The ridge which separates Versilia from Garfagnana, in the part which connects Mount Croce (m. 1314) with the Pania della Croce (m. 1858), is made up of a particular type of limestone rock where impressive cavities can often form, called “tecchie”, characterized by a wide entrance which can be seen from afar, which go into…
THE LITTLE MINE OF PORTO AZZURRO: A COMPULSORY DESTINATION FOR MINERAL ENTHUSIASTS. In our article L’ISOLA D’ELBA: UN PARADISO (QUASI) PERDUTO PER GLI APPASSIONATI DI MINERALI. we talked about the ceased mineral activity which beginning in the Etruscan Era had made the Island of Elba the main source of supply of iron for Italy. However…
After four snowfalls in Autumn, accompanied by very rigid temperatures (up to -5°C.) and after the rain which has characterized the Christmas holidays, at the Grotta del Vento the epiphany has brought a glimpse of Summer, or at least a warm Spring. The air current, which normally in Winter gets sucked from the touristic entrance…
On 22/08/17 we published an article about boxworks, which are the result of the corrosive action that the carbonic acid exerts on the dolomitic limestone of the first itinerary, isolating a network of fine layers of calcite. This time let’s talk about other phenomena of corrosion, made on the same type of rock a few…
On first sight they look like boxworks but they are not. While boxworks are very thin layers of calcite sticking out that have resisted to the corrosion of the dolomitic limestone which surrounded it, these protruding veins, clearly visible in the part of the tunnel which separates the natural entrance of the cave from the…
La Grotta di Stiffe è la risorgenza attiva di un sistema sotterraneo che inizia dagli inghiottitoi situati 600 metri più in alto, sull’Altopiano delle Rocche, in provincia dell’Aquila. Attrezzata con comodi sentieri, è caratterizzata dalla continua presenza di un copioso fiume sotterraneo, interrotto in due punti da fragorose cascate che precipitano nelle acque tumultuose di piccoli laghi sotterranei.
