48 THE PLIOCENE AND PLEISTOCENE DEPOSITS OF MAKYLAND 



. 1887. 



McGee, W J The Columbia Formation. 



Proc. Amer. Assoc. Adv. Sci. s vol. xxxvi, 1887, pp. 221-222. 

 Discussion of Columbia formation about Washington, D. C. 



Ovibos cavifrons from the Loess of Iowa. 



Amer. Jour. Sci., 3d ser., vol. xxxiv, 1887, pp. 217-220. 



A brief discussion of the conditions along the Middle Atlantic slope during Qua- 

 ternary time. Also notes on the size of the boulders deposited in the Susquehanna, 

 Patapsco, and Potomac deltas in Quaternary time. 



White, I. C. Bounded Boulders at High Altitudes along some Appa- 

 lachian Rivers. 



Amer. Jour. Sci., 3d ser., vol. xxxiv, 1887, pp. 374-381. 



Especially pp. 279 and 2S0 which deal with the boulders on the eastern side of the 

 Alleghanies. Considers these deposits to be due to different causes ; submergence about 

 Washington — even to Cumberland — ice dams (Wright) on western slopes, and snow slides 

 which dammed the mountain streams. 



1888. 



Clark, Wm. B. On three Geological Excursions made during the 

 months of October and November, 1887, into the southern counties of 



Maryland. 



Johns Hopkins Univ. Cir. No. 63, vol. vii, 1888, pp. 65-67. 



Brief descriptions of Pleistocene deposits occurring in sections at several points in 

 southern Maryland. 



McGee, W J The Geology of the Head of Chesapeake Bay. 



7th Ann. Rept. U. S. Geol. Surv., 1885-86, Washington, 1888, pp. 537-646, 

 plates 56-71. 



(Abst.) Amer. Geol., vol. iv, 1889, pp. 113-115. 



The author discusses the hydrography, topography, exposures, and geological forma- 

 tions ; and concludes with a summary of the Quaternary history as recorded in the 

 Columbian formation, in its local and more general application. 



The Columbia Formation. 



Proc. Amer. Assoc. Adv. Sci., vol. xxxvi, 1888, pp. 221-222. 

 Brief paper on general relations and summary. 



Three Formations of the Middle Atlantic Slope. 



Amer. Journ. Sci., 3d ser., vol. xxxv, 1888, pp. 120-143, 328-331, 367-388, 448- 

 466, plate ii. 



(Absts.) Nature, vol. xxxviii, 1888, pp. 91, 190. 

 Amer. Geol., vol. ii, 1888, pp. 129-131. 

 Appomattox and Columbia are described at length. 



Paleolithic man in America; his Antiquity and Environ- 



ment. 



Pop. Sci. Mo, vol. xxxiv, 1888-89, pp. 20-36. 

 Discusses the geology at the head of the Chesapeake Bay. 



