SCIENTIFIC SURVEY. 299 



In tbe town of Carroll in Penobscot county the principal rock is 

 mica schist. It is the only rock seen upon the east and west road 

 running through the town. At Mr. II. Gates' in the west part of the 

 town is a very fine bed of dark bluish limestone, whose layers dip 

 45° N. W. The bed is several rods wide and of unknown length. 

 Mr. Gates manufactures from 100 to 300 barrels of quicklime 

 annually out of this bed. It is capable of producing much more, 

 and furnishes lime equal to the best. It can be produced cheaper 

 here than at Rockland, and can successfully compete with that in 

 the market hereabouts. Hints of other beds of limestone in Car- 

 roll reached us in both directions, particularly in the north-east. 

 There is said to be a bed on the land of Mr. Ames. A similar 

 bed also may be found on Mr. CoflSn's land, near the centre of the 

 town. These limestones correspond better to the beds in Azoic 

 schists than w ith the Eolian limestone on Penobscot bay. 



The mica schist of Carroll extends uninterruptedly as far as Mus- 

 quash lake in Topsfield, in an easterly direction. In the east part 

 of Carroll there is an anticlinal axis, the limestone being upon the 

 western side. The south-east dip extends to Musquash lake, and 

 into Tallmadge and the Indian township. The north-west dips 

 occur at the saw-mill in Tallmadge, and about three miles from 

 Princeton in the other township. These observations indicate the 

 presence of a synclinal. 



A high range of mountains in the south part of Carroll is evi- 

 dently granitic, and connects as a mountain range with the syenite 

 on Musquash lake, and has been traced into New Brunswick ; and 

 the provincial geological map carries this granitic belt entirely 

 through the province to the Gulf of St. Lawrence. A large portion 

 of the Western Schoodic region is granitic, forming a belt several 

 times wider than it appears in Topsfield. We have evidence of 

 the existence of granite on the north side of Pleasant lake, on Mill 

 Privilege lake, Scragly lake, the third Chain lake in No. 4 Han- 

 cock county, upon Stone island in the west part of Witteguergua- 

 gum or Grand lake, and at the west end of West Musquash lake 

 in Tallmadge. This gives us an elliptical granitic expansion of the 

 great range, of fifteen miles long and ten miles wide. It probably 

 extends to meet the granite of Greenfield, if not the range extend- 

 ing through Dedham, Orland, etc., to Mount Desert. East of the 

 granite the rock is mica schist all the way to Princeton. We saw 

 such ledges on Wawbawsoos lake, and Mr. Kelley of Calais states 

 that he has seen them on the upper Machias lakes. 



