1. California Geography Geomorphic Regions of California

2. Geomorphic Regions of California

8. Klamath Mountains Southern Cascades Modoc Plateau Northern Coast Ranges Central Coast Ranges Sierra Nevada Central Valley Sacramento Valley San Joaquin Valley GEOMORPHIC REGIONS

9. Basin & Range LA. Basin The Mojave Desert Peninsular Range The Salton Sink (Colorado Desert) GEOMORPHIC REGIONS

10. Basin & Range LA. Basin The Mojave Desert Peninsular Range The Salton Sink (Colorado Desert) GEOMORPHIC REGIONS

12. California’s Geomorphic Regions • Northwestern CA & the Klamath Mountains • coastal influences • mild temperature • precipitation is rain with some snow • rapid runoff rather than spring snow melt • swift rivers, faster erosion than any other region

14. California’s Geomorphic Regions • Klamath Mountains • Location: • located west of volcanic Cascade Range • extends into Oregon & south to Great Valley • Pacific border province • Mountains • elevation 5-7000 feet with Trinities over 8900 feet • Trinity Alps were glaciated • individual ranges • South Fork, Trinity Mts., Trinity Alps, Scott Mts. Siskiyous Mts. & Salmon Mts.

15. California’s Geomorphic Regions • Klamath Mountains • Geomorphology • complex region including Paleolithic & Mesolithic granitic & metamorphic rocks • a continuation of the Sierra Nevada • intrusive igneous granitic rock was uplifted • contains abundant marine fossils

16. California’s Geomorphic Regions • Klamath Mountains • Fluvial Features • Rivers • Klamath River which runs 150 miles through northern part of region • Southern part of region drained by Trinity River • Lakes • glacial tarns in Trinity Alps • man made Trinity lake on Trinity River

17. California’s Geomorphic Regions • Klamath Mountains • Special Features • Castle Crag • an uplifted intrusive igneous granite formation

20. Klamath Mountains Southern Cascades Modoc Plateau Northern Coast Ranges Central Coast Ranges Sierra Nevada Central Valley Sacramento Valley San Joaquin Valley GEOMORPHIC REGIONS

21. California’s Geomorphic Regions • Southern Cascade Range • extrusive igneous • volcanic landforms • Volcanoes, plug domes, cinder cones • inland with greater temperature extremes • precipitation is rain with some snow & glaciation on Mt. Shasta • rivers runoff from Mt. Shasta • less erosion due to weatherresistant volcanic rocks

39. California’s Geomorphic Regions • Southern Cascade Range • Location: • located between Klamath Range & volcanic Modoc Plateau • Cascade range extends into Oregon, Washington & Canada and south to Great Valley • Mountains • Mt. Shasta • Lassen Peak • Sutter Buttes

40. California’s Geomorphic Regions • Southern Cascades • Geology • volcanic region of igneous rocks including andesite, ryolite, & basalt • very young geologic region (1-10 million years) • covers over former granitic range

41. California’s Geomorphic Regions • Southern Cascade Ranges • Fluvial Features • Rivers • Klamath River flows north into Oregon • Sacramento, McCloud headwaters also start at Mt. Shasta and flow southward into the Great Valley • Lakes • Mt. Shasta Lake ( man made at the confluence of the Sacramento, Pit and McCloud rivers)

45. California’s Geomorphic Regions • Southern Cascade Range • Special Features • Strato- Volcano • Mt. Shasta 14,162 ft. • Plug Dome • Lassen Peak 10,457 ft.

46. Klamath Mountains Southern Cascades Modoc Plateau Northern Coast Ranges Central Coast Ranges Sierra Nevada Central Valley Sacramento Valley San Joaquin Valley GEOMORPHIC REGIONS

47. Basin & Range LA. Basin The Mojave Desert Peninsular Range The Salton Sink (Colorado Desert) GEOMORPHIC REGIONS

49. California’s Geomorphic Regions • Modoc Plateau • lava plateau • extrusive igneous • fissure flows • basaltic plateaus • inland with greater temperature extremes • precipitation is very sparse • considered a desert

50. California’s Geomorphic Regions • Modoc Plateau • little surface water or rivers - lots of underground water transfer in tubes • less erosion due to weather resistant volcanic rocks