I came across an interesting to me, geological processes that led to the development of the Grabens that began approximately 300 million years ago. Over time various geological changes came into play until finally about 55,000 years ago the ingredients were in place and the Grabens began to form. The Grabens are in the Canyonlands National Park in Utah.
https://www.nps.gov/articles/cany-grabens.htm
https://www.nps.gov/articles/cany-grabens.htm