On one of the days we were camped near West Yellowstone, Montana, we decided to take a drive into Idaho. The high point of the drive was the Mesa Falls Recreation Area.
From Wikipedia:
Upper Mesa Falls is a waterfall on the Henrys Fork in the Caribou-Targhee National Forest. Upstream from Lower Mesa Falls, it is roughly 16 miles away from Ashton, Idaho.
Upper Mesa Falls is roughly 114 feet high and 200 feet wide.[2]
Formation
Mesa Falls Tuff, which is the rock over which Upper Mesa Falls cascades, was formed 1.3 million years ago. A cycle of rhyolitic volcanism from the Henrys Fork caldera deposited a thick layer of rock and ash across the area.[3] This layer compressed and hardened over time.
Between 200,000 and 600,000 years ago, the river eroded a wide canyon which was subsequently partly filled with basalt lava flows. The Henrys Fork of the Snake River then carved the channel through the basalt; which is the inner canyon seen today.
References and Resources:
- Upper and Lower Mesa Falls Interpretive Site – USDA Forest Service
- Henrys Fork – Wikipedia
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West Thumb Geyser Basin is situated on the shore of Yellowstone Lake’s West Thumb, a submerged volcanic caldera within the larger Yellowstone caldera. It was created about 162,000 years ago when a magma chamber bulged up under the earth’s surface, which it cracked along ring fracture zones, releasing the magma as lava. Once emptied, the chamber collapsed and, later, the caldera was filled with water, forming an extension of Yellowstone Lake.
Yellowstone References and Resources:
Ron was a member of an on-line RV forum I participated in. Retired, Ron did satellite system installs for other forum members at one price no matter how long it took.
While there, we shared supper with Ron and his wife several times in their house and once at the Black Bull Saloon and Steakhouse in Hobson. We also took in the 2007 Lewistown Chokecherry Festival and the
The town’s early history forms the basis for the storyline of the HBO TV series named