MOUNT GRETLOCK. 165 



east, and dips 30 to 35 rust. Immediately east <»t' the bridge the land 

 rises 40 to 50 feet, forming what is called Sawmill hill. In the schist, 

 along the foot of this hillock the cleavage strikes north 7° to 10° east, and 

 dips 50 I" 60 east, but plications are visible here and there, striking east 

 or northeast, and dipping south or southeast. The same is true of the out- 

 crops farther up the hill. These observations are confirmed by those at 

 locality 1098, at the north end of Deer hill, along the Green river, where 

 the schist plications dip 45° southeast and are crossed by cleavage planes 

 dipping 40° east in one place and in another 70° east. On the top of 

 the hillock the most northerly outcrop is limestone with somewhat curved 

 strata, striking north 5 C east, and dipping 35° to 40° east, underlaid 30 feet 

 west l>v schist, with a foliation (cleavage) having a like dip. About 100 

 and 140 feet south of this limestone outcrop there are two small masses of the 

 same lock with coarse, steep westerly or vertical plications. These may be 

 ledges. From all this it has been inferred that the schists of Sawmill hill, 

 instead of underlying the limestone as represented in Emmons's section, are 

 continuous with those of Deer hill, and overlie the limestone; that the super- 

 position of the limestone is the result of an overturn and a fault which have 

 caused the schist to dip southeast and the really underlying limestone to 

 overlie it with an eastern dip; and that this fault reappears southward, on 

 the east side of Deer hill, where it has brought up the Oak and Stone hill 

 quartzites, which underlie the limestone, to the level of the schists which 

 overlie it, causing a displacement of about 1,400 feet. 



The section now traverses 1 >eer hill. On the northwest side of the hill, 

 at the Green river, layers of calcareous schist with blue quartz alternate 

 with a calcareous, ferruginous quartzite, all dipping 40° east. Their exact 

 stratigraphic position is not determinable, but as they are separated from 

 the Stone hill quartzites by a considerable area of limestone, as there is no 

 evidence of a fault there, and as the schists of Deer hill clearly overlie the 

 limestone at localities 7, 8, and 630 on the west, these particular layers have 

 been regarded as representing simply a transition from the lower limestone 

 to the lower schist. The portion of Deer hill traversed by Section H has 

 for these reasons been construed as a syncline, with a fault on its eastern 

 side. 



