VI. — The Granite at Mounts Adam and Eve, Warwick, Orange 

 Co., N. Y., and its Contact Phenomena. 



[Plates II and III.] 

 BY J. F. KEMP AND ARTHUR HOLLTCK. 



Read May 22, 1893. 



For five or six years past, one of us (J. F. Kemp) has been espe- 

 cially interested in the igneous rocks of northwestern New Jersey, 

 as developed in the Walkill Yalley. From several sojourns in the 

 region, the papers cited below have resulted/ While reflecting on 

 the great dike of elaeolite syenite near Beemerville, and casting 

 about for some other undoubted igneous body of commensurate 

 size and importance in the neighborhood, the granite of Mt. Adam 

 and Mt. Eve, across the New York State line, suggested itself. 

 Although this locality is familiar as a source of granite for build- 

 ing stone,^ search through the literature developed almost nothing 

 regarding its geological and petrographical character, which had been 

 written since Mather's Report on the Geology of the First District, 

 N. Y. State Survey, 1843. But even in this paper the granite is 

 only casually referred to, in connection with the neighboring white 

 and blue limestones, to the mineralogy of which the chief burden 

 of the report relates. The opportunity came to visit the locality in 

 June, 1892, and by the aid of the appropriation which the trustees 

 of Columbia College allow the geological department for field-work, 

 a party was organized, consisting of the two authors of this paper 

 and Messrs. Ries and Fenner, of the class of '92, School of Mines. 



1 J. F. Kemp, On Certain Porpliyrite Bosses in Northwestern New Jersey, 

 Amer. Journ. Sci., iii, xxxviii, 130. Elaeolite Syenite near Beemerville, N. J., 

 Trans. N. Y. Acad. Sci., vol. xi, p. 60, 1892. Basic Dike near Hamburg, 

 Sussex Co., N. J., which has been thought to contain Leucite, Amer. .Journ. 

 Sci., April, 1893, p. 298. Additional Note on Leucite in New .Jersey, Amer. 

 -Jour. Sci., March or April, 1894. 



2 J. C. Smock, Bull. N. Y. State Mus., vol. ii. No. 10, p. 231. 



Annals N. Y. Acad. Sci., VII, Feb. 1894. 



