230 BOARD OF AGRICULTURE. 



crystals of feldspar — but more commonly an ordinary granite. At 

 the "Landing" in South Thomaston the rock is extensively quar- 

 ried, and its quality can safely be recommended. Perpendicular 

 seams or joints running N. 80° E. are quite numerous here, and 

 remind one of strata very much. Jointed seams of this char- 

 acter which have been superinduced after the formation of the 

 rock, as here, are commonly as true and evenly parallel as if elab- 

 orately chiseled out and smoothed by the hand of skillful lapida- 

 ries. The greater part of St. George is underlaid with granite, 

 as the may and some future remarks will show. 



The islands off the coast of St. George ara chiefly of granite, 

 and yield much fine stone for the market. Dix island, Seal Harbor 

 islands, White Head islands, Clarke's island and High island, are 

 certainly granitic. We are not informed as to the rock upon the 

 islands adjacent to the Muscle Ridge, but suppose them to be com- 

 posed of granite. 



In Gushing the granitic rocks are chiefly confined to a narrow 

 belt crossing the town a little below its geographical centre. Go- 

 ing south from Maple Juice Cove we come to syenite at a saw 

 mill not far from the Cushing church, and this soon is replaced 

 by granite, the syenite being upon its western border. The gran- 

 itic belt is nearly two miles wide and extends into Friendship, 

 where its extent is unknown to us. But the mica schist south of 

 the granitic belt, and the gneiss in the north part of Cushing, 

 abound with immense veins of granite, almost of suflScient impor- 

 tance, to be delineated upon the map. One in particular, of con- 

 siderable width, extends from the village of Cushing to South pond 

 in Warren, and is beautifully porphyritic. Other large veins 

 of granite occur in the gneiss west and north of South pond in 

 Warren. 



At the corners in the road beyond the south-east end of South 

 pond, is a large ledge of granite, and in the whole town of Warren 

 are many similar ones, not represented upon the map, still of con- 

 siderable dimensions. The second patch of granite, composing 

 Congress hill and vicinity, in Warren, is probably a patch of this 

 general description, only that is much larger. According to the 

 views presented in the Preliminary Report, (page 204,) concern- 

 ing the origin of granite, we should expect frequently in a gneiss 

 region to find large veins of granite. Congress mountain must be 

 about 900 feet high, and is in the north part of Warren. The 



