A flint mine is an industrial site where, during the Neolithic and Early Bronze Age period, nodules of flint were extracted by hand from underground seams.
![Photograph of Grimes Graves, Weeting. From Picture Norfolk. Photograph of Grimes Graves, Weeting. From Picture Norfolk.](http://hbsmrgateway2.esdm.co.uk/norfolk/DataFiles/FullImages/1921.jpg)
Grimes Graves flint mines, Weeting. Courtesy of Norfolk County Council Library and Information Service.