INTERCISION TYPE OF STREAM PIRACY 439 



slowly removed chiefly by Pound River which is not only deepening its 

 valley at this point but is also advancing laterally in the direction of Cane 

 Branch bj^ undercutting the divide. Ultimately a breach will be made 

 in the divide at this point with the result that the junction of the two 

 streams ^^^ll be moved one and a quarter miles up stream and the 

 lower part of the valley of Cane Branch abandoned. 



Fig. 1. Topographic Map op a Part op the Northwest Corner op Dick- 

 enson County, Virginia, Showing Relations op Pound River to its Tribu- 

 tary, Cane Creek. 



Scale 1.318 inches = 1 mile. 



Contour interval 50 feet. 



Case II. The second example (see map, fig. 2) is at the vil'age of 

 Mt. Crawford, Rockingham County, 18 miles northeast of Staunton. 

 The rocks of the region are chiefly limestones which have been highly 

 folded and faulted. The two streams involved in this case are North 

 Fork of the Shenandoah River and one of its tributaries, Cook's Creek. 



