Milford Crater is about twenty five miles in Diameter.

Milford Utah is just a few miles southeast of the center of this eroded impact crater. The western rim is known as the San Francisco Mountains, the eastern rim is known as the Mineral Mountains. The material in the center of the crater slid north north-east to form the Pavant Thrust Fault. The Cricket Mountains to the north-north east is part of the ejecta blanket. The impact is probably the source for the obsidian in the Black Rock Desert, and the material on Sunstone Knoll south of Delta Utah. The meteorite provided the valuable minerals mined in the area, and the heat that is presently being tapped for power generation. Beneath the crater is a large granite pluton formed by the heat of the impact. Geologists have dated this to eight million years ago, but other dating places it is recent as one million years ago.

MY HOME PAGE IMPACT CRATERS IMPACT SITES: AYER'S ROCK CROSBY CRATER MILFORD CRATER UPHEAVAL CRATER IMPACT GEOLOGY: SILICA INFORMATION GEODES IMPCONS MOQUI MARBLES

Impact melt ejected to the north was heated to the boiling point allowing the silica to form lussitite spherical needle structures in "Snow Flake Obsidian." The melt that flowed down Mineral Mountain above [east of] Roosevelt Hot Springs developed flow planes that brought lussitite crystals together, allowing them to build larger and larger spherical structures by recrystalizing as new radial layers on the exterior of the larger spheres. As the obsidian solidified, the lussitite was transformed to denser crystobalite [stuck to the solidifying obsidian, it had to shrink so it pulled away from the center taking the central concentric spheres with the largest plate] forming hollow geodes.