The Coast Ranges

I. Coast Ranges
1. N-NW trend--parallel Sierra Nevada
2. Extends 400 miles along the coast into Oregon
3. E-W varies from a few to 70 miles in thickness
4. North separated from Klamath Mts. by South Fork Mt. Fault Zone
5. South-butts against the E-W Trending Transverse Ranges
a. Swing eastward becoming east trending San Emigdia Range and Tehachapi Mts. (enclose the
Great Valley)
6. Geologic features that characterized coast ranges extend offshore
7. Rugged coast--steep cliffs, gently dipping sea Terraces
Tectonic vs. Eustatic change
Tectonic= when Land moves relative to Sea
Eustatic= when sea rises or falls relative to land
8. Relief
a. Highest Peaks x-6000 ft.
Big Pine Mts.--6828ft.'
Junipero Serra-- 5844 ft.
Average (2,000-4,000 ft.)
Crests are rounded--Erosional features
9. Series of ranges and valleys
a. continuous for about 110 miles
b. Mendocino Range
c. Diablo Range-west of San Joaquin Valley
d. San Francisco Bay
1. Topographic and Structural Depression
(between Berkeley Hills on east-an extension of Diablo Range and )
Santo Cruz Mt. on west
2. San Francisco Bay separates N. Coast Ranges from South Coast Ranges
3. Salinas Valley bounded by Gabilan Range on East and Santa Lucia Range on
10. Drainage NW to SE
a. Eel River--largest runoff
b. Russian River
c. NW flowing Salinas River
11. Sea Floor--narrow Shelf, shelf angle of 30 to a depth of 600 ft drops off abruptly to Deep Sea
12. West Trending Escarpment
Mendocino Escarpment (due west of Cape Mendocino)
Murray Escarpment (fracture zones off of Santa Barbara)
13. Large Submarine
Fans (Deltas-underwater)
a. Delgado Fan-North
b. Monterey Fan-South
Extend out onto deep Sea Plains
14. Submarine Canyons
a. Delgado
b. Bodega
c. Monterey
d. Sur
e. Arguello