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Chalk is so common in Cretaceous marine beds that the Cretaceous Period was named for these deposits. The name Cretaceous was derived from Latin creta, meaning chalk. [10] Some deposits of chalk were formed after the Cretaceous. [11] The Chalk Group is a European stratigraphic unit deposited during the late Cretaceous Period.
From the late 18th century to the end of the 19th century, bread sold in England and the United States was often adulterated with hazardous materials, including chalk, sawdust, alum, plaster, clay and ammonium carbonate. Frederick Accum was the first to raise alarm to the food adulteration in 1820.
Chalk mining is the extraction of chalk from underground and above ground deposits by mining. [1] Mined chalk is used mostly to make cement and bricks . Chalk mining was widespread in Britain in the 19th century because of the large amount of construction underway (and the Industrial Revolution ). [ 2 ]
The Chalk Group (often just called the Chalk) is the lithostratigraphic unit (a certain number of rock strata) which contains the Upper Cretaceous limestone succession in southern and eastern England.
The Japanese Chalk Association reportedly banned imports of Hagoromo Fulltouch from South Korea for five years, with the concern that it would destabilize the market. [20] In 2017, the company began importing the brand to Vietnam. The product is also sold in Europe and America, particularly through the e-commerce website Amazon. [20]
Then Edwin Binney, working with his wife, Alice Stead Binney, developed his own famous product line of wax crayons beginning on June 10, 1903, [10] which it sold under the brand name Crayola. The Crayola name was coined by Alice Binney who was a former schoolteacher. It comes from craie (French for "chalk") and ola for "oleaginous" or "oily."
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]
Chalk art by kids in the Czech Republic. On September 16–17, 2006, a global event was held to promote peace through sidewalk chalk drawings. [5] Chalk4Peace was a project planned by an artist from Arlington, Virginia named John Aaron, who asked children and teens from the age of eight to age eighteen to participate in groups across the world to draw chalk drawings that would illustrate peace ...