HILL: GEOLOGY OF JAMAICA. 



73 



ceeded by thicker beds, both of which contain flints and large Orbi- 

 toides. The exposure is very near the base of the formation, the Kich- 

 mond beds outcropping at no great distance. Between Falmouth 

 (Trelawney) and St. Ann Bay (St. Ann Parish) the whole north front 

 of the back coast country is made up of these beds, as described on the 

 upland road from Runaway Bay to Falmouth via Brownstown. Xear 

 Landovary about five miles west of St. Ann Bay, the back coast bluff 

 consists of the basal portion of the Montpelier beds with flints in contact 



Figure 2L Montpelier Formation at St. Ann Bay. 



with the Richmond gravel, as shown in the accompanying Figure 21. At 

 St. Ann Bay, the base of the Montpelier beds is also seen in the bluffs. 

 The rocks at Landovary have a strong south dip. In St. Mary Parish 

 the road from Runaway Bay to the summit of the hills of the back 

 coast country (altitude 1,450 ft.) en route to *Brownstown, passes over 

 at least 1,500 feet of white limestone, the lower 500 feet of which are 



Figure 22. Section at Landovary. a, Richmond Beds ; h, Montpelier Forma- 

 tion ; c, Coast Plain ; d, Elevated Reef, Sea Level. 



composed of the Montpelier beds with flints, grading upward into the 

 Moneague beds. From Retreat (St. Mary) to Falmouth in Trelawney, 

 the Montpelier beds are occasionally well exposed along the upland 

 interior road, especially in the bordering slopes of Hampshire Valley, 

 notably near the Blanksford and Highgate estates. From the summit 

 of the divide between the Hampshire Valley and the sea, 920 feet of 

 thfe flint bearing beds are exposed between that point and Falmouth. 

 On the highway from Moneague to St. Ann, in going from the high- 



