82 BULLETIN OF THE 



The other trap mountaius about Meriden do not show the double form 

 so distinctly ; the second ridge on Higby has already been mentioned ; 

 on the back of West Peak the upper sheet may perhaps be identified in 

 certain ridges near the base of the wooded slope ; and if the observer is 

 ambitious of hard scrambling over rough trap ledges and waste branches 

 of felled trees, he may attempt to work out the faults and tlie double 

 sheet of Cat Hole ridges (3) to northeast of the Peaks ; but this is not 

 to be recommended as an easy return from the short walk of this busy 

 day. 



The eastward turn of the main sheet bluff from West Peak to the 

 Quarry bluff deserves a word. It seems to depend on three causes. 

 The strike of the beds changes from the general trend of N. 20° E. to N. 

 20° or 30° W. or more, and this alone accounts for much of the turn ; 

 the displacement on the faults accomplishes something in the same direc- 

 t.ion ; and finally the accelerated recession of the cliff faces where the 

 faults are numerous accomplishes the rest. The moderate altitude 

 maintained by the main sheet in the Cat Hole and Quarry ridge blocks, 

 where the fractures are numerous, bears witness to the effectiveness of 

 the last cause. 



Excursion 6. — North of West Peak. 



A final excursion may be made along the range north of West Peak. 

 I'or reasons that will appear later, the walk may be best begun at Cook's 

 Gap, where the New York and New England Railroad crosses the trap 

 range about three miles west of New Britain ; thence southward we 

 shall pass the Shuttle Meadow fault of the second day's excursion, and 

 afterwai-ds approach the northern side of the West Peak block. Taking 

 early train from Meriden to New Britain, connection may be made with 

 a local train on the New England Road, which on proper presentation of 

 the case may probably be induced to stop at the western side of Cook's 

 Gap, at a road crossing (1), Fig. 13. 



Cook's Gap is unlike most of the others of the region in crossing the 

 trap range almost at right angles, and thus indicating its independence 

 of the fault system. It may be an abandoned river course, like the 

 Reservc'r Notch. Farmington River comes out from the crystalline up- 

 lands on the west about opposite to this gap. 



The road at which we left the train follows the anterior ridge south- 

 ward : sometimes it approaches the bluff, from which an extended view 



