44 BIBLIOGRAPHY AND INDEX OF N. A. GEOLOGY, [bull. 146. 
203 Heilprin (Angelo). The Port Kennedy deposit [Pennsylvania]. 
Phila. Acad. Nat. Sci., Proc. 1895, p. 451 (J p.). 
Discusses briefly the faunal evidence of the age of the deposit. 
204 The glaciers of Greenland. 
Pop. Sci. Monthly, vol. xlvi, pp. 1-14. 
Describes and illustrates the glacial phenomena of Greenland. 
205 Hershey (Oscar II.). The Columbia formation in northwestern 
Illinois. 
Am. Geol., vol. xv, pp. 7-24. 
Describes the character and distribution of the three members of the 
Columbia formation, the Florence gravel, valley loess, and upland loess. 
Discusses the relation of the loess to the drift, the sequence of glacial 
history in northwestern Illinois, and the correlation with the Columbia 
formation in the Lower Mississippi Valley. 
206 The Devonian series in southwestern Missouri. 
Am. Geol., vol. xvi, pp. 291-300. 
Describes the occurrence of the Eureka shale in Arkansas and of the 
other Devonian rocks of the Ozark series. Discusses the evidences of 
elevation and subsidence in this region, and the correlations indicated 
by the lithologic and stratigraphic relations. 
207 River valleys of the Ozark plateau. 
Am. Geol., vol. xvi, pp. 338-357. 
Describes the extent and character of the Jura-Cretaceous peneplain 
and the Tertiary aud Quaternary valleys. Discusses the cause of the 
meandering courses of the rivers and of the comparative straightness of 
the Missouri Valley. Describes the deposits of local drift in the valleys, 
considered to be equivalent to the Lafayette formation. Describes the 
post-Lafayette elevation, the Columbian formation, and the post-Colum- 
bia elevation, and gives a summary of the geologic history of the Ozark 
plateau since the Jurassic period. 
208 On a Devonian limestone breccia in southwestern Missouri. 
Science, new ser., vol. i, pp. 676-678. 
Describes the character of a limestone breccia deposit in Stone County, 
Mo., and discusses the causes of its formation. 
209 Hice (R. R.). The inner gorge terraces of the upper Ohio and 
Beaver rivers. 
Am. Jour. Sci., 3d ser., vol. xlix, pp. 112-120. 
Describes the character and the process of formation of the terraces 
of the Ohio and Beaver rivers in Pennsylvania and the relations of the 
terraces and rock benches. Considers that the rock benches of the two 
rivers belong to the same series, and that the inner gorge was formed 
during two periods. Reviews the evidences which show the existence 
of a buried channel and the character of the alluvium. Gives a list of 
the principal papers on this subject. 
210 Hill (Robert T.). Discovery of a dicotyledonous flora in the Chey- 
enne sandstone. 
Am. Jour. Sci., 3d ser., vol. xlix, p. 473 (communicated). 
Contains brief remarks on the discovery of a dicotyledonous flora in 
the Cheyenne sandstone in the basal beds of the Comanche series in 
southern Kansas. 
