398 Report of the State Geologist. 



I) wight, W. B., 1880: Description of a' new discinoid Brachiopod from the 



Trenton at Newburgh, N. Y. A. J. S. (3), XIX., p. 451. 

 Dwight, W. B. : An interesting geological locality at Cornwall, Orange 



county, N. Y. Trams. Vassar Bros. Inst., II., p. 74. 

 Dwight, W. B. : The peculiar structure of Clark's clay beds near Newburgh. 



Trans. Vassar Bros. Inst., III., p. 86. 

 Dwight, W. B., 1<SS4: Recent investigations and palaeontological discoveries 



in the Wappinger Limestones of Dutchess and neighboring counties, 



New York state. Proc. A. A. A. S., XXI., p. 384; Nat. Leis, Hour 



and Mug. Bull. No. 18, May, 1884, p. 4. 

 Hunt, T. S., 1886 : Reference to discovery of fossil plants in the Skunnemunk 



mountain belt. J////. Pfays. ami Physiog., p. 591. 

 Kemp, J. F., 1888: A Diorite Dike at the Forest-of-Dean, Orange county. 



A. J. S. (3), XXXV., p. 331. 

 Kemp, J. F., 1888: The Dikes of the Hudson River Highlands. Amer.Nat., 



XXII., p. 691. 



Kemp, J. F., and Hollick, A., 1893: The Granite at Mounts Adam and Eve 

 and its contact phenomena. Ann. X. Y., Acad. Sri. VII., p. 638. ' 



Martin, D. S., 1871: The Coal of Orange County, N. Y. Proc. Lyc. Nat. 

 Hist.. I., p. 259. 



Mather, W. W., 1842 : Report on Geol., 1st Dist. N. Y. Various references. 

 Merrill, F. J. H., 1886: Ret On the age of the Green Pond, Bearfort and 



Skunnemunk mountain rocks. X. J. Geol. Surv., 1886, p. 113. 

 Prosser, C. S., 1892 : Notes on the Geology of Skunnemunk Mt., Orange Co., 



N. Y. Trans., A". Y., Acad. Sol, XL, June, 1*92. 

 Prosser, C. S., 1894: The Devonian System of Eastern Pennsylvania and 



New York. Bull" U. S. Geol. Surv., 120. 

 Ries, II., 1891 : The Clays of the Hudson River Valley. Trans. X. Y. Acad. 



Sci., Nov., 1891. 



Ries, H., 1895: The Clay Industries of New York. Bull. X. Y. State 



Museum, Vol. III., No. 1 2. 

 Smock." J. C, 1889 : The Iron Ores of New York. Bull. N. Y. State Museum, 



Vol. II., No. 7. 



Smock, J. C, 1889: The Building Stones of New York. Bull. X. Y. State 



Museum, Vol. II., No. 10. 

 Smock, J. C, 1884 : Ref., Ann. Kept, N. J. State Geologist, pp. 29, 4(i and 51. 

 Van Hise, C. R., 1892 : Ref., Orange Co., p. 415. Bull. U. S. G. S, No. 86. 



