Oil well state and county list

Regions with cataloged oil well samples in the UCMP collections:

California

• Alameda
• Butte
• Colusa
• Contra Costa
• Fresno
• Glenn
• Humboldt
• Imperial
• Kern
• Kings
• Los Angeles
• Los Angeles offshore
• Madera
• Marin
• Marin offshore
• Mendocino
• Merced
• Modoc 
• Monterey
• Napa
• Orange 
• Orange offshore
• Placer
• Riverside
• Sacramento
• San Benito
• San Bernardino
• San Diego
• San Joaquin
• San Luis Obispo
• San Mateo
• Santa Barbara
• Santa Barbara offshore
• Santa Clara
• Santa Cruz
• Santa Cruz Island
• Santa Cruz Island area
• Santa Rosa Island offshore
• Solano
• Solano offshore
• Stanislaus
• Sutter
• Tehama
• Tulare
• Ventura
• Ventura offshore
• Yolo
• Yuba

Oregon

• Columbia
• Coos
• Douglas
• Jefferson
• Multnomah

Washington

• Clallam
• Cowlitz
• Grays Harbor
• Jefferson
• King
• Lewis
• Pacific
• Wahkiakum

Wyoming

• Sublette
• Teton