54 PLEISTOCENE OF INDIANA AND MICHIGAN. 



Wooldeidge. C. W., The river-lake system of western Michigan: Am. Geologist, vol. 1, 1888, pp. 143-146. 



Notes that the lakes lie in channels bordered by till bluffs and are therefore not inclosed entirely by drifting 

 sand. Interprets postglacial history to include a stage when the water stood markedly lower than now, during 

 which deep valleys were cut on the east shore of Lake Michigan. Thinks this was followed by a stage when the 

 water stood higher than now and beaches were formed above the level of the present lake. 



The postglacial geology of Ann Arbor, Mich.: Am. Geologist, vol. 2, 1888, pp. 35-39. 



Notes the topographic features around Ann Arbor and describes certain gravel pits which are thought to exhibit 

 the structure of an ancient delta, and argues therefore that Ann Arbor is situated in a former bay covered by Lake 

 Erie. In a footnote announces the discovery of shore lines at two levels passing through Ann Arbor, the upper 

 corresponding with an outwash apron on which the university campus is built, and the lower with a valley which 

 connects Huron and Saline rivers. Both are found by Leverett's observations to be above the highest level of 

 Lake Maumee and are referable to glacial outwash and glacial drainage instead of to the shore phenomena of a lake. 

 Woostee, L. C, Karnes near Lansing, Mich.: Science, vol. 3, 1884, p. 4. 



Contains a brief discussion of the Mason esker. 

 Weight, G. F., Explorations of the glacial boundary between New Jersey and Illinois: Proc. Am. Assoc. Adv. Sci., 

 vol. 32, 1883, pp. 202-208. 



Notes the great northward reentrant in the glacial boundary in Indiana as well as other irregularities, and is 

 inclined to refer them to the combined effect of difference in level and the relation to gathering grounds of snow. 

 Announces the hypothesis of the Cincinnati ice dam. 



The glacial boundary in Ohio, Indiana, and Kentucky: Western Reserve Hist. Soc, Cleveland, 1884, 86 pp. 



Discusses in detail the drift features along the glacial boundary in the States named. 



The ice age in North America and its bearing on the antiquity of man, New York, 4th ed., with supplementary 



notes, 1896, pp. vii-xxv, 315-358. 



Discusses the Great Lakes region and makes incidental references to the glacial features and deposits of Indiana 

 and Michigan. Gives important recent contributions in the preface. 



The glacial boundary in western Pennsylvania, Ohio, Kentucky, Indiana, and Illinois: Bull. U. S. Geol. 



Survey No. 58, 1890, pp. 39-110. 



Discusses in detail the drift features along the glacial boundary in the States named; revises to some extent 

 the position of boundary given in earlier papers. 



Outlets of the Great Lakes: The Nation, vol. 55, 1892, pp. 217-219. 



Gives a popular account of the former extent of the Great Lakes; describes especially the Mattawa outlet from 

 Georgian Bay and Lake Nipissing to Ottawa River. 



■ Man and the glacial period, New York, 1892, pp. vii, 385. 



Presents many data which bear upon glacial history and the history of the Great Lakes. 



