Lawrence County is a county in the U.S. state of South Dakota. As of the 2020 census, the population was 25,768. Its county seat is Deadwood.
Spearfish is a city in Lawrence County, South Dakota. The population was 12,193 at the time of the 2020 census, making it the 10th most populous city in South Dakota.
The geology of the Grand Canyon area includes one of the most complete and studied sequences of rock on Earth. The nearly 40 major sedimentary rock layers exposed in the Grand Canyon and in the Grand Canyon National Park area range in age from about 200 million to nearly 2 billion years old. Most were deposited in warm, shallow seas and near ancient, long-gone sea shores in western North America. Both marine and terrestrial sediments are represented, including lithified sand dunes from an extinct desert. There are at least 14 known unconformities in the geologic record found in the Grand Canyon.
The geology of the Zion and Kolob canyons area includes nine known exposed formations, all visible in Zion National Park in the U.S. state of Utah. Together, these formations represent about 150 million years of mostly Mesozoic-aged sedimentation in that part of North America. Part of a super-sequence of rock units called the Grand Staircase, the formations exposed in the Zion and Kolob area were deposited in several different environments that range from the warm shallow seas of the Kaibab and Moenkopi formations, streams and lakes of the Chinle, Moenave, and Kayenta formations to the large deserts of the Navajo and Temple Cap formations and dry near shore environments of the Carmel Formation.
The geology of the Grand Teton area consists of some of the oldest rocks and one of the youngest mountain ranges in North America. The Teton Range, partly located in Grand Teton National Park, started to grow some 9 million years ago. An older feature, Jackson Hole, is a basin that sits aside the range.
The exposed geology of the Capitol Reef area presents a record of mostly Mesozoic-aged sedimentation in an area of North America in and around Capitol Reef National Park, on the Colorado Plateau in southeastern Utah.
Logan Canyon is a canyon in the western United States in northeastern Utah, which cuts its way through the Bear River Mountains, a branch of the Wasatch Range. It is popular for both summer and winter activities, especially rock-climbing, hiking, camping, fishing, snowmobiling, and skiing, at the Beaver Mountain ski resort. The canyon rises to an elevation of approximately 7,800 feet (2,400 m) above sea level, after a vertical climb of about 2,900 feet (880 m). Just beyond the summit is a steep road leading into Bear Lake Valley and scenic overlooks that provide views of deep blue Bear Lake. The western terminus is at Logan in Cache County and the eastern terminus is at Garden City in Rich County.
The Spring Mountains National Recreation Area (SMNRA) is a U.S. national recreation area, administered by the U.S. Forest Service, west of Las Vegas, Nevada. It covers over 316,000 acres. The area runs from low meadows, to the 11,918-foot (3,633 m) Mount Charleston. The SMNRA is a part of the Humboldt-Toiyabe National Forest. It adjoins the Red Rock Canyon National Conservation Area, which is administered by the Bureau of Land Management.
The Loess Hills are a formation of wind-deposited loess soil in the westernmost parts of Iowa and Missouri, and the easternmost parts of Nebraska and Kansas, along the Missouri River.
Black Hills National Forest is located in southwestern South Dakota and northeastern Wyoming, United States. The forest has an area of over 1.25 million acres (5,066 km2) and is managed by the Forest Service. Forest headquarters are located in Custer, South Dakota. There are local ranger district offices in Custer, Rapid City, and Spearfish in South Dakota, and in Sundance, Wyoming.
The Mount Evans Scenic Byway is a 49-mile (79 km) National Forest Scenic Byway and Colorado Scenic and Historic Byway located in Clear Creek and Jefferson counties, Colorado, United States. The byway ascends to 14,140 feet (4,310 m) of elevation near the 14,271-foot (4,350 m) summit of Mount Evans, making it the highest paved road in North America The byway visits Echo Lake Park, the Mount Goliath Natural Area, the Dos Chappell Nature Center, and Summit Lake Park on its way to the summit. A fee is charged to travel State Highway 5 to the summit and vehicles over 30 feet (9.1 m) long are not allowed, although they are allowed on State Highway 103 which reaches its highest elevation of 11,020 feet (3,359 m) at Juniper Pass.
The Black Hills is an isolated mountain range rising from the Great Plains of North America in western South Dakota and extending into Wyoming, United States. Black Elk Peak, which rises to 7,244 feet (2,208 m), is the range's highest summit. The Black Hills encompass the Black Hills National Forest. The name of the hills in Lakota is Pahá Sápa. The Black Hills are considered a holy site. The hills are so called because of their dark appearance from a distance, as they are covered in evergreen trees.
State Route 143 (SR-143) is a state highway in the U.S. state of Utah. The entire highway has been designated the Brian Head-Panguitch Lake Scenic Byway as part of the Utah Scenic Byways program. This road has also been designated as Utah's Patchwork Parkway as part of the National Forest Scenic Byway and National Scenic Byway programs.
At least 14 special routes of U.S. Route 14 (US 14) have existed.
The Peak to Peak Scenic Byway is a 55-mile (89 km) National Forest Scenic Byway and Colorado Scenic and Historic Byway located in Gilpin, Boulder, Larimer counties, Colorado, USA. The Peak to Peak Highway was originally built in 1918 and provides views of the Front Range mountains in the Colorado Rocky Mountains. It was Colorado's first scenic highway. The Central City/Black Hawk Historic District is a National Historic Landmark.
Roughlock Falls Nature Area is a nature area in Lawrence County, South Dakota in the United States. It is located in Spearfish Canyon, near Little Spearfish Creek, just before the creek joins Spearfish Creek, within the Black Hills National Forest. The area is managed by the South Dakota Department of Game, Fish, and Parks. Birdwatching, fishing, hiking, and snowmobiling are popular activities within this area. The area is about 15 miles (24 km) southwest of Spearfish or about 14.5 miles (23.3 km) west of Lead, just west of Spearfish Canyon Scenic Byway.
The geology of South Dakota began to form more than 2.5 billion years ago in the Archean eon of the Precambrian. Igneous crystalline basement rock continued to emplace through the Proterozoic, interspersed with sediments and volcanic materials. Large limestone and shale deposits formed during the Paleozoic, during prevalent shallow marine conditions, followed by red beds during terrestrial conditions in the Triassic. The Western Interior Seaway flooded the region, creating vast shale, chalk and coal beds in the Cretaceous as the Laramide orogeny began to form the Rocky Mountains. The Black Hills were uplifted in the early Cenozoic, followed by long-running periods of erosion, sediment deposition and volcanic ash fall, forming the Badlands and storing marine and mammal fossils. Much of the state's landscape was reworked during several phases of glaciation in the Pleistocene. South Dakota has extensive mineral resources in the Black Hills and some oil and gas extraction in the Williston Basin. The Homestake Mine, active until 2002, was a major gold mine that reached up to 8000 feet underground and is now used for dark matter and neutrino research.
The geology of North Dakota includes thick sequences oil and coal bearing sedimentary rocks formed in shallow seas in the Paleozoic and Mesozoic, as well as terrestrial deposits from the Cenozoic on top of ancient Precambrian crystalline basement rocks. The state has extensive oil and gas, sand and gravel, coal, groundwater and other natural resources.
