Section 261A - Central California Coast

261Aa: Suisun Hills and Valleys
261Ab: Bay Flats
261Ac: East Bay Hills - Mount Diablo
261Ad: East Bay Terraces and Alluvium
261Ae: Santa Clara Valley
261Af: Santa Cruz Mountains
261Ag: Leeward Hills
261Ah: Watsonville Plain - Salinas Valley
261Ai: San Francisco Peninsula
261Aj: North Coastal Santa Lucia Range
261Ak: South Coastal Santa Lucia Range
261Al: Santa Maria Valley
Description List

Section 261B - Southern California Coast

261Ba: Santa Ynez Hills and Valleys
261Bb: Santa Ynez - Sulphur Mountains
261Bc: Northern Channel Islands
261Bd: Oxnard Plain - Santa Paula Valley
261Be: Simi Valley - Santa Susana Mountains
261Bf: Santa Monica Mountains
261Bg: Los Angeles Plain
261Bh: Southern Channel Islands
261Bi: Coastal Hills
261Bj: Coastal Terraces
Description List

Section 262A - Great Valley

262Aa: North Valley Alluvium
262Ab: Northern Eastside Terraces
262Ac: Butte Sink - Sutter Basin
262Ad: Colusa Basin
262Ae: Sutter Buttes
262Af: River Alluvium
262Ag: Hardpan Terraces
262Ah: Yolo Alluvial Fans
262Ai: Yolo - American Basins
262Aj: Sodic Claypan Terraces
262Ak: Montezuma Hills
262Al: Delta
262Am: Delta Basins
262An: Winters Terraces
262Ao: Camanche Terraces
262Ap: Lodi Alluvium
262Aq: Westside Alluvial Fans and Terraces
262Ar: Caswell Basin
262As: Manteca - Merced Alluvium
262At: San Joaquin Basin
262Au: Granitic Alluvial Fans and Terraces
262Av: Tulare Basin
262Aw: Panoche and Cantua Fans and Basins
262Ax: Antelope Plain
262Ay: South Valley Alluvium and Basins
262Az: Elk Hills and Southern Valley Terraces
Description List

Section 263A - Northern California Coast

263Aa: Crescent City Plain
263Ab: Northern Franciscan
263Ac: San Pablo Bay Flats
263Ad: Wiregrass Ridge
263Ae: Humboldt Bay Flats and Terraces
263Af: Central Franciscan
263Ag: Coastal Franciscan
263Ah: Fort Bragg Terraces
263Ai: Point Arena
263Aj: Coastal Hills - Santa Rosa Plain
263Ak: Point Reyes
263Al: Marin Hills and Valleys
263Am: Mt. St Helena Flows and Valleys
Description List

Section M261A - Klamath Mountains

M261Aa: Western Jurassic
M261Ab: Gasquet Mountain Ultramafics
M261Ac: Oregon Mountain
M261Ad: Siskiyou Mountains
M261Ae: Scott Bar Mountain
M261Af: Lower Salmon Mountains
M261Ag: Upper Salmon Mountains
M261Ah: Scott Valley
M261Ai: Eastern Klamath Mountains
M261Aj: Upper Scott Mountains
M261Ak: Lower Scott Mountains
M261Al: Duzel Rock
M261Am: Shoemaker Bally
M261An: Red Butte
M261Ao: Windy Peak
M261Ap: Forks of Salmon
M261Aq: North Trinity Mountain
M261Ar: Trinity Mountain - Hayfork
M261As: Pelletreau Ridge
M261At: Trinity Alps
M261Au: Rattlesnake Creek
Description List

Section M261B - Northern California Coast Ranges

M261Ba: Eastern Franciscan
M261Bb: Central Franciscan
M261Bc: Stony Creek Serpentine
M261Bd: Clear Lake Hills and Valleys
M261Be: Konocti Flows
M261Bf: Ultrabasic Complex
Description List

Section M261C - Northern California Interior Coast Ranges

M261Ca: Western Foothills
M261Cb: Tehama Terraces
M261Cc: Dunnigan Hills
Description List

Section M261D - Southern Cascades

M261Da: Old Cascades
M261Db: Shasta Valley
M261Dc: Upper Shasta Valley
M261Dd: Blacks Mountain - Susanville Peak
M261De: Butte Valley
M261Df: High Cascades
M261Dg: McCloud Flat
M261Dh: Medicine Lake Lava Flows
M261Di: Medicine Lake Highlands
M261Dj: Hat Creek Rim
M261Dk: Parker Mountain Flat
M261Dl: Shingletown - Paradise
M261Dm: Lassen - Almanor
Description List

Section M261E - Sierra Nevada

M261Ea: Diamond Mountain - Crystal Peak
M261Eb: Fredonyer Butte - Grizzly Peak
M261Ec: Frenchman
M261Ed: Greenville - Graeagle
M261Ee: Bucks Lake
M261Ef: Granitic and Metamorphic Hills
M261Eg: Upper Foothills Metamorphic Belt
M261Eh: Upper Batholith and Volcanic Flows
M261Ei: Sierra Valley
M261Ej: Tahoe - Truckee
M261Ek: Glaciated Batholith and Volcanic Flows
M261El: Tahoe Valley
M261Em: Batholith and Volcanic Flows
M261En: Markleeville
M261Eo: Glaciated Batholith
M261Ep: Lower Batholith
M261Eq: Upper Batholith
M261Er: Eastern Slopes
M261Es: Tehachapi - Piute Mountains
M261Et: Carson Range
M261Eu: Kern Plateau
Description List

