SOME GLACIAL WASH-PLAINS. 75 



1893. J. B. Woodworth,' in a paper entitled "An 

 attempt to estimate the thickness of the ice-blocks which 

 gave rise to lakelets and kettle-holes, " mentions several 

 glacial lakelets in the sand-plains of this district, and 

 discusses the bearing of otitlet creases to marine submer- 

 gence. 



1896. J. B. Woodworth-^ describes "The Retreat of 

 the Ice-sheet in the Narragansett Bay region," enumerat- 

 ing several successive lines of sand-plains in southeastern 

 Massachusetts and Rhode Island. 



1896. In a later note^ the last author gives reasons for 

 thinking that certain sand-plains in the Narragansett Bay 

 region were deposited above sea-level. 



1896. Prof. W. O. Crosby and Mr. A. W. Giabau^ 

 refer certain wash-plains in Hingham and Weymouth to 

 deposition in a lake held up by the retreating ice front. 



1896. Messrs. Shaler, Woodworth and Marbut, in a 

 paper on " The Glacial Brick-clays of Rhode Island and 

 southeastern Massachusetts," describe some of the wash- 

 plains and attendant clay deposits of this area.^ 



1898. Mr. M. L. FuUers writes on " The Champlain 

 Submergence in the Narragansett Bay Region," and at- 

 tempts to show that wash-plains in that area were depos- 

 ited at sea-level. 



1898. Professor Shaler,^ in a paper on the "Geology 

 of the Cape Cod District," describes the moraines and 

 underlying deposits. 



1899. J. B. Woodworth** publishes "The ice-contact 



1 Am. Geol. vol. XII, 1393, pp. 270-284. 

 ' Am. Geol. vol. XVin, 1896, pp. 150-168. 

 » Am. Geol. vol. xvni, 1896, pp. 391-392. 



* Abstract in Science in, 1896, pp. 212-213. 



» 17th Annual Report, U. S. Geol. Survey, pt. 1, 1896, pp. 9.51-1004. 



• Am. Geol. vol. XXII, 1898, pp. 310-321. 



' 18th Annual Report, U. S. Geol. Survey, 189S, pt. li, pp. 497-.'i93. 

 •Am. Geol. vol. XXII, 1899, pp. 80-86. 



ESSEX INST. BULLKTIN, VOL. XXIX 6 



