MARYLAND GEOLOGICAL SURVEY 49 



Uhler, P. E. The Albirupean Formation and its nearest relatives in 

 Maryland. 



Proc. Amer. Phil. Soc, vol. xxv, 1888, pp. 42-53. 

 Notes Columbia deposits overlying older formations. 



1889. 



Clark, Wm. B. Discovery of fossil-bearing Cretaceous strata in Anne 

 Arundel and Prince George's Counties, Maryland. 



Johns Hopkins Univ. Cir. No. 69, vol. viii, 1889, pp. 20-21. 



In a number of localities in the Cretaceous section of the State, sections are given 

 which include the Pleistocene capping. The statement is also made that at certain 

 places the Cretaceous strata are entirely concealed by the Quaternary deposits. 



Fontaine, W. M. Potomac or Younger Mesozoic Flora. 



Mono. U. S. Geol. Surv., No. 15, 1889, 377 pp., 180 plates. 



House Misc. Doc, 50th Cong., 2d sess., vol. xvii, No. 147. 



(Rev.) Amer. Jour. Sci., 3d ser., vol. xxxix, 1890, p. 520 (L. F. W.). 



Amer. Geol., vol. v, 1890, p. 315. 

 The Quaternary deposits are frequently briefly mentioned in their relation to the 

 Potomac beds. 



McG-ee, W J The Geological Antecedents of Man in the Potomac 



Valley. 



Amer. Anth., vol. ii, 1889, pp. 227-234. 



Columbia deposits correlated with first epoch of ice advance. 



Uhler, P. E. Additions to observations on the Cretaceous and 

 Eocene formations of Maryland. 



Trans. Md. Acad. Sci., vol. i, 1889, pp. 45-72. 

 Refers briefly to Pleistocene deposits. 



1890. 



Clark, Wm. B. Third Annual Geological Expedition into Southern 



Maryland and Virginia. 



Johns Hopkins Univ. Cir. No. 81, vol. ix, 1890, pp. 69-71. 



Many Pleistocene sections are given from the southern Maryland region and also a 

 brief statement of Darton's and McGee's views. 



Uhler, P. E. Notes and Illustrations to " Observations on the Cre- 

 taceous and Eocene Formations of Maryland." 

 Trans. Md. Acad. Sci., vol. i, 1890, pp. 97-104. 

 Mentions Columbia deposits in Potomac valley. 

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