Etymology | Howard Stansbury |
---|---|
Geography | |
Location | Great Salt Lake |
Coordinates | 40°49′47″N112°29′52″W / 40.82972°N 112.49778°W Coordinates: 40°49′47″N112°29′52″W / 40.82972°N 112.49778°W |
Highest elevation | 6,647 ft (2026 m) |
Administration | |
United States | |
State | Utah |
Stansbury Island is the second largest island within the Great Salt Lake in the U.S. state of Utah. Located in Tooele County, it is considered an island even though a dirt causeway connects it to the mainland. Stansbury Island was named after Howard Stansbury, the leader of a government expedition that surveyed the lake in 1849. [1]
A biking trail is located on the island. Petroglyphs and two caves large enough to explore are also located on the island. Its peak is Castle Rock, at 6647 feet above sea level. Camping is permitted in most areas. [2]
Stansbury Island is longitudinally aligned and is approximately 11.5 miles (18.5 km) long, 4.5 miles (7.2 km) wide, and 22,314 acres (90.30 km2) in area. [3] The island is a desert mountain/mountain range, with a few fresh water seeps along the eastern side. The western side lacks water. The island is uninhabited and is used as a winter feeding ground for sheep. Average annual precipitation is approximately six inches.
The rocks on the island are mostly early Paleozoic in age. Precambrian strata are present at the north tip and along a portion of the northeast shore. The quartzite ledge on the southern part of the island is Devonian in age. The remaining northern third of the island dates back to the Cambrian Period, consisting of a small outcrop of Tintic Quartzite, but mainly middle Cambrian limestone, shale, and dolomite. The rest of the island is composed of Upper Cambrian to Upper Mississippian strata, mostly limestone, dolomite, quartzite, and shale.
The southern half of the island was folded into a southward anticline. The northern half of the island is composed of a series of northwesterly trending fault blocks in which the strata dip to the west. The faults in the north section are transverse and may have some strike–slip component. [4]
Claret Cup cacti grow in abundance on the island, which forms the northern limit of their natural range. [5] Unusually large juniper trees were noted by Howard Stansbury in his 1850 survey of the island. [6]
The Great Salt Lake is the largest saltwater lake in the Western Hemisphere and the eighth-largest terminal lake in the world. It lies in the northern part of the U.S. state of Utah and has a substantial impact upon the local climate, particularly through lake-effect snow. It is a remnant of Lake Bonneville, a prehistoric body of water that covered much of western Utah.
Tooele is a city in Tooele County in the U.S. state of Utah. The population was 35,742 at the 2020 census. It is the county seat of Tooele County. Located approximately 30 minutes southwest of Salt Lake City, Tooele is known for Tooele Army Depot, for its views of the nearby Oquirrh Mountains and the Great Salt Lake.
The Llano Uplift is a geologically ancient, low geologic dome that is about 90 miles (140 km) in diameter and located mostly in Llano, Mason, San Saba, Gillespie, and Blanco counties, Texas. It consists of an island-like exposure of Precambrian igneous and metamorphic rocks surrounded by outcrops of Paleozoic and Cretaceous sedimentary strata. At their widest, the exposed Precambrian rocks extend about 65 miles (105 km) westward from the valley of the Colorado River and beneath a broad, gentle topographic basin drained by the Llano River. The subdued topographic basin is underlain by Precambrian rocks and bordered by a discontinuous rim of flat-topped hills. These hills are the dissected edge of the Edwards Plateau, which consist of overlying Cretaceous sedimentary strata. Within this basin and along its margin are down-faulted blocks and erosional remnants of Paleozoic strata which form prominent hills.
The Wasatch Range or Wasatch Mountains is a mountain range in the western United States that runs about 160 miles (260 km) from the Utah-Idaho border south to central Utah. It is the western edge of the greater Rocky Mountains, and the eastern edge of the Great Basin region. The northern extension of the Wasatch Range, the Bear River Mountains, extends just into Idaho, constituting all of the Wasatch Range in that state.
The Uinta Mountains are an east-west trending chain of mountains in northeastern Utah extending slightly into southern Wyoming in the United States. As a subrange of the Rocky Mountains, they are unusual for being the highest range in the contiguous United States running east to west, and lie approximately 100 miles (160 km) east of Salt Lake City. The range has peaks ranging from 11,000 to 13,528 feet, with the highest point being Kings Peak, also the highest point in Utah. The Mirror Lake Highway crosses the western half of the Uintas on its way to Wyoming.
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.
Castle Mountain is a mountain located within Banff National Park in the Canadian Rockies, approximately halfway between Banff and Lake Louise. It is the easternmost mountain of the Main Ranges in the Bow Valley and sits astride the Castle Mountain Fault which has thrust older sedimentary and metamorphic rocks forming the upper part of the mountain over the younger rocks forming its base. The mountain's castellated, or castle-like, appearance is a result of erosive processes acting at different rates on the peak's alternating layers of softer shale and harder limestone, dolomite and quartzite.
The Laramie Plains is an arid highland at an elevation of approx. 8,000 feet (2,400 m) in south central Wyoming in the United States. The plains extend along the upper basin of the Laramie River on the east side of the Medicine Bow Range. The city of Laramie is the largest community in the valley. The plains are separated from the Great Plains to the east by the Laramie Mountains, a spur of the Front Range that extends northward from Larimer County, Colorado west of Cheyenne. The high altitude of the region makes for a cold climate and a relatively short growing season. Unsuitable to most cultivation, the plains have historically been used for livestock raising, primarily of sheep and cattle.
