Topographical Features of the JVew Haven region. 69 



One on the Woodbridge heights, 1^ m. southwest, about 10 feet 

 in its diameters, but now in halves. 



One in the northern part of the Edgewood grounds, a mile southeast 

 of the last, and 2 m. a little west of south from the Judges' cave, 

 about 8 feet cube. 



Three others, half a mile south of the last, in the same grounds, 

 measuring 25, 18^ and 8^ feet, 14, 8^ and 7 feet, 8, 5 and 4 feet. 



One near the Derby turnpike, -^m. E. of S. of the last, of 14, 6 and 5 

 feet in its diameters. 



One in the woods north of the Stoeckel farm, \ m. S.W. of the last, 

 and in the same line nearly with the Judges' cave and the Edgewood 

 boulders. 



On the Milford turnpike nearly a mile east of south of the latter, 

 \ m. west from Allingtown, measuring IJ), 8 and 5 feet. 



One at Savin Rock, farther sovith, 8, 6 and 4 feet. 



These masses are all on the western border of the New Haven re- 

 gion. The height given in each case is the height above ground, the 

 depth to which the boulder extends below the surface being uncertain. 

 Many of those that formerly lay over these heights have been bi-oken 

 up for use in house-building. 



Over the same region sandstone boulders are numerous, but they 

 are seldom very large, owing to the nature of the rock. One of 

 tabular form on Boulder Hill measures 21, 15 and 5 feet. 



There ai-e also large trap boulders more to the eastward. One on 

 Sachem's ridge measures 16 feet in length and 8^ in gi'eatest breadth; 

 and one in East Haven, back of Mr. Woodward's, of 11, 9 and 6 feet. 



There are also occasional masses of native copper derived from the 

 copper mines of the Connecticut trap and sandstone region. A mass 

 from the vicinity of East Rock, given to the Yale Cabinet by Mr. Eli 

 W. Blake is probably of this kind. Another weighing 90 lbs. was 

 found early in the century on the Hamden Hills. 



2. Depositions over the loaters. — The New Haven bay in the Cham- 

 plain era covered the whole breadth of the New Haven region, from 

 the Woodbridge range on the west to the sandstone ridges of East 

 Haven and North Haven on the east, and spread northward into Ham- 

 den. East and West Rocks, Pine Rock and Mill Rock were cliffs 

 within its area, or on its borders. Sachem's ridge was a long north- 

 and-south peninsula south of Mill rock : and the Beaver Hills, another 

 south of Pine Rock. The Beaver Pond region was, for a while at least, 

 the deep central portion of the New Haven bay ; it lay in the interval 

 between Mill Rock and Sachem's Ridge on one side, and Pine 



