﻿A r . S. Shale?' — Geology of Cobscook Bay District, Me. 53 



locality was visited, very difficult. The rock is a very dense, 

 much jointed, siliceous limestone ;' the fossils are less distorted 

 than any others yet found in this basin. They appear on the 

 fracture faces of the rock with great clearness of outline and 

 are extremely abundant. From about five hundred pounds of 

 material selected from the upper ten feet of this section, careful 

 dissection with hammer and chisel developed the fifty or more 

 species from which the position of the group has been prelim- 

 inarily determined. It is probable from the results obtained 

 that at least one hundred species may be obtained from this 

 point. The next most important locality which is as a horizon 

 to be separated from the Orange Bay section is that exposed in 

 Denbo or Leighton's Bay, about two miles to the northwest 

 of Denbo Point. 



This locality exhibits at least two hundred feet of shales and 

 impure limestones. These beds are barren of fossils in the Votf 

 lower parts, but in the upper hundred feet contain about thirty 

 species of fairly well preserved fossils. At this point the beds 

 are much distorted, the fossils having an average elongation of 

 one-fourth their original measurements. The strata are much 

 softer and thinner bedded than those of the preceding section, to 

 which is perhaps due their greater distortion from pressure. 

 None of the species from this and the preceding locality are 

 precisely identical, though there are certain species common 

 to the two localities which are closely allied to each other. 



The third locality which gives hopes that it may prove the 

 basis for a separate horizon is that shown about one mile north- 

 east of Dennysville. As yet this locality has been imperfectly 

 studied : the beds appear some distance below the water line in 

 very solid ledges which will require a considerable use of powder 

 before they will freely yield their fossil contents. The small 

 amount of material gathered seems to indicate that the deposits 

 are closely related to those of the Orange Bay section, but 

 probably represent a separate and inferior horizon. 



On the eastern shore of Seward's Neck near the north end 

 of Roger Island, and again at Reynolds' Cove, there are con- 

 siderable exposures of compact, thick-bedded limestone which 

 distinctly differ in their general aspect from the other horizons 

 of the series ; there are only a few species of fossils in this sec- 

 tion and these are very imperfectly preserved. 



On the Denbo shore, i. e., the western shore of Great South 

 Bay at about one and one-half miles south of Denbo Point, 

 there is a locality exhibiting very massive beds of limestone hav- 

 ing a rich brachiopodal fauna. The contained fossils have been 

 very much modified by pressure, being very greatly extended in 

 the northeast and southwest axes. The outcrop of these strata 

 consist of singularly smooth " roches moutonees," from which 



