506 REVIEWS 



deposits are briefly discussed. The river valleys are more or less filled with sand and 

 gravel occurring occasionally as eskers or kame-like mounds. There are also extensive 

 bowlder-strewn plains. The country explored is regarded as a partly dissected table- 

 land with a trap-capped cuesta. 



Wii.soN, W. J. Western Part of the Abitibi Region. Geol. Surv. Canada, 

 Summary Rept. for 1091, pp. 115-28, 1902. 



Describes briefly streams, lakes, soils, topographic features, surface deposits, cli- 

 mate, and game, as well as the hard-rock geology. 



UNITED STATES. 



Manning, P. C. Glacial Potholes in Maine. Proc. Portland Soc. Nat. 

 Hist., Vol. II, pp. 185-200, iQOi. 



Describes the occurrence and character of the potholes along the coast of Maine 

 and discusses the evidences indicating their origin. (Review by F. B. Weeks. Paper 

 not examined.) 



NEW HAMPSHIRE. 



Hitchcock, C, H. Interglacial Deposits in the Connecticut Valley. Bull. 

 Geol. Soc. Am., Vol. XII, pp. 9, 10, 1901. 



Interglacial is not used in the customary sense, but has reference to deposits 

 made in the midst of an episode of glaciation. Deposits underneath the eskers are 

 called interglacial because they were formed earlier than the eskers. There are 

 deposits of tough clay which have been contorted apparently by pressure induced by 

 the overlying glacier. It is thought that the features support the view that a local 

 Connecticut valley glaqier succeeded an ice-sheet which had a general southeasterly 

 movement. 



VERMONT. 



FiNLAY, George. Granite Area of Barre, Vermont. Ann. Rept. State 



Geologist for 1902, pp. 46-8. 



Describes sand plains and eskers in the vicinity of Barre, as well as the crystal- 

 line rocks. The features are thought to support the view that one esker at least is of 

 subglacial rather than superglacial origin. 



MASSACHUSETTS. 



Clapp, F. G. Geological History of Charles River. Tech. Quart., Vol. 



XIV, Nos. 3 and 4, 1901 ; also Am. Geol., Vol. XXIX, pp. 218-33, 1902. 



An interpretation of the causes for the very devious course of the river is pre- 

 sented and the several stages of development discussed. A map sets forth the probable 

 course of pre-glacial streams in the Charles River basin and vicinity. The retreat of 

 the ice is supposed to have been such that a glacial lake was held in this drainage 

 basin whose extent and whose outlets varied with the position of the ice-front The 

 several distinct levels are discussed and named. These lake outlets control to some 

 extent the course of the present river. 



