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Analyzing and Mapping Natural Landscape Factors—Ozark Province 47 
The lithologic type affects weathering, erosion, the develop- 
ment or absence of Karst features, and, in various ways, the dis- 
tribution of vegetational elements. The two remaining factors, 
absolute resistance and minerals, are less important than the 
preceding ones. Absolute resistance may cause regional differ- 
énces in elevation, and minerals, although important in several 
Parts of the area, have no natural causal influences upon the 
other factors. 
On the basis of the factors just outlined, the Ozarks have 
been divided into the geologic regions shown in Figure 5. Within 
each division, the geology is either uniform or uniformly varied, 
but the geologic age need not be the same throughout. Each 
region is named for the lowest and highest or, in a few cases, 
for all stratigraphic units included. 
The following description of one region is an illustration 
of the results obtained by the analysis of the geologic factor. 
The Burlington-Boone Cap Region is that part of the Springfield 
Plateau of other writers in which the White and James rivers, 
acting on near-horizontal strata, have cut through the resistant 
Burlington-Boone limestone to expose the weaker underlying 
beds. The rocks of the region differ considerably in their sig- 
nificant characteristics. The Burlington-Boone’® “formation” 
consists of massive limestone containing a high percentage of 
chert as nodules, lenses, and beds. Upon weathering, the lime- 
Stone dissolves, leaving a deep, pervious, cherty mantle rock which 
iS more resistant than the parent limestone. Because of the 
Pervious character of the residuum, and its occurrence on hill- 
tops, subsurface drainage is rapid and the water table is low. 
In contrast to the Burlington-Boone the Jefferson City-Cotter’” 
16. The name, Burlington-Boone, is compounded Seng Neage nme 
applied to essentially the same strata in different parts of the . 
17. Jefferson City-Cotter is a formation name compounded as in 
Burlington-Boone. It is also the name of the geologic region in 
which these strata, only, are exposed. 
