Looking Across the Watershed
The 40 mile landscape across two drainages from this viewpoint this early summer. The Trees are in the Little Powder River Valley. Beyond the far ridge is the Powder River Valley. It’s like Yellowstone over there without the tourists and the exotic wildlife. All of this is grass and cattle county.
All this ground is eroded on top of a network of Tertiary Alluvial Fans. These are large aprons of sediment spreading across the land eastward from the Big Horn Mountain Range. It eroded spreading sediment out many miles in each direction. These sediments actually filing the greater geologic feature, the “Powder River Basin”. It was a sedimentary bathtub/down warp to be filled up before the aluvial fans could spread from the uplift. Those Big Horns were relatively taller in the past with the valley next to them much lower. That by the way is why the coal swamps formed there. They were formed on the low ground next to high mountains.
The sediments exposed in this image are mostly alternating of beds of Sand/Silt and Clay this 120 mile distance to the source. Over time the more recent rivers have cut down across the older beds between here and the distant mountains.
I’m not usually at tree level down in the river valley floor but this was a rare trip to the highway. Those travels cross part of this a little lower is the drainage.
I’m normally 10 miles off the right frame where I live about 400 feet higher in elevation than this “low” country. Across the river valley, the Mountains are in Montana. I am standing in Wyoming by at least a mile looking this direction. Most of my images have both states in them. Sky of one, ground of the other or both lol. I consider 5 miles either side of the border as the mythical land called “Wyotana”. Added together the 10 linear miles over the length of the Montana / Wyoming border would be 3700 square miles or 3 times the size of Rhode Island. I suspect the population of Wyotana is a thousand at the most.
Location: Bliss Dinosaur Ranch, Wyoming/Montana borderlands (Wyotana)
Title: Looking Across the Watershed
