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Chalk is an unincorporated community in Cottle County, in the U.S. state of Texas. [1] According to the Handbook of Texas , the community had a population of 17 in 2000. History
The putative galloanseran bird Austinornis lentus has been found in the Austin Chalk. [2] [3] The general absence of dinosaurs is a reflection of the Austin limestone being marine in origin, primarily composed of microscopic shell fragments from floating sea organisms known as "coccolithophores" (the same organisms that contributed to the White Cliffs of Dover, on the south coast of England). [4]
Edwin Binney (November 24, 1866 – December 17, 1934) was an American entrepreneur and inventor, who created the first dustless white chalk, and along with his cousin C. Harold Smith (born London, 1860 - died, 1931), was the founder of handicrafts company Binney & Smith, which marketed his invention of the Crayola crayon.
The timeline of historic inventions is a chronological list of particularly significant technological inventions and their inventors, where known. [ a ] The dates in this article make frequent use of the units mya and kya , which refer to millions and thousands of years ago, respectively.
(Credit: University of North Texas / Portal to Texas History) Civil rights victory 70 years ago In 2024, the landmark Brown vs. Board of Education case is likely to be in the forefront of civil ...
The ruins of a Han dynasty (202 BCE – 220 CE) Chinese watchtower made of rammed earth in Dunhuang, Province of Gansu, China, at the eastern end of the Silk Road.. Rammed earth is a technique for constructing foundations, floors, and walls using compacted natural raw materials such as earth, chalk, lime, or gravel. [1]
Chalk is a soft, white, porous, sedimentary carbonate rock.It is a form of limestone composed of the mineral calcite and originally formed deep under the sea by the compression of microscopic plankton that had settled to the sea floor.
This is a timeline of the Republic of Texas, spanning the time from the Texas Declaration of Independence from Mexico on March 2, 1836, up to the transfer of power to the State of Texas on February 19, 1846.