lO STRATIGRAPHICAL GEOLOGY. 



thus named by him near Bridgeport is hthologically iinh'ke the New 

 Hampshire rock, resembhng, however, a portion of our Bethlehem group. 

 In Maine, there is a small area midway between Rangeley lake and the 

 Kennebec river in the west, and along the Penobscot river at the granite 

 quarries. An unusually broad band of it lies between Bangor and Ells- 

 worth, represented in one of the long sections in this chapter. The other 

 areas are mainly of the undetermined granites. The largest is connected 

 with the porphyritic granite just mentioned, and it reaches from the 

 islands of Penobscot bay, or possibly St. George, to the Bay of Chaleur 

 on the Gulf St. Lawrence, a distance of 290 miles, and a width of from 

 two to twenty-two miles. That near New Bedford, Mass., is along the 

 same general line of outcrop. It is everywhere flanked by the Huronian. 

 In the neighborhood are the similar areas of eastern Hancock and west- 

 ern Washington counties. Me., and the one extending from Addison, Me., 

 nearly to the St. John's river. A portion of this latter area is called 

 Laurentian by Bailey and Matthews in the New Brunswick report, and 

 they are all referred to this horizon in the topographical atlas of Canada. 

 Another important granitic area is that of Mt. Katahdin. Much of it is 

 surely not porphyritic, and is not unlike certain Labrador granites. As 

 all these granites are quite ancient, they are associated together in the 

 representation of their geographical positions, though not necessarily 

 identical in age. 



Atlaiitic System. This system commences at New York city, and ex- 

 tends north-easterly through Connecticut, thence more northerly through 

 Massachusetts and Vermont, along the Green Mountain range into Can- 

 ada. Probably the Montalban and Lake groups are both represented, 

 especially in western Connecticut. The Green Mountain range has some 

 relation with the Montalban. The eastern Connecticut range branches 

 first to New Bedford, second to near Newburyport, third to Manchester, 

 N. H., and fourthly along the western part of New Plampshire continu- 

 ously to the White Mountains, and thence as far as the Androscoggin 

 lakes in Maine. From these lakes the presence of this rock is general 

 west of the Androscoggin river, west of the Kennebec and Penobscot 

 rivers, also below Augusta and Bucksport. Small areas exist at the 

 head waters of Dead river in Franklin county, in New Brunswick, and 

 Nova Scotia. The areas of this .system in Newfoundland arc not yet 



