Page 8 - flint1939

3.

P H Y c:: I C A L C O N n I T I O N S

RELIEF AND ELEVATIJNS

The general region is in the hills which lie between

the Ean Gabriel Mountains and the Sierra Pelona Ridge. The

entire regicn is marked by downcutting streams and youthful

topogranhy. The relief of this particular area varies from

moderate in the southern portion to extreme in the northern

portion where a 300 foot cliff and badlandf have developed.

The maximum elevation of the area is 2318 feet at the triang-

ulation marker in the east-central uart and the minimLm ele-

vati::n is about 1353 feet in Bououet Canyon in the eYtrerr:e

SOV, th'tle st.

TCPC'GRA-'HY

The topocraphy is the result of the U"'Jlift of an old,

mature land surface and its dissection. The old land surface

Plate I Old land surface in Plum Canyon