﻿48 N. S. Shaler — Geology of Cobscook Bay District, Me. 



shown by the fact that there is very little calcareous matter 

 in the numerous veins which are found in the rocks of this 

 series. 



13. 



Deer Likud 



2\fBantaqtifiddyBay 



Ideal section through Deer Island anticlinal. 

 A, A, Campobello series. B, B, sandstones and conglomerates: Perry series? 



It will be observed from the diagram atic section showing the 

 general geological character of Campobello and Deer Island, 

 that they are only obscurely anticlinal in structure ; being, in 

 fact, rather complicated upheavals of intermingled stratified 

 rocks and igneous intrusions. After the} 7 had been elevated 

 above the sea and much eroded an extensive series of sand- 

 stones and comglomerates, which are essentially like the ordi- 

 nary rocks of the Perry section were deposited upon their 

 flanks, or possibly over the whole of the Deer Island. A 

 further development of these axes, together with much subse- 

 quent erosion, has caused the Perry beds to appear only in the 

 downfold between these two'anticlinals. 



If the Cobscook series existed on the flanks of Deer Island 

 and Campobello, as was almost certainly the case, its beds had 

 been eroded before the Perry series of conglomerates was laid 

 down. 



It will require much further study to unravel the succession 

 of upheavals and subsidences which have taken place during 

 the deposition of these rocks. There is, however, the promise 

 of abundant reward for this enquiry, for it may throw very 

 important light upon the history of the development of this 

 continent. 



As yet the Campobello series has not been identified in place 

 immediately below the Cobscook series. But at various points 

 it is seen in positions which make it a fair inference that it 

 underlies the whole of this district. On the cape known as 

 Quoddy Head the Campobello series is well shown in a highly 

 metamorphosed condition. This series is traceable for three 

 miles to the westward; indications of it were found in the 

 region to the west of Denys River with dips which would take 

 it beneath the Cobscook series. 



In the further search along this coast for the beds of the 

 Cobscook series, it will be well for the observer to bear in 

 mind the fact that the Cobscook series probably lies immedi- 

 ately upon the more ancient beds of the Campobello series. 

 The series of rocks exposed on Campobello is probably well 

 developed along the coast of Maine. Rocks essentially simi- 



