Kane County, with its 4105 square miles, lies along the south-central margin of Utah and is found in the western part of the Colorado Plateaus physiographic province. It is famous for scenic beauty displayed in its colorful rock formations and other geologic features such as faults, folds, arches, monoclines, joints, cross beds, cliffs, lava fields, and canyons. Kane County contains parts of Bryce and Zion National Parks, the Glen Canyon Recreation Area, and it is home to the Coral Pink Sand Dunes and Kodachrome Basin State Parks. The county area has had an interesting geologic history and important fossil finds have added much to our knowledge of world geology. The total value of the mineral production of Kane County, Utah through 1985 is estimated at $21,854,000, of which more than 95 percent is attributed to construction materials, mined or quarried to build and maintain highways. Sand and gravel, crushed stone, coal, gemstones, pumice and volcanic ash, manganese ore, gold, uranium, silver, copper and lead were or have been produced, with the most important current commodities being construction and gem materials. The annual rate of production of these items is erratic, but the value averages a few hundred thousand dollars annually. The production of the construction materials is dependent on the schedules of the Utah Department of Transportation and other road building agencies. Gem materials are mined intermittently to supply the tourist trade. Currently, there are no large, regularly producing mining operations in the county. Other mineral deposits reported in Kane County include titanium and zirconium, gypsum and anhydrite, limestone and dolomite, clay, and vanadium. About 29 tests for petroleum have thus far been drilled without significant success. However, many had interesting shows of oil and gas and the potential for discovery remains high. 192 pages + 10 plates

This bulletin serves not only to introduce the non-geologist to the rich geology of Millard County, but also to provide professional geologists with technical information on the stratigraphy, paleontology, and structural geology of the county. Millard County is unique among Utah’s counties in that it contains an exceptionally complete billion-year geologic record. This happened because until about 200 million years ago the area of present-day Millard County lay near sea level and was awash in shallow marine waters on a continental shelf upon which a stack of fossil-bearing strata more than 6 miles (10 km) thick slowly accumulated. This bulletin summarizes what is known about these strata, as well as younger rocks and surficial deposits in the county, and provides references to scientific papers that describe them in greater detail. Mountains North 30 x 60 (1:100,000-scale) quadrangles. These companion maps and this bulletin portray the geology of Millard County more completely and accurately than any previously published work.

General geology papers and road logs for the Millenium Field Conference in Utah.