1893.] NEW YORK ACADEMY OF SCIENCES. 229 



The character of the rock was not understood at the time, 

 however, and it was not until a few years subsequently, when 

 specimens were found in situ, in connection with the clays at 

 Glen Cove, a locality between the other two, that their deriva- 

 tion was understood. 



On April 4, 1881, N. L. Britton read a paper before the 

 Academy "On the Geology of Richmond County, N. Y.,"* in 

 which the probable eastward extension of the cretaceous strata 

 through Staten and Long Island is mentioned, and on 

 November 7, 1884, Fredk. J. H. Merrill read a paper before 

 the Academy on the geology of Long Islandf, in which he 

 maintains a very conservative attitude in regard to the cretaceous 

 formation. The Exogxjra previously mentioned is referred to, 

 and also the leaf-bearing sandstone, but the evidence is 

 considered as too incomplete, and he merely concludes that 

 "The locality at which the strata most resemble the cretaceous 

 beds of New Jersey is at Glen Cove, where the clays already 

 described are probably of this age." 



Just previous to this time J. S. Newberry began his studies 

 of the Amboy clay flora, and shortly afterwards, his views were 

 briefly presented before the New York Academy of Sciences| 

 and the Torrey Botanical Club§. Dr. Newben-y was the first 

 to correlate these clays with the Dakota group of the west and 

 the Lower Atane beds of Greenland, by means of their fossil 

 floras, and his researches in this direction also enabled him to at 

 once identify the fossil leaves collected about the same time at 

 Glen Cove as identical with those from the Amboy clayS, and 

 thus to fix without question the cretaceous age of the strata^ 

 and similar further work in the same direction was subsequently 

 performed by R. P. Whitfield for the fauna]|. 



At a meeting of the New York Academy of Sciences, on May 

 11, 1885, Fredk. J. H. Merrill gave a description of the beds at 

 Gay Head, Martha's Vineyard, and referred them to the post 

 pliocene or quaternary.^ 



In 1888, a report upon the geology of Martha's Vineyard^''* 

 appeared, by N. S. Shaler, and in the following year one upon 



* Ann. N. Y. Acad. Sci. ii. 161-182 (1882). 



t Ann. N. Y. Acad. Sci. iii- 341-364 (1885). 



t Trans. N. Y- Acad. Sci. v. 133-1.')7 (1880. 



§ Bull. Torr. Bot. Club, xiii. 33-37 (1886). 



II Bull. Am. Mu3. Nat. His. ii. Art. viii. 113-116 (1889A 



II Trans. N. Y. Acad. Sci. iv. 78, 79 (1885). 



** 7th Ann. Kept. U. S. G. S. 297-363 (1888). 



