894 The American Geologist. December, 1894 
beyond the Park boundary. 'Throughout the entire field the higher 
mountain peaks rose above the in'v«' fields, though the high plateaux 
and broader mountain summits show considerable glacial abrasion and 
were unquestionably covered by moving ice." The evidences of the 
glaciation are. as usual, rounded and striated rock surfaces: the broad- 
ening of canons: transportation of boulders, sometimes from lower to 
higher elevations; the formation of moraines, kames, and valley gravel 
deposits, remnants of the last being now conspicuous river terraces: and 
the cutting of canons transverse to the mountain slopes and drainages 
in front of the glacier's termination. A very striking contrast is notice- 
able between the glaciated and unglaciated portions of the region. 
w. u. 
The Paleozoic Section in tli<_ vicinity of Three Forks, Montana. By A. C. 
Peale. With Petrographic Notes, by G. P. Merhill. (U.S. Geol. Sur- 
vey. Bulletin iJO. 50 pp.: Opiates, and two figures in the text. 1893. 
Price, 10 cents.) The section here described, between the East Gallatin 
and Missouri rivers, consists of Carboniferous, Devonian, and Cambrian 
strata, as determined by their fossils, aggregating nearly 10,000 feet in 
thickness, thrown into steep, northwestwardly dipping folds, and rest- 
ing on Archaean gneiss. Mr. Merrill describes rock specimens from the 
Archaean base of this section: from the next overlying Belt formationof 
micaceous sandstones and conglomerates, slates, and bands of silicious 
limestones, regarded as of Algonkian age: and from intrusive sheets in 
the Flathead shales, (he lowest member of the fossiliferous Paleozoic 
series and the onl.v one of its six formations which is traversed by erup- 
tive rocks. W. r. 
Annual Report of the Geological Surrey of Arkansas for 1S91(\S94). Vol. 
JT. doth, pp. ./• rind 340. J. C. Branner, State Geologist, Little Rock. 
This volume contains, with a colored geological map of Benton 
county, the following parts: The geology of Benton county, by F. W. 
Simonds and T. C. Hopkins: Elevations in the state of Arkansas, by J. 
C. Branner: Observations on erosion above Little Rock, J. C. Branner; 
Magnetic observations, J. C. Branner: The Mollusca of Arkansas, F. A. 
Sampson: The Myriapoda of Arkansas, by C. H. Bollman; The fishesof 
Arkansas, by Beth E. Meek; The geology of Dallas county, by C. E. 
Siebenthal; Bibliography of the geology of Arkansas, by J. C. Branner. 
The geology of Dallas county is accompanied by a contoured sketch- 
map of the county, the contour interval being 50 feet. N. H. w. 
Annual Report of the Geological Surrey of Arkansas for 1S92(1S94). Vol. 
II, cloth, pp. xviand ?07. J. C. Branner, Stale Geologist, Little Rock. 
The Tertiary <hoh«jy of southern, Arkansas, by Gilbert D. Harris, with 
a colored geological map. In a peculiarly difficult and unfavorable re- 
gion Prof. Harris has succeeded in making a valuable contribution to 
the geology of Arkansas and adjoining states, in which all students of 
the American Cenozoic will take interest. The Eocene series is made to 
••oiisist of the following parts, in descending order: Jackson stage, Clai- 
