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Sioux Quartzite
The Sioux Quartzite is a Proterozoic quartzite that is found in the region around the intersection of Minnesota, South Dakota, and Iowa, and correlates with other rock units throughout the upper midwestern and southwestern United States. It was formed by braided river deposits, and its correlative units are thought to possibly define a large sedimentary wedge that once covered the passive margin on the then-southern side of the North American craton. In human history, it provided the catlinite, or pipestone, that was used by the Plains Indians to carve ceremonial pipes. With the arrival of Europeans, it was heavily quarried for building stone, and was used in many prominent structures in Sioux Falls, South Dakota and shipped to construction sites around the Midwest. Sioux Quartzite has been and continues to be quarried in Jasper, Minnesota at the Jasper Stone Company and Quarry, which itself was posted to the National Register of Historic Places on January 5, 1978. Jasper, Min ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nebraska
Nebraska () is a state in the Midwestern region of the United States. It is bordered by South Dakota to the north; Iowa to the east and Missouri to the southeast, both across the Missouri River; Kansas to the south; Colorado to the southwest; and Wyoming to the west. It is the only triply landlocked U.S. state. Indigenous peoples, including Omaha, Missouria, Ponca, Pawnee, Otoe, and various branches of the Lakota ( Sioux) tribes, lived in the region for thousands of years before European exploration. The state is crossed by many historic trails, including that of the Lewis and Clark Expedition. Nebraska's area is just over with a population of over 1.9 million. Its capital is Lincoln, and its largest city is Omaha, which is on the Missouri River. Nebraska was admitted into the United States in 1867, two years after the end of the American Civil War. The Nebraska Legislature is unlike any other American legislature in that it is unicameral, and its members a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
K–Ar Dating
Potassium–argon dating, abbreviated K–Ar dating, is a radiometric dating method used in geochronology and archaeology. It is based on measurement of the product of the radioactive decay of an isotope of potassium (K) into argon (Ar). Potassium is a common element found in many materials, such as feldspars, micas, clay minerals, tephra, and evaporites. In these materials, the decay product is able to escape the liquid (molten) rock, but starts to accumulate when the rock solidifies ( recrystallizes). The amount of argon sublimation that occurs is a function of the purity of the sample, the composition of the mother material, and a number of other factors. These factors introduce error limits on the upper and lower bounds of dating, so that the final determination of age is reliant on the environmental factors during formation, melting, and exposure to decreased pressure or open air. Time since recrystallization is calculated by measuring the ratio of the amount of accumulated to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhyolite
Rhyolite ( ) is the most silica-rich of volcanic rocks. It is generally glassy or fine-grained (aphanitic) in texture, but may be porphyritic, containing larger mineral crystals ( phenocrysts) in an otherwise fine-grained groundmass. The mineral assemblage is predominantly quartz, sanidine, and plagioclase. It is the extrusive equivalent to granite. Rhyolitic magma is extremely viscous, due to its high silica content. This favors explosive eruptions over effusive eruptions, so this type of magma is more often erupted as pyroclastic rock than as lava flows. Rhyolitic ash-flow tuffs are among the most voluminous of continental igneous rock formations. Rhyolitic tuff has been extensively used for construction. Obsidian, which is rhyolitic volcanic glass, has been used for tools from prehistoric times to the present day because it can be shaped to an extremely sharp edge. Rhyolitic pumice finds use as an abrasive, in concrete, and as a soil amendment. Description Rhyolite i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Year
A year or annus is the orbital period of a planetary body, for example, the Earth, moving in its orbit around the Sun. Due to the Earth's axial tilt, the course of a year sees the passing of the seasons, marked by change in weather, the hours of daylight, and, consequently, vegetation and soil fertility. In temperate and subpolar regions around the planet, four seasons are generally recognized: spring, summer, autumn and winter. In tropical and subtropical regions, several geographical sectors do not present defined seasons; but in the seasonal tropics, the annual wet and dry seasons are recognized and tracked. A calendar year is an approximation of the number of days of the Earth's orbital period, as counted in a given calendar. The Gregorian calendar, or modern calendar, presents its calendar year to be either a common year of 365 days or a leap year of 366 days, as do the Julian calendars. For the Gregorian calendar, the average length of the calendar year (t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arizona