The Deseret Peak Wilderness is located in the Stansbury Mountains of Tooele County, Utah, United States near the towns of Tooele and Grantsville, not far from the Great Salt Lake. It is part of the Wasatch-Cache National Forest. This semi-arid wilderness is part of the Great Basin ecosystem. Elevations range from about 6,000 feet to the top of Deseret Peak's limestone escarpment at 11,031 feet (3,362 m). In this high country, with barren Skull Valley to the west, you'll find some springs and intermittent creeks, despite the general dryness of the area.
The Promontory Mountains are a range in Box Elder County, Utah. The range is oriented north–south and has a length of about 35 miles (56 km). The southern portion forms a cape extending 20 miles (32 km) south into the Great Salt Lake. The First Transcontinental Railroad was completed with the Golden Spike just north of the range at Promontory Summit in the Utah Territory. Today, trains cross the Promontory Point at the southern tip of the range via the Lucin Cutoff railroad causeway across the lake.
Lake Point is an unincorporated community on the eastern edge of northern Tooele County, Utah, United States.
The Raft River Mountains are a mountain range in northern Box Elder County, Utah, United States. The mountains are located in the Raft River Division of the Minidoka Ranger District of the Sawtooth National Forest. The highest point is Bull Mountain, near the Dunn Benchmark, at 9,925 ft (3,025 m), and the ghost town of Yost is on the north-central slopes. Tributaries of the Raft River drain the northern slopes of the range to the Snake River then Columbia River and Pacific Ocean, while the southern slopes drain to the Great Salt Lake.
The Overland Trail was a stagecoach and wagon trail in the American West during the 19th century. While portions of the route had been used by explorers and trappers since the 1820s, the Overland Trail was most heavily used in the 1860s as a route alternative to the Oregon, California, and Mormon trails through central Wyoming. The Overland Trail was famously used by the Overland Stage Company owned by Ben Holladay to run mail and passengers to Salt Lake City, Utah, via stagecoaches in the early 1860s. Starting from Atchison, Kansas, the trail descended into Colorado before looping back up to southern Wyoming and rejoining the Oregon Trail at Fort Bridger. The stage line operated until 1869 when the completion of the First Transcontinental Railroad eliminated the need for mail service via stagecoach.
Howard Stansbury was a major in the U.S. Army Corps of Topographical Engineers. His most notable achievement was leading a two-year expedition (1849–1851) to survey the Great Salt Lake and its surroundings. The expedition report entitled Exploration and survey of the valley of the Great Salt Lake of Utah, including a reconnaissance of a new route through the Rocky Mountains was published in 1852 providing the first serious scientific exploration of the flora and fauna of the Great Salt Lake Valley as well as a favorable impression of the members of The Church of Jesus Christ of Latter-day Saints, who had settled there beginning in 1847.
The Stansbury Mountains are a 28-mile (45 km) long mountain range located in eastern Tooele County, Utah. It is named for U.S. Army Major Howard Stansbury, a topographical engineer, who led an expedition that surveyed the region.
Skull Valley is a 40-mile (64 km) long valley located in east Tooele County, Utah, United States at the southwest of the Great Salt Lake. The valley trends north–south, but turns slightly northeast to meet Stansbury Bay,.
The Tonto Group is a name for an assemblage of related sedimentary strata, collectively known by geologists as a Group, that comprises the basal sequence Paleozoic strata exposed in the sides of the Grand Canyon. As currently defined, the Tonto groups consists of the Sixtymile Formation, Tapeats Sandstone, Bright Angel Shale, Muav Limestone, and Frenchman Mountain Dolostone. Historically, it included only the Tapeats Sandstone, Bright Angel Shale, and Muav Limestone. Because these units are defined by lithology and three of them interfinger and intergrade laterally, they lack the simple layer cake geology as they are typically portrayed as having and geological mapping of them is complicated.
The Bass Formation, also known as the Bass Limestone, is a Mesoproterozoic rock formation that outcrops in the eastern Grand Canyon, Coconino County, Arizona. The Bass Formation erodes as either cliffs or stair-stepped cliffs. In the case of the stair-stepped topography, resistant dolomite layers form risers and argillite layers form steep treads. In general, the Bass Formation in the Grand Canyon region and associated strata of the Unkar Group-rocks dip northeast (10°–30°) toward normal faults that dip 60+° toward the southwest. This can be seen at the Palisades fault in the eastern part of the main Unkar Group outcrop area. In addition, thick, prominent, and dark-colored basaltic sills intrude across the Bass Formation.
The geology of Morocco formed beginning up to two billion years ago, in the Paleoproterozoic and potentially even earlier. It was affected by the Pan-African orogeny, although the later Hercynian orogeny produced fewer changes and left the Maseta Domain, a large area of remnant Paleozoic massifs. During the Paleozoic, extensive sedimentary deposits preserved marine fossils. Throughout the Mesozoic, the rifting apart of Pangaea to form the Atlantic Ocean created basins and fault blocks, which were blanketed in terrestrial and marine sediments—particularly as a major marine transgression flooded much of the region. In the Cenozoic, a microcontinent covered in sedimentary rocks from the Triassic and Cretaceous collided with northern Morocco, forming the Rif region. Morocco has extensive phosphate and salt reserves, as well as resources such as lead, zinc, copper and silver.
The geology of Utah includes rocks formed at the edge of the proto-North American continent during the Precambrian. A shallow marine sedimentary environment covered the region for much of the Paleozoic and Mesozoic, followed by dryland conditions, volcanism and the formation of the basin and range terrain in the Cenozoic. Utah is a state in the western United States.