East llaven-Branford Region. 383 



"W. 1 also may antedate the tilting of the sandstone. I differ 

 from him, however, in making all the trap of the East Haven- 

 Branford region intrusive, and the western dikes, at least, of 

 later origin than the tilting of the sandstone. 



Note. — On the accompanying map the exposures of trap are 

 represented by solid black areas, except that the trap of Pond 

 and Toket Mts. is cross-lined. Separate ridges that are supposed 

 to be connected near the surface of the earth are joined by a light 

 line. Where sandstone has been observed between the ridges of 

 trap, the fact has been indicated by thickly-set dots. Some 

 strikes and dips of the sandstone have been recorded by using T's 

 and placing the number of degrees from the horizontal near the 

 stem and the declination from north or south near the cross line. 

 The small circles in E. 2 represent the trap-and-sanclstone rock 

 there. In the figures trap is indicated by crossed lines ; and sand- 

 stone and shale by parallel lines, the former by those which are 

 the farther apart. 



A — Silver-seeker's trench, west side of Pond Rock, sandstone. 

 B — Contact of trap of E. 2 with sandstone where the road from 



Branford to "Cherry Hill" crosses the ridge. 

 C — Lyman Granniss's house. 

 D- — Exposure showing dike-like character of some members of 



W. l. 

 F — Dikes on the road from New Haven to East Haven. 

 G — Dike in second railroad cut east of Center st., Fair Haven. 

 H — Exposure of overlying sandstone, northern hook of Pond Rock. 

 I — Brunford-Foxon road. 



K — Southern end of trap range next west of Toket Mt. 

 L — Southeastern end of range from Peter's Rock. 

 M — Southern end of ridge next north of Hemingway Mt. where it 



lies between layers of sandstone. 

 O — Southern most exposure of trap conglomerate. 

 P— Triple ravine formed by ridge of sandstone jutting into a 



ravine in the trap of Pond Rock. 

 Q — Complex set of dikes northeast of Foxon. No sandstone is 



exposed between these ridges and there probably is more 



or less connection between most of them. They seem to 



occur along two or three lines. 

 R — Exposure of sandstone near northwest angle of Pond Rock. 



Strike S. 81° E., dip 23° S. 



Tale University, June, 1889. 



