Nugget Sandstone
Posted by: 
brwhiz
N 40° 57.334 W 109° 28.271
12T E 628664 N 4534949
This geological formation has been exposed along a stretch of US Highway 191 northwest of Dutch John, Utah.
Waymark Code: WMJ0D0
Location: Utah, United States
Date Posted: 09/04/2013
Views: 2
Northeastern Utah, north of Vernal, was laid down layer by layer many millions of years ago when inland North America was an inland sea. Over time this giant layer cake was bent upward in an east-west trending arch many miles across. This arch, called the Uinta Anticline, has been eroded to form the Uninta Mountain range plus all the other topographic features now visible in the region. Anticlines are noted for their ability to trap petrochemical fossil fuels under their impermeable layers and the Uinta Basin is noted for its wax-like oil deposits and now its vast accumulations of natural gas.
As visitors travels throughout the region they will pass through layer after layer of the sedimentary deposits that turned to rock long ago. Sometimes, as you pass from the edge of the arch toward the center, you will find yourself climbing higher to reach older rock. Come visit Utah and investigate this gigantic "layer cake" for yourself.
The Nugget Sandstone was laid down during the Triassic-Jurassic Period transition of the Mesozoic Era. Unlike many other layers in the "cake", this was deposited by sands moving in the wind to form dunes, making the layer very uneven in depth and extent.