Rocks are not all equal. Before you call me a rock racist, what I mean is that they are very different in terms of chemistry and this causes them to behave very differently when they are altered by hydrothermal fluids. In the case that I am going to show, this means that some rocks are basically indifferent to chemical alterations, while in others the interaction with fluids produces beautiful crystals.
The Mediterranean Region is home of one of the most beautiful, yet mysterious, sedimentary rock in the world: the Rosso Ammonitico limestone. The beauty of… Leggi tutto »Il calcare Rosso Ammonitico di Sassorosso (Garfagnana)
Today we venture in one of the most spectacular – yet lesser-known – places of Arizona: Walnut Canyon. Walnut canyon is a marvel of nature… Leggi tutto »Come la geologia di Walnut Canyon ha plasmato questi insediamenti pre-Colombiani
Girona is a lovely fortified medieval town in Catalonia, in the northeastern part of Spain. The city was built at the confluence of four rivers… Leggi tutto »Geologia urbana: i nummuliti fossili delle mura di Girona