Uplift of the Colorado Plateau has caused the Green River to entrench its meandering path into the relatively soft rocks of the Permian-age Organ Rock Shale. At Soda Springs Basin, vertical cliffs of the more-resistant White Rim Sandstone cap the Organ Rock Shale 400 feet above the river.
POPULAR POSTS & PAGES
- Glad You Asked: Ice Ages – What are they and what causes them?
- GeoSights: Crystal Peak, Millard County, Utah
- Glad You Asked: Igneous, Sedimentary, & Metamorphic Rocks
- Utah: A Geologic History
- Great Salt Lake, Lake Bonneville, & Bear Lake
- Hazards Maps
- Geologic Maps
- Glad You Asked: How Do Geologists Know How Old a Rock Is?
LEARN MORE ABOUT THE UTAH GEOLOGICAL SURVEY
The Utah Geological Survey (UGS) is a division of the Utah Department of Natural Resources. Several specialized programs comprise the UGS: Energy & Minerals, Geologic Hazards, Geologic Information & Outreach, Geologic Mapping, Groundwater & Wetlands, and Paleontology.
1594 West North Temple, Suite 3110
Salt Lake City, Utah 84116
PO BOX 146100
Salt Lake City, Utah 84114
Monday through Friday,
8 a.m. to 5 p.m.