Analyzing and Mapping Natural Landscape Factors—Ozark Province 43 
Marbut!? in basing regional distinctions upon dip slopes and 
€sCarpments, This map shares with Marbut's the defect of group- 
ing together in one region rock types having distinctly dissimilar 
topographic, vegetational, and cultural expressions. A case in 
point is the inclusion in the Potosi Stufenkérper (Salem Plateau) 
of both the relatively non-cherty Jefferson City-Cotter dolomite 
and the formations from Potosi through Roubidoux which yield 
heavy resistant siliceous residuum. A comparison of Figures 5, 
7, 8, 9, and 10 will indicate the undesirability of such a grouping. 
Abb. 16 shows local relief and delineates physiographic regions. 
However, the relief is stated in general terms and boundaries are 
extremely indefinite. The physiographic regions are essentially 
the ones generally recognized, but some with common character- 
istics are subdivided on the basis of drainage basins, a criteriop 
of doubtful value. Abb. 17 presents the human activities of the 
various parts of the province. 
PRESENT WORK 
For purposes of study, the natural environment was analyzed 
into the usual aspects of geology, climate, physiography, soil, 
and native vegetation. Of these factors, two, climate and soil, 
are not treated separately. Climate is important only as it in- 
fluences the general character of the topography and vegetation ; 
it cannot be a basis of regional differentiation, because of its 
comparative uniformity throughout the Province. Soil, although 
important, is treated with geology, because of its close relation- 
ship to that factor and because of the paucity of suitable basic 
information. The other factors, geology, physiography, and 
native vegetation, are studied in detail, and regions based upon 
ther: have been established. A sample region of each type is 
here described ; in every case the area chosen is essentially the 
same. 
12, Curtis F. Marbut: Surface Features of Missouri, Missouri oe 
Surv. Rept., Vol. 10, 1st Ser., 1896, pp. 14-109; reference is to Plate 2. 
