344 Adventures in Scenery 



Down Temescal Valley to the north the land slopes at a 

 high angle up to the foot of the eastern escarpment of the Santa 

 Ana Mountains. The escarpment is steep and highly dissected. 

 At its base low fault scarps indicate that movement along the 

 fault plane has occurred in recent time. About Corona the 

 land is extensively cultivated and planted largely to orange 

 trees. 



If it should be desired to cross the high crest of the Santa 

 Ana Mountains a highway turns west one mile south of Corona 

 and crosses the high range to Orange in the Santa Ana Valley. 

 (See Chapter XVII.) 



Santa Ana Canyon and Terraces 



Turning west at Corona the head of Santa Ana Canyon is 

 reached. Beds of Tertiary age are followed by cliffs of green- 

 ish shale interbedded with brown sandstone (Cretaceous) for 

 two miles. Terraces of gravel built by the meandering Santa 

 Ana River are crossed. A monument at the south end of the 

 bridge across the Santa Ana River marks the place where the 

 first public school in California was opened in 1867. A broad 

 sand wash of Santa Ana River extends to gravelly terraces 

 formed by the side-cutting of the river. To prevent overflow 

 of these bottom lands in times of flood an attempt has been 

 made to obviate this danger by construction of a dam at 

 Prado, near the eastern end of the canyon. 



Coyote Hills and Whittier Fault 



Fullerton is situated in the heart of the orange belt, at the 

 foot of the southern slope of the East Coyote Hills. Five miles 

 north of Fullerton East and West Coyote Hills are separated by 

 a low divide. These two low hills are anticlinal ridges of folded 

 Fernando (late Tertiary) beds. The highway crosses this low 

 divide to La Habra. Eight miles west is Whittier. Northeast 

 of the town of Whittier, at the lower end of Turnbull Canyon, 

 a section is exposed which shows the result of tilting and fold- 

 ing of the rocks due to movement along the Whittier fault 



