200 



CAPE COD GEOLOGY 



1892. Woodwokth, J. B. Note on the occurrence of erratic Cambrian fossils in Neocene 



gravels of the island of Marthas Vineyard: Am. Geologist, 9, pp. 243-247. 



Announces the finding of fossiliferous chert pebbles in the osseous conglomerate at 

 Gay Head and West Tisbury. These were later shown to be of Silurian age. See U. S. 

 Geol. Survey Mon. 33, p. 113. 



1893. Beyson, John. The glacial geology of Marthas Vineyard compared with that of Long 



Island: Am Geologist, 11, pp. 210-212. 



Points out the striking similarity between the two areas. Differs with Shaler in 

 regard to the origin of the outwash plain and its channels — believes these were formed 

 by waters flowing from the glacier. Thinks that the submerged tree stumps do not 

 necessarily indicate submergence. 



1893. Hollick, C. Arthur. Observations on the geology and botany of Marthas Vineyard: 



Trans. New York Acad. Sci., 13, pp. 8-22. 



Reviews the previous descriptions of the geology of the island and adds results of 

 his own observations. Compares the geology of Staten Island and Long Island with 

 that of Marthas Vineyard. Ascribes the structure of the beds on all three islands to ice 

 shove. 



1894. Dall, W. H. Notes on the Miocene and Pliocene of Gay Head, Marthas Vineyard, 



Mass., and on the "land phosphate" of the Ashley River district, S. C: Am. Jour. 

 Sci., 3d ser., 48, pp. 296-301. 



Gives a list of Miocene and Pliocene fossils from Gay Head and Chilmark, which 

 he has identified. Describes two species. 

 1894. Hollick, C. Arthur. Dislocations in certain portions of the Atlantic Coastal Plain 

 strata and their probable causes : Trans. New York Acad. Sci., 14, pp. 8-20. Abstract, 

 with discussion by N. S. Shaler, in Bull. Geol. Soc. America, 6, pp. 5-7; Am. Geologist, 

 14, pp. 197-198. 



Upholds Merrill's view that the dislocations of the Coastal Plain strata are due to 

 the action of ice. Gives several arguments in support of this view. 

 1894. Shaler, N. S. Pleistocene distortions of the Atlantic seacoast: Bull. Geol. Soc. America, 

 5, pp. 199-202. Abstract in Am. Geologist, 13, 143-144; Am. Jour. Sci., 3d ser., 47, 

 p. 138. 



Contends that the folding in the older beds on Marthas Vineyard can not be at- 

 tributed to the action of ice, because there was a well-developed pre-glacial topogra- 

 phy, now identified as pre -Wisconsin. Does not admit the possibility of an earlier ice 

 advance. 



1894. Woodw t orth, J. B. Postglacial seolian action in southern New England: Am. Jour. 



Sci., 3d ser., 47, pp. 63-71. 

 Describes several places on the island where postglacial seolian action occurs. 



1895. Hollick, C. Arthur. Marthas Vineyard Cretaceous plants [abstract] : Bull. Geol. 



Soc. America, 7, pp. 12-14; Am. Geologist, 16, p. 239; Science, new ser., 2, p. 281. 

 Describes about a hundred species of fossil plants, which he assigns to middle 

 Cretaceous time. Regards them as closely related to those collected from deposits 

 on Long Island and Staten Island equivalent to the " Amboy clay series." 



1895. Ward, L. F. The Potomac formation: U. S. Geol. Survey Fifteenth Ann. Rept., pp. 



307-397. 



Regards the Cretaceous deposits on Marthas Vineyard as the latest phase of the 

 Potomac. 



1896. Marsh, O. C. The Jurassic formation on the Atlantic Coast: Am. Jour. Sci., 4th ser., 



2, pp. 443-447; Science, new ser., 4, pp. 805-816. 



Believes that the clays exposed on Marthas Vineyard are Jurassic, because of their 

 resemblance to the clays of Wyoming and Utah. 



