

 Lucina. These fossils, together with the impurities of clay shale, sug- 

 gest that this portion of tlie beds belongs to the Cambridge formation. 

 Just above the foregoing strata there is a soft pulverulent bed of gran- 

 ular texture which is composed entirely of Cambridge Miliolidre. The 



