258 GEOLoaY OF THE :n^areaga¥SETt basin. 



in the Silver Spring region. A quarter of a mile southwest of Norwood 

 Station, west of the railroad crossing, numerous exposures of sandstone 

 having a low easterly dip occur. 



WARWICK NECK. 



Eastward of Hills Grove and Norwood stations there are no exposures 

 In Warwick until Warwick Neck is reached. In the railway cut west of 

 the main road passing along the length of the neck, black carbonaceous 

 shales and some sandstone courses dip in a northerly direction. West of 

 the same road, a quarter of a mile south of the highest point of the neck, 

 sandstone is exposed. East of the highest point of the neck the hill- 

 sides, sloping steeply to the shore, show frequent exposures of sandstone 

 dipping at an angle of about 40^ E Nearer the foot of the hill carbona- 

 ceous dark shales make their appearance. The sandstone continues to be 

 well exposed for about a fifth of a mile southward. Northeast of these 

 exposures, north of a small pond where the shore turns northeastward to 

 Rocky Point, black shales dip low eastward. Corresponding bluish-black 

 shales and fine-grained sandstones are found a quarter of a mile north- 

 ward, along the road to Bay Side. There occur in succession, eastward: 

 Sandstone, forming the south end of the high ridge east of the road last 

 mentioned; conglomerate, forming the middle and northern part of this 

 ridge; sandstone, exposed at the noi^theast of the northern end of the ridge 

 and on the western side of the main hill occupied by the Rocky Point 

 booths; conglomerate, forming the eastern part of this hill, and a solitary 

 exposure farther northward, and then various sandstone layers as far east 

 as the point, the intervening courses not being seen, being probably some 

 softer shale. The strikes of the exposui^es at Rocky Point are N. 10^ W., 

 dip 20^ E. Many of the pebbles in the conglomerates at Rocky Point are 

 of considerable size. 



A short distance north of Sand Point, on the neck, sandstone and con- 

 glomerate are exposed dipping toward the northwest. At the southern end 

 of Warwick Neck, near the light-house, and for a short distance westward, 

 black carbonaceous shales and some sandstones are exposed dipping in gen- 

 eral northward, but suggesting in places a sort of contortion of the rocks by 

 a force acting in an east-west direction. 



