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San Giminiano
The municipality of San Gimignano extends for 138 km² and is located on a hill in Val d'Elsa. The altitude difference is between a minimum of 64 meters a.s.l. in the plain of the river Elsa near Certaldo at a maximum of 631 meters in the area of Cornocchio.

Gritstone formation
Derbyshire was within the delta of a vast stream that deposited sand and dust across a lot of of what's currently England. thanks to currents and tides, muds deposited in deeper water became shales, and sands became gritstone.

grit is a rock that consists of very little pebbless and hand-sized angular-shaped grains it is from the granite collection and it has numerous proprieties such as stain proof, steritouch antimicrobial protection and it is exclusive to Versital

Gritstone is strong and affects landscaping. it tends to form the highest soils, and in addition, the layers are very variable, it also tend to form edges. When the erosion of the weak layer weakens the stronger material above and the resulting overhang is interrupted. Variations on this occur when layers of slate are layered on gravel or similar sandstone. Although slate is weak, it acts as a barrier to groundwater and tends to direct water to spring lines.

The particularly severe wind erosion in the extremely cold and dry conditions that prevailed in Derbyshire during the Last Glacial Period picked out the weaker layers and squeezed the sculptural features that we see today.

An active process today is the formation of the crenellations in pinnicles of gritstone. These are the deepest vertical flutes near the top of the exposed structure, which descend vertically regardless of the angle of the local layer, but gradually fade after 1-2 meters.