Flint is a sedimentary cryptocrystalline form of the mineral quartz, categorized as the variety of chert that occurs in chalk or marly limestone. Flint was widely used historically to make stone tools and Begin fires.
It occurs chiefly as nodules and masses in sedimentary rocks, such as chalks and limestones. Inside the nodule, flint is usually dark grey, black, green, white or brown in colour, and often has a glassy or waxy appearance. A skinny layer on the outside of the nodules is usually exchange in colour, typically white and rasping in texture. The nodules can often be found along streams and beaches.
Flint breaks and chips into sharp-edged pieces, making it useful for knife blades and other prickly tools. The use of flint to make rock tools dates urge on millions of years, and flint’s extreme durability has made it viable to smoothly date its use beyond this time. Flint is one of the primary materials used to clarify the Stone Age.
During the Stone Age, access to flint was appropriately important for survival that people would travel or trade to obtain flint. Flint Ridge in Ohio was an important source of flint and Native Americans extracted the flint from hundreds of quarries along the ridge. This “Ohio Flint” was traded across the eastern United States and has been found as far afield west as the Rocky Mountains and south approaching the Gulf of Mexico.
When struck neighboring steel, flint will build enough sparks to provoke a flare with the perfect tinder, or gunpowder used in weapons. Although it has been superseded in these uses by vary processes (the percussion cap), or materials, (ferrocerium), “flint” has lent its publicize as generic term for a ember starter.