298 STRATIGRAPHICAL GEOLOGY. 



The following occur north of the conglomerate towards Parker hill : 



Between U and V— 16, dip 75° S. 22° E. About V— 17, dip 80° south-easterly. 

 Near V— 16, dip 85° south-easterly. About V— 19, dip 88° N. 32° W. 



These observations establish the fact of a prevalence of a dip in the 

 direction N. 12° — 25° W. over the hill region occupied by the main range 

 of Lyman rock in the south part of the town. The variations to the 

 east may be due to local bendings and dislocations, explained partly by 

 the presence of newer strata. Along a line crossing the strata from J — 8 

 to P — 14 we have the following angles of inclination : 75°, 55°, 42° on top 

 of the ridge, 70°, 60°, 65°, 40° and 80°. From these observations alone 

 we are not warranted in concluding how many folds there may be. From 

 general considerations there is thought to exist at least one synclinal 

 over this main range. 



The occurrence of narrow bands of dark carbonaceous argillaceous 

 schists over this area, might, if properly worked out, illustrate the fold- 

 ings. Like much of the argillitic mica schist, this rock splits up into 

 long, narrow lenticular pieces, many of them being about the size of 

 artificial scythe stones. There seems to be a band of this rock traceable 

 from the Parker and Young lot across to the Dow conglomerate, F — 16, 

 and a longer one perhaps from near Jacob Williams's, G — 19 to T — 9; or, 

 rather, in the north-east part of the map, there are three bands of this 

 slate, viz., from R — 8 westerly, T — 9 to R — 10, and quite near the twisted 

 conglomerate, not far from Horace Aldrich's house, running towards 

 Q and R — 14. 



There are also large beds of white quartz, sometimes metalliferous, 

 which probably have a fixed stratigraphical horizon in this area. The 

 most marked is that along the eastern border, starting on the north at 

 the New Hampshire Gold company's mine north of the map area, crop- 

 ping out west of the Dodge mine, near the western line of J. Titus, or 

 near O — 6, between M — 5 and 6, at J — 12. These and other outcrops 

 are carefully laid down upon the map, as they may have economical 

 importance. 



A feature of greater stratigraphical importance than the quartz or 

 slate is the dolomite. This may be readily distinguished by its reddish 

 iron color, arising from decomposition, and it is unusually persistent in 

 distribution. It seems to follow the conglomerate very closely in all its 



