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Jurgens Site
The Jurgens Site is a Paleo-Indian site located near Greeley in Weld County, Colorado. While the site was used primarily to hunt and butcher '' bison antiquus'', there is evidence that the Paleo-Indians also gathered plants and seeds for food about 7,000 to 7,500 BC. Geography The site is located on a South Platte River terrace in northeastern Colorado, east of Greeley near the town of Kersey.Gibbon, Ames, p. 404. There are three sites located nearby; The Frazier site is away and the Dent site is southwest. History Paleo-Indian Paleo-Indians were primarily hunters of large mammals, such as the Bison antiquus,Griffin-Pierce, 130. during a transitional period from Ice Age to Ice Age summer. As the climate warmed, glacial run-off created lakes and savannas. At the end of the summer period the land became drier, food was not as abundant, and they became extinct. People adapted by hunting smaller mammals and gathering wild plants to supplement their diet. The items f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Colorado State Highway 37
Colorado (, other variants) is a state in the Mountain West subregion of the Western United States. It encompasses most of the Southern Rocky Mountains, as well as the northeastern portion of the Colorado Plateau and the western edge of the Great Plains. Colorado is the eighth most extensive and 21st most populous U.S. state. The 2020 United States census enumerated the population of Colorado at 5,773,714, an increase of 14.80% since the 2010 United States census. The region has been inhabited by Native Americans and their ancestors for at least 13,500 years and possibly much longer. The eastern edge of the Rocky Mountains was a major migration route for early peoples who spread throughout the Americas. "''Colorado''" is the Spanish adjective meaning "ruddy", the color of the Fountain Formation outcroppings found up and down the Front Range of the Rocky Mountains. The Territory of Colorado was organized on February 28, 1861, and on August 1, 1876, U.S. President Ulysses S. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Holocene Climatic Optimum
The Holocene Climate Optimum (HCO) was a warm period that occurred in the interval roughly 9,000 to 5,000 years ago BP, with a thermal maximum around 8000 years BP. It has also been known by many other names, such as Altithermal, Climatic Optimum, Holocene Megathermal, Holocene Optimum, Holocene Thermal Maximum, Hypsithermal, and Mid-Holocene Warm Period. The warm period was followed by a gradual decline, of about 0.1 to 0.3 °C per millennium, until about two centuries ago (when this trend was rapidly reversed due to human-produced greenhouse gas emissions). However, on a sub-millennial scale, there were regional warm periods superimposed on this decline. * For other temperature fluctuations, see temperature record. * For other past climate fluctuation, see paleoclimatology. * For the pollen zone and Blytt–Sernander period, associated with the climate optimum, see Atlantic (period). Global effects The Holocene Climate Optimum warm event consisted of increases of up t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Register Of Historic Places Listings In Weld County, Colorado
This is a list of the National Register of Historic Places listings in Weld County, Colorado. This is intended to be a complete list of the properties and districts on the National Register of Historic Places in Weld County, Colorado, United States. The locations of National Register properties and districts for which the latitude and longitude coordinates are included below, may be seen in a map. There are 41 properties and districts listed on the National Register in the county, and one formerly listed property. Current listings Former listings See also * List of National Historic Landmarks in Colorado * National Register of Historic Places listings in Colorado There are more than 1,500 properties and historic districts in Colorado listed on the National Register of Historic Places. They are distributed over 63 of Colorado's 64 counties; only the City and County of Broomfield has none. __NOTOC__ C ... References ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Science Foundation
The National Science Foundation (NSF) is an independent agency of the United States government that supports fundamental research and education in all the non-medical fields of science and engineering. Its medical counterpart is the National Institutes of Health. With an annual budget of about $8.3 billion (fiscal year 2020), the NSF funds approximately 25% of all federally supported basic research conducted by the United States' colleges and universities. In some fields, such as mathematics, computer science, economics, and the social sciences, the NSF is the major source of federal backing. The NSF's director and deputy director are appointed by the President of the United States and confirmed by the United States Senate, whereas the 24 president-appointed members of the National Science Board (NSB) do not require Senate confirmation. The director and deputy director are responsible for administration, planning, budgeting and day-to-day operations of the foundation, while t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Geological Survey
The United States Geological Survey (USGS), formerly simply known as the Geological Survey, is a scientific agency of the United States government. The scientists of the USGS study the landscape of the United States, its natural resources, and the natural hazards that threaten it. The organization's work spans the disciplines of biology, geography, geology, and hydrology. The USGS is a fact-finding research organization with no regulatory responsibility. The agency was founded on March 3, 1879. The USGS is a bureau of the United States Department of the Interior; it is that department's sole scientific agency. The USGS employs approximately 8,670 people and is headquartered in Reston, Virginia. The USGS also has major offices near Lakewood, Colorado, at the Denver Federal Center, and Menlo Park, California. The current motto of the USGS, in use since August 1997, is "science for a changing world". The agency's previous slogan, adopted on the occasion of its hundredt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Colorado Museum Of Natural History
