GEOLOGY OF THE CONNECTICUT VALLEY DISTRICT. 397 



On the west slope of Home hill are several prominent veins of quartz, 

 perhaps the continuation of those carrying a little argentiferous galena 

 at the Ascutney Mining Company's property in Hartland. These occur 

 at the house of Capt. C. Gallup. Near the old Hart's Island bridge the 

 schists dip south of east, A mile south-west of the plain the dip is 35° S. 

 E., and 30° S. W. at A. K. Reed's, two miles north. The most northern 

 outcrops of this rock on the hill road north from the plain are at L. Wil- 

 liams's, on the west side of Prospect hill. 



Cornish is nearly all underlaid by this formation; and the character- 

 istic topographical features of a limestone country are well exhibited 

 both here and in Plainfield. This consists in rounded steep hills and 

 deep valleys, everywhere fertile. Along Connecticut river the normal 

 dip is easterly. At E. Pike's, at the most north-western road fork in 

 the town, the dip is 75'' south-east. At the crossing of Blow-me-down 

 brook, near its mouth, we see dips in both directions, making an anticli- 

 nal. The westerly dip is shown nearly a mile farther south, at Capt. D. 

 D. Freeman's, and in small, rocky islands in the river. Near Windsor 

 bridge the dip somewhat south of east prevails to the exclusion of the 

 other, save as it may exist unseen beneath the waters of the Connecticut, 

 The strike carries the easterly dip in such a way that we may believe in 

 the existence of an anticlinal certainly two miles long, and lying near a 

 Huronian ridge (Dingleton hill, p. 364). The westerly crowding of the 

 older ridge would naturally produce this arching of the strata. 



The rest of Section V, through the central part of Cornish (Fig. 62), 

 gives a good idea of the position of these rocks, the dip being mostly in 

 an easterly direction. At the east edge of the formation the schists dip 

 about 57° S. 30° E. This is on the east side of Parsonage hill; and the 

 dip 60° S. 50° E. occurs next, the strata being much crumpled and de- 

 cayed. At the town farm and hall the limestone is abundant, and the 

 dip is 57° S. 40° E, Near the Methodist church, on reaching Bryant's 

 brook, there are bands of a decomposing, fine-grained white granite, 

 dipping 85° N. 30° W. At the school-house No. 11, hornblende schist 

 occurs, dipping 55° N. 70° W. East of a cemetery it is more massive, 

 and is properly a diorite. West of this, near the saw- and grist-mills, 

 the Calciferous schists recur, crumpled, and dip 57° E. This is just east 

 of the Dingleton Hill Huronian ridge. Two faults probably exist here, 



