Analyzing and Mapping Natural Landscape Factors—Ozark Province 41 
sions. Fenneman’s more recent map* is essentially the same, 
except for a slight change in the northern boundary of the 
Boston Mountains. 
Lobeck brings out the relationships between rock structure 
and topography. He shows clearly the escarpments and dip 
Slopes which are the principal surface features of the asymetrical 
Ozark dome, but depicts the minor features inaccurately. For 
example, the rough country surrounding the St. Francis Moun- 
tain appears smoother than the Till Plains to the north and east 
Sauer represents the several physical factors of the environ- 
ment separately, thereby facilitating the recognition of relation- 
ships. His maps are very good considering the data available, 
bit covey only the Missouri Ozarks and involve a less detailed 
treatment of the physical landscape than might be desired. The 
map of surface features? is essentially hypsometric because of 
its large contour interval; a copy of an early Missouri geologic 
map" presents areal geology, many important relationships being 
brought out in the text; and the treatment of soils is as full as 
available reconnaissance studies would permit. Sauer’s map of 
Seographic regions’, Figure 3, results from the synthesis of 
these various factors, 
Schottenloher, the most recent writer on the Ozark Province 
as a whole, has performed an excellent piece of library research. 
but his work would have been improved by more thorough field 
study. Three maps, Abb. 15, 16, and 17, present the regional 
character of the Ozarks. Abb. 15 follows the precedent of 
8. N. M. Fenneman: Physiography of Eastern United States, 
McGraw-Hill, 1938; reference is to Plate VI. 
9. Sauer: op. cit.; reference is to map on p. 4. 
10. Sauer: op. cit.; reference is to map on p- 37. 
11. Sauer: op. cit.; reference is to map on p. 62. 
