Stone formation. Sandstones, limestones
The weathering of rocks formed a deposit of detrital material.
This deposit, originally furniture (sandy deserts or beaches) has been consolidated by cementing of the grains under the influence of various factors (alternating water, heat ...).
Sedimentary rocks generally consist of parallel layers, formed in large settling ponds.
There are over three hundred different rocks listed in France. Their structures vary widely according to the components that accompany the main component, carbonate of lime.
Limestone is formed by a multitude of agglomerated grains cemented together by particles separated in a solid mass.