I have been mapping the distribution of obsidian nodules in the landforms of the Cedar Mountains, where caldera remnants of volcanic tuff and glass have been incorporated into debris flows and alluvial fans the formed well before the last ice age. These ancient landforms, extending well beyond the eastern mountain front, host clasts of the Modena obsidian, a toolstone source of the eastern Escalante Basin. We continue to work on documenting and describing this resource, and I hope to share much more about it here. Today (May 2025), however, I am taking a break to drive a traverse of Hamlin Valley, north and east of our project area.
It is a long loop from my camp in Echo Canyon State Park, and I planned to meet our field team in the late afternoon. There was not a lot of time to explore, but I could get a feel for an area I had not seen much of previously. Heading toward the eastern border of Nevada, beyond the southern end of Lake Valley, I pass through the north end of the Wilson Creek Mountains and through the crunchy, old mining town of Atlanta. I follow some distant Pinyon Jays, birds I have missed closer to home for some reason, but they do not let me get close. I am left only with their laughing calls. That’ll do.
At Wells Summit in the Limestone Hills, I finally look into Hamlin Valley. I had been here before, but I was drawn north into the great wide open below the Snake Range. This time I will turn south to go the length of Hamlin. The valley is bounded by the Mountain Home Range on the east, but the extensional space of the vast valley is amazing. At the remnants of Hyde Well, the valley is over 15 miles wide, but it appears endless in the late-morning haze.
I turn south, rambling on roughly graded dirt and crossing the dry Hamlin Valley Wash, a distant tributary of the once vast, now dry, Lake Bonneville. I am now in Utah, moving along uplifted pediments built of ancient alluvial fans faulted upward to become dissected ramps of sediment, shed from the Mountain Home Range long ago. The wash and road are soon confined between toes of the relict fans extended from both sides of the valley. A Golden Eagle meets me halfway, flying low as it trolls the dissected slope overlooking the dry wash.
Once imperceptibly wide, the valley’s southern reach narrows between the White Rock Mountains (Nevada) and the Needle Range (Utah). The valley begins to close as private lands of small settlements, ranches, and homesteads confine creative travel possibilities. When you reach the southern end of the valley it literally pours into Modena Wash; the drainage divide is at the valley margin, not in the bounding hills of the Indian Peak Range. Modena Wash drops quickly through white-streaked, volcanic outcrops into the Escalante Basin.
The valley deserves more time, and I will be back to spend time among the relict fans and low-flying eagles. For the moment, I am back in the obsidian, full circle.
Keep going.
Please respect the natural and cultural resources of our public lands.