CAPE COD GEOLOGY 



201 



1896 



1896, 

 1897. 



1898. 



1898. 



1898. 



1899. 

 1900. 



1900. 



1902. 



Shaler, N. S., Woodwoeth, J. B., and Marbtjt, C. F. The glacial brick clays of 

 Rhode Island and southeastern Massachusetts: U. S. Geol. Survey Seventeenth Ann. 

 Rept., pt. 1, pp. 951-1004. 



Establishes the age of the older beds. Describes the nature and succession of the 

 Pleistocene deposits. Shows that the glacial epoch included three great periods of ice 

 action, which were separated from one another by long intervals. 

 Ward, L. F. Age of the island series: Science, new ser., 4, pp. 757-760. 



States that the fossil flora of the clay beds give indisputable evidence of their age. 

 Wood worth, J. B. Unconformities of Marthas Vineyard and of Block Island: Bull. 

 Geol. Soc. America, 8, pp. 197-212. Abstract in Jour. Geology, 5, pp. 96-97; Science, 

 new ser., 5, pp. 86-87. 



Describes in detail the structure and succession of the beds at Gay Head. Lists 

 seven unconformities. Gives a section of the Gay Head cliffs. Discusses the cause 

 of the folding and overthrusting and states that absolute proof of the theory of ice 

 thrust is lacking. States that if this theory is to be accepted the supposed results 

 must be attributed to two ice advances, which were separated by a long interval. 

 Both of these advances must have preceded by a long time the last advances. 

 Dall, W. H. A table of the North American Tertiary horizons correlated with one 

 another and with those of western Europe, with annotations: U. S. Geol. Survey 

 Eighteenth Ann. Rept., pt. 2, pp. 327-348. 



Includes the "Gay Head sands "under the Pleistocene and the " Gay Head gravels" 

 under the Miocene. The tables show the relative position of these beds and those of 

 the same epochs in other parts of North America and Western Europe. 

 Shaler, N. S. Geology of the Cape Cod district: U. S. Geol. Survey Eighteenth Ann. 

 Rept., pt. 2, pp. 497-593. 



Contains one chapter presenting a brief summary of the geology of Marthas Vine- 

 yard. Adheres, in the main, to his previous views. 

 Woodworth, J. B. Some glacial-wash plains of southern New England: Bull. Essex 

 Inst., 29, pp. 71-119, Salem, Mass. 



Includes description of the Marthas Vineyard plain, which appears to have risen 

 in the angular space between the two lobes of the ice front. 

 Upham, Warren. Glacial history of the New England islands, Cape Cod, and Long 



Island: Am. Geologist, 24, pp. 79-92. See U. S. Geol. Survey Mon. 33, p. 113. 

 Packard, A. S. A new fossil crab from the Miocene greensand bed of Gay Head, 

 Marthas Vineyard, with remarks on the phylogeny of the genus Cancer: Proc. Am. 

 Acad. Arts and Sci., 36, pp. 1-9. 

 Describes a new fossil crab, Cancer proavitus. 

 Woodworth, J. B. Glacial origin of older Pleistocene in Gay Head cliffs with note on 

 a fossil horse of that section: Bull. Geol. Soc. Amer., 11, 455-460. Abstract in Science, 

 new ser., 11, p. 102. 



Summarizes the evidence that the older Pleistocene bed is of glacial origin. Corre- 

 lates it with the Columbia because of its stratigraphic position and lithologic char- 

 acter. Announces the finding of an astragalus of a horse in beds supposed to be 

 Miocene. 

 Hollick, C. Arthur. Geological and botanical notes, Cape Cod and Chappaquiddick 

 Island, Mass.: Bull. New York Bot. Garden, 2, pp. 381-407. 



Includes observations on the topography, glacial deposits, and fossils of Chappa- 

 quiddick Island. The fossils consist of fragments of mollusks and plants found in the 

 drift. The plants include several well-known Cretaceous species. The mollusks are 

 not of the same age as those found at other places, but, according to Grabau, are 

 probably more recent. Includes a list of the fossil plants, with descriptions. 



