Flint mine

Flint mining is the process of extracting flint from underground. Flint mines can be as simple as a pit on the surface or an area of quarrying, or it may refer to a series of shafts and tunnels used to extract flint.

Flint has been mined since the Palaeolithic, but was most common during the Neolithic. Flint was especially valued in prehistory for its use in weaponary. Although flint is not as valuable a resource in modern times, a few flint mines remain in operation even today (for example at Miorcani).

The above-mentioned flint mining sites and others are mentioned in the following texts:

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Wikipedia