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Terlingua, Texas
Terlingua ( ) is a mining district and census-designated place (CDP) in southwestern Brewster County, Texas, United States. It is located near the Rio Grande and the villages of Lajitas and Study Butte, Texas, as well as the Mexican state of Chihuahua. The discovery of cinnabar, from which the metal mercury is extracted, in the mid-1880s brought miners to the area, creating a city of 2,000 people. The only remnants of the mining days are a ghost town of the Howard Perry-owned Chisos Mining Company and several nearby capped and abandoned mines, most notably the California Hill, the Rainbow, the 248, and the Study Butte mines. The mineral terlinguaite was first found in the vicinity of California Hill. The population of Terlingua as of 2020 was 78. History According to the historian Kenneth Baxter Ragsdale, "Facts concerning the discovery of cinnabar in the Terlingua area are so shrouded in legend and fabrication that it is impossible to cite the date and location of the fir ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Census-designated Place
A census-designated place (CDP) is a concentration of population defined by the United States Census Bureau for statistical purposes only. CDPs have been used in each decennial census since 1980 as the counterparts of incorporated places, such as self-governing cities, towns, and villages, for the purposes of gathering and correlating statistical data. CDPs are populated areas that generally include one officially designated but currently unincorporated community, for which the CDP is named, plus surrounding inhabited countryside of varying dimensions and, occasionally, other, smaller unincorporated communities as well. CDPs include small rural communities, edge cities, colonias located along the Mexico–United States border, and unincorporated resort and retirement communities and their environs. The boundaries of any CDP may change from decade to decade, and the Census Bureau may de-establish a CDP after a period of study, then re-establish it some decades later. Mo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cinnabar
Cinnabar (), or cinnabarite (), from the grc, κιννάβαρι (), is the bright scarlet to brick-red form of mercury(II) sulfide (HgS). It is the most common source ore for refining elemental mercury and is the historic source for the brilliant red or scarlet pigment termed vermilion and associated red mercury pigments. Cinnabar generally occurs as a vein-filling mineral associated with recent volcanic activity and alkaline hot springs. The mineral resembles quartz in symmetry and in its exhibiting birefringence. Cinnabar has a mean refractive index near 3.2, a hardness between 2.0 and 2.5, and a specific gravity of approximately 8.1. The color and properties derive from a structure that is a hexagonal crystalline lattice belonging to the trigonal crystal system, crystals that sometimes exhibit twinning. Cinnabar has been used for its color since antiquity in the Near East, including as a rouge-type cosmetic, in the New World since the Olmec culture, and in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jackson School Of Geosciences
The Jackson School of Geosciences at The University of Texas at Austin unites the Department of Geological Sciences with two research units, the Institute for Geophysics and the Bureau of Economic Geology. The Jackson School is both old and new. It traces its origins to a Department of Geology founded in 1888 but became a separate unit at the level of a college only on September 1, 2005. The school's formation resulted from gifts by the late John A. and Katherine G. Jackson initially valued at $272 million. The school's endowment as of December 31, 2015 is $442.3 million. Dr. Claudia Mora is the Dean of the Jackson School of Geosciences. Academics The Department of Geological Sciences offers the following undergraduate degree programs: Bachelor of Arts, Bachelor of Science in General Geology, Bachelor of Science in Environmental Science, Bachelor of Science in Geophysics, Bachelor of Science in Hydrogeology/Environmental Geology, Bachelor of Science in Teaching, Bachelor of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Retort
In a chemistry laboratory, a retort is a device used for distillation or dry distillation of substances. It consists of a spherical vessel with a long downward-pointing neck. The liquid to be distilled is placed in the vessel and heated. The neck acts as a condenser, allowing the vapors to condense and flow along the neck to a collection vessel placed underneath. In the chemical industry, a retort is an airtight vessel in which substances are heated for a chemical reaction producing gaseous products to be collected in a collection vessel or for further processing. Such industrial-scale retorts are used in shale oil extraction, the production of charcoal and in the recovery of mercury in gold mining processes and hazardous waste. A process of heating oil shale to produce shale oil, oil shale gas, and spent shale is commonly called retorting. Airtight vessels to apply pressure as well as heat are called autoclaves. In the food industry, pressure cookers are often ref ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Section (United States Land Surveying)
In U.S. land surveying under the Public Land Survey System (PLSS), a section is an area nominally , containing , with 36 sections making up one survey township on a rectangular grid. The legal description of a tract of land under the PLSS includes the name of the U.S. state, state, name of the County (United States), county, township number, range number, section number, and portion of a section. Sections are customarily Surveying, surveyed into smaller squares by repeated halving and quartering. A quarter section is and a "quarter-quarter section" is . In 1832 the smallest area of land that could be acquired was reduced to the quarter-quarter section, and this size parcel became entrenched in American mythology. After the American Civil War, Civil War, freedman, freedmen (freed slaves) were reckoned to be self-sufficient with "40 acres and a mule." In the 20th century real estate developers preferred working with parcels. The phrases "front 40" and "wikt:back forty, back 40, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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