REVIEWS 9 J 9 



dispute. One does not always see how the author has been guided in 



the selection of papers by foreign writers. From the list of over one 



hundred titles of papers published by Smith Woodward prior to 1900, 



sixty-nine are recorded. We can only be thankful that so many are 



given. 



The geological survey is to be congratulated upon the publication 



of the work ; but we cannot help wishing that the printer had left the 



leaves untrimmed. 



S. W. W. 



Evolution of the Northern Part of the Loivlands of Southeastern 

 Missouri. By Professor C. F. Marbut. The U?iiversity of 

 Missouri Studies, Vol. I, No. 3 (Columbia), July, 1902. viii 

 + 63 pages; plates I-VII. 

 The paper is of more than usual interest to physiographers in that 

 it presents in a comprehensive way the history of an extremely inter- 

 esting locality. It is divided into Parts I and II, the former treating 

 of the geography and geology of the region, and the latter of its 

 physiographic development. 



The writer abandons his former ideas of the origin of Crowley's 

 Ridge, 1 and agrees, in the main, with the views of Dr. Branner, pub- 

 lished several years ago, while state geologist of Arkansas. 2 It is 

 shown that the lowland north and west of Crowley's and Benton 

 Ridges, which is spoken of in the paper as the Advance lowland, was 

 formed by the Mississippi at a time when it turned westward at the 

 present site of Cape Girardeau and flowed past Delta, Poplar Bluff, 

 and Neelysville, Mo., and Pocahontas, Powhattan, and Newport, Ark. 

 While the Mississippi was forming the Advance lowland, the Ohio was 

 eroding the broad valley between the eastern edge of Crowley's Ridge 

 and the uplands of western Tennessee, and which the author calls the 

 Cairo lowland. 



While the Mississippi is the larger of the two streams, it has twice 

 been captured by the Ohio. The capture of the larger stream by the 

 smaller was made possible by the latter having the lower flood plain. 

 The first capture was effected by a small tributary of the Ohio, working 

 its way headward, through what was then a continuous ridge separating 

 the two great rivers, along or near the present course of Little River; 

 the second, by another small tributary working its way northward from 



1 Proc. Bos. Soc. Nat. Hist., Vol. XXVI (1895), pp. 479-88. 



2 Ann. Rep. Geol. Sur. Ark., Vol. II (1889), preface, p. xiv. 



