372 



EARTH FEATURES AND THEIR MEANING 



FIG. 395. "Biscuit cutting" effect of glacial sculpture in the Uinta Mountains of 

 Wyoming (after Atwood). 



part of its outline which represents the head of the valley (Fig. 



398, p. 364). As the territory of the upland is still further invested 



by the cirques, their nourish- 

 ment becomes still more irreg- 

 ular, and the circular outline 

 gives place to a scalloped 

 border, as the amphitheater 

 becomes differentiated into 

 subordinate smaller cirques, 

 each of which corresponds to a 

 scallop of the outline (Fig. 398 

 and Fig. 394). 



Grooved and fretted up- 

 lands. The partial invest- 

 ment by cirques of a mountain 

 upland yields a type of topog- 

 raphy quite unlike that pro- 

 duced by any other geological 

 process. The irregularly con- 

 nected remnants of the inher- 

 ited upland resemble nothing 

 so much as a layer of dough 

 from which biscuits have been 



FIG. 396. Two intersecting inverted 

 cones representing glacial cirques of dif- 

 ferent sizes, to show that their intersec- 

 tion is the arc of a hyperbola, the curve 

 to which the col approximates. 



cut (Fig. 395) . The surface as 

 a whole, furrowed as it is below 



