Page 12 - macneill1947

9.

For the major portion of the area, the topography

is one of early maturity. The main streams show signs of

having almost attained grade. Small meanders have been es-

tablished on the larger aggraded valley floors. The drainage

system on the uplands is perfect.

The stream in Sand Canyon is antecedent relative to

the structure in the Humphreys Station area; and subsequent

tributaries empty into both it and the Santa Clara River.

Youthful features indicate a recurrence of downoutting

aooompanying recent uplift. Q,uaternary terraces are dissected,

but are neither tilted nor offset by taults. Minor streams

are downout in narrow arroyos into their own alluvium. 1

i North of the Reynier Canyon road, just off the
mapped area, is a very interesting topographic
feature. Here a small stream flows westward
beneath a natural land bridge (See photograph
next page).