28 NEW YORK STATE MUSEUM 



The Matteawan inliers. The coarse granitic rock so character- 

 istic of the southern portion of the Glenham belt forms a small 

 inlier farther south in Matteawan. It begins in " Rock Hollow," 

 just west of the intersection of Washington avenue and the road 

 that connects the latter with Liberty street, and extends south across 

 Rock Hollow road (Walnut street) to Anderson street, and then 

 as a narrower strip to Grove street. (See map of Matteawan, 

 hg. 8.) The rock here is not quite so deeply chloritized as in the 

 Glenham belt. 



Another mass of similar rock, about 700 feet long by 400 feet 

 wide, lies to the south of this and forms the conspicuous knoll on 

 which the Matteawan schoolhouse' stands. The principal outcrops 

 are between Spring, East and Falconer streets. This mass almost 

 certainly connects with the gneisses in the eastern part of the town, 

 but outcrops are concealed along Mill, Louisa and Washington streets 

 and Mountain avenue between this mass and the westernmost out- 

 crop of the gneisses at the east. Limestone may overlie the gneiss in 

 this interval. The latter outcrops between Woodall and Henderson 

 streets, and presumably has or had an eastward extension from here. 



The first inlier described above is succeeded at the south by the 

 basal quartzite which forms a knoll between Anderson, Walnut and 

 Grove streets, and is separated from the Precambric on the north and 

 west by Anderson street. The contact could not be found; it may 

 be faulted. The quartzite is overlain by the limestone on the east 

 and south and on the west for a distance of 75 feet north of Grove 

 street. A small mass of slate has been faulted in between the lime- 

 stone and the spur of the Precambric on the west of Anderson 

 street, near the house of Mrs C. E. Phillips. 



At the northern end of the Glenham belt on the southwest side of 

 Vly mountain, north of the road at its base, a small knoll of quartzite, 

 overlain by limestone, has been faulted with the gneiss of the moun- 

 tain. It is separated from the main mass of foliated, reddish gran- 

 itic gneiss by a narrow gully. 



As noted above, a coarse granitic rock of a mineralogy quite 

 similar to that of the coarse granitic variety of the Glenham belt and 

 the inliers at the south, occurs in places in the bed of Mount 

 Beacon brook above the bridge. It occurs in outcrops among the 

 gneisses in the eastern part of the town and was noted on Prospect 

 street, 50 feet north of its junction with Walcott avenue and at the 

 corner of Vail avenue and Washington street. 



The mineral epidote is of frequent occurrence in the Glenham belt 

 and in places among the gneisses in the eastern part of the town of 



