GEOLOGICAL LITERATURE OF THE VIRGINIA COASTAL PLAIN. 33 



Pollard, Thomas. A Handbook, 144 pp., Riclimoncl. LS:;). 

 Bound in 22d. Ann. Kept, of Commissioner of Agriculture of the State of 

 Virginia, Richmond, 1879. 

 Xot seen. 



1880 



MicHELS. John. The Eichmond Diatomaceous Earth. 



Science, vol. i. pp. 222, 1880. 



The writer describes the occurrence of the diatomaceous earth and its general cbar- 

 acteristics. It is said to consist of 10 per cent, unbroken forms of diatoms, 25 per cent." 

 white sand, and the balance white clay. 



1883 



Fontaine, William M. The Artesian Well at Fort Monroe. Ya. 



Tlie Virginias, vol. iii, pp. 18, 19, 1882. 



The combined Eocene and Miocene strata in this well have a thickness of at least 

 800 feet. At a depth of 851 feet the boring was doubtless in Mesozoic strata, and at 

 885 feet the plant-bearing clay exposed at Dutch Gap was encountered. 



EoGERs, Wm. B. The Infusorial Deposits of A^irginia in the Fort 

 Monroe Artesian Well, 



The Virginias, vol, iii, pp. 151, 152, 1882. Reprint of Reports on the Geology 

 of the Virginias, pp. 731-736, New York, 1884. 



Of 40 species of diatoms from the infusorial stratum reached at a depth of 558 feet, 

 Mr. Samuel Wells reports that 29 are identical with species found at Richmond, thus 

 seeming to prove that they come from the same stratum. The presence of Cretaceous 

 strata between the Eocene and Jurasso-Cretaceous strata is also revealed in the same 

 well section. 



1883 



Heilprin, a. On tlie Relative Ages and Classification of the Post- 

 Eocene Tertiary Deposits of the Atlantic Slope. 



Proc. Acad. Nat. Sci., Phila., vol. xxxiv, pp. 150-186, 1883. 



Abstr. Amer. Nat., vol. xvii, pp. 308, 309, 1883: Amer. Jour. Sci., 3d ser., vol. 

 xxiv, pp. 228, 229, 1SS2. 



From a comparison of the fossils from the Miocene of Maryland, Virginia, and North 

 and South Carolina, the author concludes that the Miocene should be divided into three 

 formations — the Marylandian, including the oldest of the Maryland and Virginia Miocene 

 strata, the Virginian, including the upper strata in those states, and the Carolinian, 

 including the deposits of the Carolinas. 



1884 



Heilprin, a. Contributions to the Tertiary Geology and Paleontology 

 of the United States. 



117 pp.. map. 4°, Phila., 1884. 



The portions referring to Virginia are reprints of previous published articles men- 

 tioned above. On the map which accompanies the report a large area is shown as Caro- 

 linian, the upper division of the Atlantic Coast Miocene. 



