The Cenomanian chalky marl from Moldova is one of the best tool-making flints in Europe .
In Europe , some of the best toolmaking flint has come from Belgium ( Obourg , flint mines of Spiennes ) , Neolithic Flint Mines of Petit-Spiennes Official web site the coastal chalks of the English Channel , the Paris Basin , Thy in Jutland ( flint mine at Hov ) , the Sennonian deposits of Rügen , Grimes Graves in England , the Upper Cretaceous chalk formation of Dobruja and the lower Danube ( Balkan flint ) , the Cenomanian chalky marl formation of the Moldavian Plateau ( Miorcani flint ) and the Jurassic deposits of the Kraków area and Krzemionki in Poland .
Flint