74 BULLETIN OF THE 
the bold western slope of Chauncy. Peak. The fault has an offset of 
about 1500 feet and an overlap of similar value; its heave must be 
about 300 feet. Although of smaller displacement than the Great Fault, 
it manifestly belongs to the same system and contributes effectively to 
the rational explanation of the Triassic structure and topography. It 
probably determines the location of a ravine (7) southwest of the Berlin 
road towards Meriden, but I have not been able to follow it beyond the 
city, as outcrops are few and monotonous in that direction. On the 
other side of Lamentation Mountain, if there were time to go there, it 
probably causes a slight dislocation (9) in the posterior trap ridge ; the 
displacement is so small that in speaking of this part of the posterior 
ridge when describing the last stretch of the first day’s walk, the ridge 
was referred to as traceable with little interruption. If this identification 
is correct, it is probable that the throw of the fault decreases to the 
northeast, and that its line is somewhat curved, as indicated in the figure. 
The wide valley between Chauncy Peak and the north end of Higby, 
or Middletown Mountain, through which the return to Meriden was 
made on the first day, suggests a fault with throw of value interme- 
diate between that of the Great Fault and the one just described. Its 
examination may be conveniently begun by following the anterior of 
Chauncy Peak southward to its vague ending (10) near the Cromwell 
railroad. This termination must be near the southeast side of Chauncy 
Peak block. A wide swamp, in which the engineers of the Cromwell 
railroad found much difficulty in making a steady roadbed, conceals all 
outcrops for some distance, but by following the track for half a mile 
east from the end of the anterior, and then, at a point opposite the 
southern end of Chauncy Peak (11), crossing a little field to the south, 
several ridges of conglomerate (12) will be found in the woods ; they 
strike N. 35° E. and their beds dip about 10°, and after crossing four 
or five such outcrops, a low trap ridge (13) is found ; it is soon identi- 
fied as yet another appearance of the anterior sheet, for it stands in 
proper position with regard to the main sheet, which rises in the high 
mountain to the east; it is very scoriaceous on the back, where it is 
followed by a road; and at a few places it shows the ash and bomb 
structure that has already in two other blocks been found to characterize 
the anterior trap. It must be followed north to its end (14), which is 
indistinctly located shortly before reaching the Meriden—Westfield road. 
Sighting back from here, we find a bearing of about 8S. 65° W. will carry 
the fault line back to the southern point of the Chauncy Peak anterior ; 
the accordance with previous measures is satisfactory enough. But, in 
