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… Read More »The origin of the granite landscape of Joshua Tree National Park
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?… Read More »What are the ‘dark balls’ in the granite of Sant’Andrea (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… Read More »What are the white ‘stones’ nestled in the rocks of Sant’Andrea (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… Read More »The Rosso Ammonitico limestone of Sassorosso (Garfagnana, Italy)
“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… Read More »The river that once flowed through Nottingham – The sandstones of Nottingham, U.K.
Elba is a paradise for beach lovers and summer sports, with its delicate coastal sceneries and scented footpaths hidden by the Mediterranean scrub. Certainly, except… Read More »The ancient desert of the island of Elba
Today we venture in one of the most spectacular – yet lesser-known – places of Arizona: Walnut Canyon. Walnut canyon is a marvel of nature… Read More »How the geology of Walnut Canyon shaped pre-Colombian dwellings
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… Read More »Walking on a carpet of HUGE calcite crystals (Moriglion di Penna, Lucca, Italy)
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… Read More »When two different magmas meet (Neves, Sud Tirol)