36 



Day, etc. — Determination of Mineral 



by Kiimmel (fig. 11), made at the base of the Palisades above 

 Jersey City. Fig. 12 is from a photograph at the Belle 

 Mountain quarry mentioned by Lewis.* A slab of variable 

 thickness here stands nearly vertical in the diabase sheet, and 

 appears conspicuously at the center of the picture. The 



Fig. 12, 



X 



Mfetf? 



cs 



«*►-■ 





Fig. 12. Slab of arkosic sandstone in the diabase sheet at the Workhouse 

 Quarry in Belle Mt., east bank of the Delaware River, above Moore, New 

 Jersey. (Photograph by E. B. Sosman, 24 July, 1913.) 



* Loe. cit., p. 135 (6). 