Arizona ( ; nv, Hoozdo Hahoodzo ; ood, Alĭ ṣonak ) is a state in the Southwestern United States. It is the 6th largest and the 14th most populous of the 50 states. Its capital and largest city is Phoenix. Arizona is part of the Four Corners region with Utah to the north, Colorado to the northeast, and New Mexico to the east; its other neighboring states are Nevada to the northwest, California to the west and the Mexican states of Sonora and Baja California to the south and southwest. Arizona is the 48th state and last of the contiguous states to be admitted to the Union, achieving statehood on February 14, 1912. Historically part of the territory of in New Spain, it became part of independent Mexico in 1821. After being defeated in the Mexican–American War, Mexico ceded much of this territory to the United States in 1848. The southernmost portion of the state was acquired in 1853 through the Gadsden Purchase. Southern Arizona is known for its desert cl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New Mexico
) , population_demonym = New Mexican ( es, Neomexicano, Neomejicano, Nuevo Mexicano) , seat = Santa Fe , LargestCity = Albuquerque , LargestMetro = Tiguex , OfficialLang = None , Languages = English, Spanish ( New Mexican), Navajo, Keres, Zuni , Governor = , Lieutenant Governor = , Legislature = New Mexico Legislature , Upperhouse = Senate , Lowerhouse = House of Representatives , Judiciary = New Mexico Supreme Court , Senators = * * , Representative = * * * , postal_code = NM , TradAbbreviation = N.M., N.Mex. , area_rank = 5th , area_total_sq_mi = 121,591 , area_total_km2 = 314,915 , area_land_sq_mi = 121,298 , area_land_km2 = 314,161 , area_water_sq_mi = 292 , area_water_km2 = 757 , area_water_percent = 0.24 , population_as_of = 2020 , population_rank = 36th , 2010Pop = 2,117,522 , population_density_rank = 45th , 2000DensityUS = 17.2 , 2000Density = 6.62 , MedianHouseholdIncome = $51,945 , IncomeRank = 45th , AdmittanceOrder ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flambeau, Rusk County, Wisconsin
Flambeau is a town in Rusk County, Wisconsin, United States. The population was 1,067 at the 2000 census. Geography According to the United States Census Bureau, the town has a total area of 34.9 square miles (90.3 km2), of which 34.6 square miles (89.5 km2) is land and 0.3 square mile (0.8 km2) (0.86%) is water. Demographics As of the census of 2000, there were 1,067 people, 398 households, and 308 families residing in the town. The population density was 30.9 people per square mile (11.9/km2). There were 438 housing units at an average density of 12.7 per square mile (4.9/km2). The racial makeup of the town was 98.13% White, 0.28% African American, 0.19% Native American, 0.09% Asian, 0.47% Pacific Islander, 0.09% from other races, and 0.75% from two or more races. Hispanic or Latino of any race were 0.47% of the population. There were 398 households, out of which 35.9% had children under the age of 18 living with them, 65.6% were married couples ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Waterloo, Wisconsin
Waterloo is a city in Jefferson County in the U.S. state of Wisconsin. As of the census of 2020, the population was 3,483. The name Waterloo was suggested by Mr. Wilt, a Frenchman living here, who was one of Napoleon's soldiers, at the battle of Waterloo. Geography Waterloo is located at , (43.18366, -88.989965) at the intersection of Wisconsin Highway 89 and Wisconsin Highway 19 in northwestern Jefferson County. According to the United States Census Bureau, the city has a total area of , of which, is land and is water. Demographics As of 2000, the median income for a household in the city was $50,221, and the median income for a family was $56,446. The per capita income for the city was $23,011. About 5.0% of families and 4.8% of the population were below the poverty line, including 5.8% of those under age 18 and 7.1% of those age 65 or over. 2010 census As of the census of 2010, there were 3,333 people, 1,331 households, and 867 families residing in the city. The popul ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Barron, Wisconsin
Barron is a city in Barron County (of which it is the county seat), in the U.S. state of Wisconsin. The population was 3,423 at the 2010 census. The city is surrounded by the Town of Barron. History Originally named Quaderer's Camp after local lumber foreman John Quaderer, the name was changed to Barron in honor of Henry D. Barron after the location became the county seat of Barron County, besting Rice Lake. Geography Barron is located at (45.400527, -91.847948). According to the United States Census Bureau, the city has a total area of , of which, is land and is water. Barron is along U.S. Highway 8 and Wisconsin Highway 25. Demographics 2010 census At the 2010 census, there were 3,423 people, 1,422 households and 829 families living in the city. The population density was . There were 1,526 housing units at an average density of . The racial makeup was 87.2% White, 8.8% African American, 0.8% Native American, 0.7% Asian, 0.8% from other races, and 1.7% from tw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Baraboo
Baraboo is a city in the Midwest and the county seat of Sauk County, Wisconsin, United States. The largest city in the county, Baraboo is the principal city of the Baraboo Micropolitan Statistical Area. Its 2020 population was 12,556. It is situated on the Baraboo River. Baraboo is home to the Circus World Museum, the former headquarters and winter home of the Ringling brothers circus. The Al. Ringling Theatre is an active landmark in the city. Baraboo is also near Devil's Lake State Park, and Aldo Leopold's Shack and Farm. History Early settlement The area around Baraboo was the site of a Kickapoo village as early as 1665. The current community was established by Abe Wood in 1838, and was originally known as the village of Adams. In 1839 several settlers arrived and started building cabins, and a saw mill. In 1846 it became the county seat of Sauk County after a fierce fight with the nearby village of Reedsburg. In 1852, the village was renamed "Baraboo", after the ne ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
