| Fumarole at Sulphur Works - 1976 |
|
Fumarole at Sulphur Works - 1976
|
| Fumarole at Sulphur Works - 1976 |
| Roadcut near Lassen Peak - 1976 |
| Brokeoff Mountain
- 1976 |
| Lassen Peak Trail,
dacite towers - 1976 |
| Lassen Peak summit
blast crater, Mt. Shasta view - 1976 |
| Lassen Peak summit,
1915 dacite flow - 1976 |
| Lassen Peak summit
- 1976 |
| Lassen Peak summit,
1915 Hat Creek Mud Flow - 1976 |
| Lassen Peak summit,
1915 Hat Creek Mud Flow - 1989 |
| Lassen Peak summit
area - 1976 |
| Helen Lake from
Lassen Peak trail - 1976 |
| Chaos Crags - 1989 |
| Lassen Peak from
Cinder Cone - 1976 |
| Cinders over basalt
flow, from Cinder Cone - 1976 |
| Basalt flow near
Snag Lake, from Cinder Cone - 1976 |
| Cinder Cone summit
crater - 1976 |
| Scoria at Cinder
Cone summit crater - 1976 |
| Basalt flow at
base of Cinder Cone - 1976 |
| Ice cave at base
of Cinder Cone - 1976 |
| Volcanic bombs
at base of Cinder Cone - 1976 |
| Volcanic bomb at
base of Cinder Cone - 1976 |
| Cinder Cone - 1976 |
| Burney Falls -
1989 |
| Pillow basalts
and diatomaceous earth, near Lake Britton - 1989 |
| Mt. Shasta, from
vista near Medicine Lake - 1989 |
| Little Glass Mountain
- 1989 |
| Medicine Lake Highlands
from Modoc Plateau - 1989 |
| Spherulitic obsidian,
Cougar Butte - 1976 |
| Cinder cone, Modoc
Plateau - 1989 |
| Lava tube entrance,
Modoc Plateau - 1989 |
| Shrub, Modoc Plateau
- 1989 |
| Flower, Modoc Plateau
- 1989 |
| Hornito, Modoc
Plateau - 1976 |
| Modoc Plateau landscape
- 1989 |
| Modoc Plateau landscape
- 1976 |
| Sunrise over Modoc
Plateau - 1976 |
| Native American
petroglyphs, Modoc Plateau - 1976 |
| Cliff with Native
American petroglyphs, Modoc Plateau - 1976 |
| Coyote, Lava Beds
National Monument - 1976 |