The flint is a Sedimentary rock Silice uses very hard, made up
of almost pure Calcédoine, and of impurities such as water or
Oxyde S, the latter influencing its color. LayersVery abundant,
the flint is like silicon accident in the Craie or the Calcaire
in the form of nodules, and in grounds Argile ux, some of these
grounds (as in High-Normandy or Champagne) being deteriorations
of chalk. The flint is formed when the sea water is saturated
with Silice. This phenomenon occurs either in tropical Climat,
when the ground S reds underwent a physical and chemical
deterioration (Météorisation) intense, or by the decomposition
of the Exosquelette S silicieux of marine organizations such as
the sponge S. silica precipitates then on the bed of the oceans
by filling the cavities left in the Craie (or another form of
Calcaire) and crystallizes in nodules. The nodule, while being
formed, épigenise surrounding limestones, i.e. the molecules of
Carbonate of calcium are replaced with one by silica molecules,
without changing