Section M261F - Sierra Nevada Foothills

M261Fa: Tuscan Flows
M261Fb: Lower Foothills Metamorphic Belt
M261Fc: Lower Granitic Foothills
M261Fd: Southern Granitic Foothills
M261Fe: San Emigdio Mountains
Description List

Section M261G - Modoc Plateau

M261Ga: Lower Klamath - Tule Lake Basins
M261Gb: Devil's Garden
M261Gc: Crowder Flat
M261Gd: Mowitz Buttes
M261Ge: Goose Lake Basin
M261Gf: Warner Mountains
M261Gg: Pit River Valley
M261Gh: Likely Tableland
M261Gi: Likely Mountain
M261Gj: Bald Mountain - Dixie Valley
M261Gk: Horsehead Mountain
M261Gl: Adin Mountains and Valleys
M261Gm: Eagle Lake - Observation Peak
M261Gn: Big Valley Mountains
M261Go: Big Valley
M261Gp: Fall River Valley
Description List

Section M262A - Central California Coast Ranges

M262Aa: Fremont - Livermore Hills and Valleys
M262Ab: Western Diablo Range
M262Ac: Diablo Range
M262Ad: Eastern Hills
M262Ae: Interior Santa Lucia Range
M262Af: Gabilan Range
M262Ag: Kettleman Hills and Valleys
M262Ah: Paso Robles Hills and Valleys
M262Ai: Carrizo Plain
M262Aj: Caliente Range - Cuyama Valley
M262Ak: Temblor Range
Description List

Section M262B - Southern California Mountains and Valleys

M262Ba: San Rafael - Topatopa Mountains
M262Bb: Northern Transverse Ranges
M262Bc: Sierra Pelona - Mint Canyon
M262Bd: San Gabriel Mountains
M262Be: Upper San Gabriel Mountains
M262Bf: Santa Ana Mountains
M262Bg: San Gorgonio Mountains
M262Bh: Upper San Gorgonio Mountains
M262Bi: Little San Bernardino - Bighorn Mountains
M262Bj: Fontana Plain - Calimesa Terraces
M262Bk: Perris Valley and Hills
M262Bl: San Jacinto Foothills - Cahuilla Mountains
M262Bm: San Jacinto Mountains
M262Bn: Western Granitic Foothills
M262Bo: Palomar - Cuyamaca Peak
M262Bp: Desert Slopes
Description List

Section 322A - Mojave Desert

322Aa: Owens Valley
322Ab: Death Valley
322Ac: Amargosa Desert - Pahrump Valley
322Ad: Funeral Mountains - Greenwater Valley
322Ae: Panamint Valley
322Af: Searles Valley - Owlshead Mountains
322Ag: High Desert Plains and Hills
322Ah: Mojave Valley - Granite Mountains
322Ai: Silurian Valley - Devil's Playground
322Aj: Kingston Range - Valley Wells
322Ak: Ivanpah Valley
322Al: Providence Mountains - Lanfair Valley
322Am: Piute Valley - Sacramento Mountains
322An: Lucerne - Johnson Valleys and Hills
322Ao: Bullion Mountains - Bristol Lake
322Ap: Pinto Basin and Mountains
Description List

Section 322B - Sonoran Desert

322Ba: Cadiz - Vidal Valleys
322Bb: Palen - Riverside Mountains
322Bc: Chuckawalla Valley
322Bd: Palo Verde Valley and Mesa
322Be: Chocolate Mountains and Valleys
Description List

Section 322C - Colorado Desert

322Ca: Coachella Valley
322Cb: Borrego Valley - West Mesa
322Cc: Imperial Valley
322Cd: East Mesa - Sand Hills
Description List

Section 341D - Mono

341Da: Carson Valley - Truckee Meadows
341Db: Pine Nut Mountains
341Dc: Antelope - Mason Valley and Hills
341Dd: Sweetwater Mountains - Pine Grove Hills
341De: Bodie Hills - Excelsior Mountains
341Df: Mono Valley
341Dg: Wassuck Range
341Dh: Crowley Flowlands
341Di: Benton - Upper Owens Valleys
341Dj: White Mountains
341Dk: Fort Sage Mountains - Lemmon Valley
341Dl: Glass Mountain
341Dm: Virginia - Pah Rah Ranges
Description List

Section 341F - Southeastern Great Basin

341Fa: Silver Peak Mountains - Fish Lake Valley
341Fb: Inyo Mountains
341Fc: Saline Valley - Cottonwood Mountains
341Fd: Grapevine Mountains
341Fe: Cosa - Argus Ranges
341Ff: Panamint Range
Description List

Section 342B - Northwestern Basin and Range

342Ba: Surprise Valley
342Bb: Sheldon Range
342Bc: Honey Lake Basin
342Bd: Cottonwood - Skedaddle Mountains
342Be: Madeline Plains
Description List