The University of Colorado Museum of Natural History is a museum of natural history in Boulder, Colorado. With more than four million artifacts and specimens in the areas of anthropology, botany, entomology, paleontology and zoology, the museum houses one of the most extensive and respected natural history collections in the Rocky Mountain and Plains regions, making it one of the top university natural science museums in the country. In 2003, the University of Colorado Museum received accreditation by the American Alliance of Museums. The museum was founded in 1902, when Judge Junius Henderson was appointed its first curator. The University of Colorado Museum is housed on the University of Colorado Boulder campus in the Henderson Building. The museum is open daily from 9:00 a.m. to 5:00 p.m., except Saturday from 9:00 a.m. to 4:00 p.m. and Sunday from 10:00 a.m. to 4:00 p.m. References Museum of Natural history A natural history museum or museum of natural histo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Joe Ben Wheat
Joe Ben Wheat (1916–1997) was an American archaeologist, curator, teacher, and author known for his expertise on blanket weavings and textiles of the Navajo and other Indians in Arizona, New Mexico, and Colorado.Mobley-Tanaka, J.L. & Wilshusen R.H. (2003Joe Ben Wheat’s Excavation of Yellow Jacket Colorado. Retrieved March 27, 2009. His research focused on Mogollon, Anasazi, Great Plains Paleo-Indian, and African Paleolithic archaeology. He served as president of the Society for American Archaeology for two years (1966–67) and was the first Curator of Anthropology for the University of Colorado Museum; a position in which he held from 1953 to 1988.Cordell, L. & Eddy, F. WJoe Ben Wheat 1916-1997SAA Bulletin 15(5):12. Wheat taught for decades at the University of Colorado in Boulder and contributed to numerous archaeological articles, including the Encyclopædia Britannica. Wheat conducted excavations, most notably the Yellow Jacket Canyon site named the Joe Ben Wheat Si ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atlatl
A spear-thrower, spear-throwing lever or ''atlatl'' (pronounced or ; Nahuatl ''ahtlatl'' ) is a tool that uses leverage to achieve greater velocity in dart or javelin-throwing, and includes a bearing surface which allows the user to store energy during the throw. It may consist of a shaft with a cup or a spur at the end that supports and propels the butt of the spear. It's usually about as long as the user's arm or forearm. The user holds the spear-thrower in one hand, gripping near the end farthest from the cup. The user puts the butt end of the spear, or dart, in the cup, or grabs the spur with the end of the spear. The spear is much longer than the thrower. The user holds the spear parallel to the spear-thrower and going in the other direction. The user can hold the spear, with the index and thumb, with the same hand as the thrower, with the other fingers. The user reaches back with the spear pointed at the target. Then they make an overhand throwing motion with the thrower ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Debitage
In archaeology, debitage is all the material produced during the process of lithic reduction – the production of stone tools and weapons by knapping stone. This assemblage may include the different kinds of lithic flakes and lithic blades, but most often refers to the shatter and production debris, and production rejects. Debitage analysis Debitage analysis, a sub-field of lithic analysis, considers the entire lithic waste assemblage. The analysis is undertaken by investigating differing patterns of debris morphology, size, and shape, among other things. This allows researchers to make more accurate assumptions regarding the purpose of the lithic reduction. Quarrying activities, core reduction, biface creation, tool manufacture, and retooling are believed to leave significantly different debitage assemblages. Lithic manufacture from a quarried source, or from found cobbles also leave different signatures. Some claim that they can determine the sort of tools used to crea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Texas
Texas (, ; Spanish language, Spanish: ''Texas'', ''Tejas'') is a state in the South Central United States, South Central region of the United States. At 268,596 square miles (695,662 km2), and with more than 29.1 million residents in 2020, it is the second-largest U.S. state by both List of U.S. states and territories by area, area (after Alaska) and List of U.S. states and territories by population, population (after California). Texas shares borders with the states of Louisiana to the east, Arkansas to the northeast, Oklahoma to the north, New Mexico to the west, and the Mexico, Mexican States of Mexico, states of Chihuahua (state), Chihuahua, Coahuila, Nuevo León, and Tamaulipas to the south and southwest; and has a coastline with the Gulf of Mexico to the southeast. Houston is the List of cities in Texas by population, most populous city in Texas and the List of United States cities by population, fourth-largest in the U.S., while San Antonio is the second most pop ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alibates Flint Quarries National Monument
Alibates Flint Quarries National Monument is a U.S. national monument in the state of Texas. For thousands of years, people came to the red bluffs above the Canadian River for flint, vital to their existence. Demand for the high-quality, rainbow-hued flint is reflected in the distribution of Alibates flint through the Great Plains and beyond. Native Americans of the Ice Age Clovis culture used Alibates flint for spear points to hunt the Columbian mammoth before the Great Lakes were formed. The flint usually lies just below the surface at ridge level in a layer up to 6 ft thick. The quarry pits were not very large, between 5 and 25 ft wide and 4 to 7 ft deep. Many of these quarries were exploited by the Antelope Creek people of the Panhandle culture between 1200 and 1450 AD. The stone-slabbed, multiroom houses built by the Antelope Creek people have long been of interest to the public and studied by archaeologists. Today, this area is protected by the U.S. National Park Service a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quartzite
Quartzite is a hard, non- foliated metamorphic rock which was originally pure quartz sandstone.Essentials of Geology, 3rd Edition, Stephen Marshak, p 182 Sandstone is converted into quartzite through heating and pressure usually related to tectonic compression within orogenic belts. Pure quartzite is usually white to grey, though quartzites often occur in various shades of pink and red due to varying amounts of hematite. Other colors, such as yellow, green, blue and orange, are due to other minerals. The term ''quartzite'' is also sometimes used for very hard but unmetamorphosed sandstones that are composed of quartz grains thoroughly cemented with additional quartz. Such sedimentary rock has come to be described as orthoquartzite to distinguish it from metamorphic quartzite, which is sometimes called metaquartzite to emphasize its metamorphic origins. Quartzite is very resistant to chemical weathering and often forms ridges and resistant hilltops. The nearly pure silica conte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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