32 BIBLIOGRAPHY AND INDEX OF N. A. GEOLOGY, [bull. 149. 
162 Darton (Nelson Horatio). Nomini folio, Maryland and Virginia. 
U. S. Geol. Surv., Geol. Atlas of U. S., folio No. 23, 1896. 
Describes the physiography, lithologic character and succession of the 
Pleistocene and Tertiary formations, the geologic history of the Coastal 
Plain, and the occurrence of marl and clay. Includes topographic, geo- 
logic, and artesian well maps. 
163 Franklin folio, Virginia and West Virginia. 
U. S. Geol. Surv., Geol. Atlas of U. S., folio No. 32, 1896. 
Describes the geographic and stratigraphic features of the region, the 
character and distribution of the Silurian, Devonian, and Carboniferous 
rocks, the geologic structure, and the occurrence of iron, and the char- 
acters of the soils. 
164 Examples of stream robbiug in the Catskill Mountains [New 
York]. 
Abstract: Geol. Soc. Am., Bull., vol. vii, pp. 505-507, pi. 23, tig. 1,1896. 
Describes the phenomena and gives a map and cross section of the 
region. 
165 Notes on relations of lower members of the Coastal Plain 
series in South Carolina. 
Geol. Soc. Am., Bull., vol. vii, pp. 512-518, fig. 2, 1896. 
Describes the occurrence of the Potomac formation overlying the 
crystalline rocks and mentions the character and thickness of the other 
formations of the Coastal Plain series in this region. 
166 and Taff (Joseph A.). Piedmont folio, West Virginia and 
Maryland. 
U. S. Geol. Surv., Geol. Atlas of U. S., folio No. 28, 1896. 
Describes the physiographic and drainage features, the character 
and distribution of Silurian, Devonian, and Carboniferous rocks, the 
geologic structure and the occurrence of coal, iron, and building 
stones. Includes topographic, geologic and structure section maps 
and a sheet of columnar sections. 
167 Davidson (A. D.), Weller (S.) and. Petalocrinus mirabilis n. sp., 
and a new American fauna. 
See Weller (S.) and Davidson (A. D.), No. 735. 
168 Davis (William Morris). The quarries in the lava beds at 
Meriden, Conn. 
Am. Jour. Sci., 4th ser., vol. i, pp. 1-13, figs. 1-3, 1896. 
Describes the several beds of the quarries and discusses the evidences 
of the tilting and faulting that has taken place. 
169 Bearing of physiography on uniformitarianism. 
Abstract: Geol. Soc. Am., Bull., vol. vii, pp. 8-11, 1896. 
Discusses the origin and development of land forms in their bearing 
on the principles of uuiformitarianism. 
170 Plains of marine and subaerial denudation. 
Geol. Soc. Am., Bull., vol. vii, pp. 377-398, 1896. 
Refers to the English and American authorities as to the origin of 
broad plains of denudation. Reviews the arguments and discusses the 
results of marine and of subaerial denudation. 
