( 383 ) 



barre : the wrist at Truro ; and the sandy fist at Province- 

 town." 



The cape as a whole has been so thoroughly and ably 

 described and its features discussed, by Warren Upham,* 

 W. O. Crosby. f W. M. Davis! an ^ other more recent writers, 

 and it has been utilized so frequently in text-books for 

 examples of sea beach and shore topography and sculpture, 

 that any extended description here would be superfluous, and 

 it will probably be sufficient to merely recall that, geolog- 

 ically, the cape may be regarded as consisting of two parts : 

 a relatively old one, extending from the Highlands of Truro 

 southward, composed of morainal and modified drift material 

 and a more recent one, represented by the beaches and sand 

 dunes of Provincetown, and other smaller but similar areas 

 elsewhere, which have been built up by wave and wind action 

 from the eroded material of the older part. 



2. The Highlands of Truro. 



According to the information which I had been able to 

 obtain from published reports the Highlands of Truro ap- 

 peared to be the part of the cape in which Cretaceous material 

 would most likely be found, and my efforts were therefore 

 concentrated in that vicinity. 



These highlands represent the northernmost remnants of 

 the original land from which the cape was developed into the 

 form in which we know it to-day. They are a portion of the 

 morainal ridge, with elevations of one hundred to one hun- 

 dred and sixty feet above tide, and are composed of beds of 

 clay, sand and gravel, with occasional bowlders. In regard 

 to their general structure and the arrangement of the material, 

 they may be compared with the northern or more recent 

 branch of the terminal moraine, as represented on Orient 



* The Formation of Cape Cod. Am. Nat. 13 : 4S9-5C2, 552-565. 1879. 



t On the Occurrence of Fossiliferous Boulders in the Drift of Truro, on 

 Cape Cod, Mass. Proc. Boston Soc. Nat. Hist. 20 : 136-140. 1879. 



i The Outline of Cape Cod. Proc. Am. Acad. Arts and Sci. 31 : 303-332. 

 1896. 



