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.
On the rocks
Joshua Tree is a place where geology reigns supreme. Visitors cannot help but feeling in awe with the majestic landscape around and ask themselves: what… Leggi tutto »L'origine dei paesaggi granitici di Joshua Tree (California, USA)
If you remember my previous post, you will remember that I have left you with one question: what are the ‘dark balls’ in the granite?… Leggi tutto »Cosa sono le 'palle nere' nel granito di Sant'Andrea (Isola d'Elba)?
I was a student the first time I visited the outcrops of Sant’Andrea in the far 2011. We must have looked really weird: a class… Leggi tutto »Cosa sono i 'sassi bianchi' incastonati nelle rocce di Sant'Andrea (Isola d'Elba)?
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)
“Every town Has its ups and downs Sometime ups Outnumber the downs But not in Nottingham” Personally, I have to say that having such a… Leggi tutto »Il fiume che una volta attraversava Nottingham – Le arenarie di Nottingham, Regno Unito
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
When I was teaching with the course of Geology I in Pisa, I used to tell students: “the best way to learn how to recognize… Leggi tutto »Camminando su un tappeto di cristalli di calcite GIGANTI (Moriglion di Penna, Lucca)
The glacier of Neves, located on the Italian side of the Eastern Alps at the border with Austria, close to the Neves Lake (Neves-Stausee), is… Leggi tutto »Quando due magmi diversi si incontrano (Neves, Alto Adige)