Collection place
- CA-Mod-197, Modoc County, California264 objects
- Calaveras County, California261 objects
- CA-Pla-5 or 6, Placer County, California250 objects
- CA-Las-194, Surprise Valley, Lassen County229 objects
- Lower Klamath Lake Area, Siskiyou County, California204 objects
- Lower Klamath Lake, Siskiyou County, California204 objects
- Lava fields, Siskiyou County, California200 objects
- Honey Lake Valley, Lassen County, California191 objects
- Tuolumne County, California188 objects
- Shasta County, California176 objects
- Madeline Plains, Lassen County, California145 objects
- CA-Cal-142, Calaveras County, California115 objects
- CA-Sis-7, Lava fields, Siskiyou County102 objects
- Canby's Cross, Lava fields, Siskiyou County102 objects
- CA-Mod-27, Modoc County, California100 objects
- CA-Pla-5, Placer County, California92 objects
- Honey Lake, Lassen County, California87 objects
- Prosser Creek area, Nevada County, California82 objects
- CA-Sis-223, Lower Klamath Lake, Siskiyou County75 objects
- Fall River Valley, Shasta County, California75 objects