Cleaved stone is not extracted in blocks like marble and granite, but by shearing using hydraulic excavators or by mining methods.
The stone masses extracted are split into sheets of variable thicknesses and irregular dimensions, for use in crazy paving.
A stratum is a homogeneous layer of sedimentary rock with a thickness that may vary by a few centimeters to hundreds of meters. Stratification indicates how the rock deposits in strata. The rock's homogeneity is relative and is the result of differentiating facies.
In geology,the term facies designates the category in which a mineral or rock can be classified according to its properties. It may refer to the exterior aspect and be descriptive (brecciated, petrographic, acicular, etc.) or have genetic connotations (metamorphic facies).
Mont du moulin 30750 Lanuejols FRANCE.