12/17/2023 0 Comments Flint emc power utaptoiIt is formed from limey debris that was deposited at the bottom of inland Paleozoic seas hundreds of millions of years ago that hardened into limestone and later became infused with silica. The "Ohio flint" is the official gemstone of Ohio state. Puzzling giant flint formations known as paramoudra and flint circles are found around Europe but especially in Norfolk, England on the beaches at Beeston Bump and West Runton. Pebble beach made up of flint nodules eroded from the nearby chalk cliffs, Cape Arkona, Rügen, northeast Germany.įlint sometimes occurs in large flint fields in Jurassic or Cretaceous beds, for example, in Europe. Thin slices of the stone often reveal this effect. Pieces of coral and vegetation have been found preserved inside the flint similar to insects and plant parts within amber. Certain types of flint, such as that from the south coast of England and its counterpart on the French side of the Channel, contain trapped fossilised marine flora. The source of dissolved silica in the porous media could be the spicules of silicious sponges ( demosponges). This hypothesis would certainly explain the complex shapes of flint nodules that are found. One hypothesis is that a gelatinous material fills cavities in the sediment, such as holes bored by crustaceans or molluscs and that this becomes silicified. The exact mode of formation of flint is not yet clear, but it is thought that it occurs as a result of chemical changes in compressed sedimentary rock formations during the process of diagenesis. Origin Silicified remains of algae and silica pseudomorph after halite in flint. Although it has been superseded in these uses by different processes (the percussion cap), or materials ( ferrocerium), "flint" has lent its name as generic term for a fire starter. When struck against steel, flint will produce enough sparks to ignite a fire with the correct tinder, or gunpowder used in weapons, namely the flintlock firing mechanism. This "Ohio Flint" was traded across the eastern United States, and has been found as far west as the Rocky Mountains and south around the Gulf of Mexico. Flint Ridge in Ohio was an important source of flint, and Native Americans extracted the flint from hundreds of quarries along the ridge. ( October 2023) ( Learn how and when to remove this template message)ĭuring the Stone Age, access to flint was so important for survival that people would travel or trade long distances to obtain the stone. You may improve this section, discuss the issue on the talk page, or create a new section, as appropriate. The examples and perspective in this section may not represent a worldwide view of the subject. Flint is one of the primary materials used to define the Stone Age. The use of flint to make stone tools dates back more than three million years flint's extreme durability has made it possible to accurately date its use over this time. The nodules can often be found along streams and beaches.įlint breaks and chips into sharp-edged pieces, making it useful in constructing a variety of cutting tools, such as knife blades and scrapers. A thin, oxidised layer on the outside of the nodules is usually different in colour, typically white and rough in texture. Inside the nodule, flint is usually dark grey or black, green, white, or brown in colour, and has a glassy or waxy appearance. Flint was widely used historically to make stone tools and start fires.įlint occurs chiefly as nodules and masses in sedimentary rocks, such as chalks and limestones. 7.5 cm (3.0 in) wide)Ī piece of flint 9–10 cm (3.5–3.9 in) long, weighing 171 gramsįlint, occasionally flintstone, is a sedimentary cryptocrystalline form of the mineral quartz, categorized as the variety of chert that occurs in chalk or marly limestone. A sample of Miorcani flint from the Cenomanian chalky marl layer of the Moldavian Plateau ( c.
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