Unlike the island of Lampedusa and Lampione, which also pertain to the so-called Pelagian block (characterized by large, un-deformed sequences surfacing in the region of the Tunisian Sahel, Libya, the Maltese Islands and the Iblean Plateau) and are of a purely calcareous nature, Linosa is of volcanic origin and it stands on a large graben (with a depth of more than a thousand meters) which determines its extremely steep coastal profile.
Its geological origins are quite recent: by dating the lava and from the age of the fossils present in the stratified tuffs of the Cala Pozzolana di Ponente, show that Linosa emerged during the Early Quaternary, originating from the eruptive activities that occurred along the fracture line separating the East coast of Sicily from the Tunisian coast.
It is probable that the same volcanic activity that gave birth to the island of Linosa gave rise, thanks to a fundamentally alkaline volcanism, to the island of Pantelleria, whose emerged parts only represent but the culmination of more impressive underlying geological structures.
The volcanic craters, although evolved in calderas following the collapse of the magmatic chambers, are still very evident: at the centre of the island, low and wide (600 meters in diameter), the main crater, the Fossa del Cappellano, is densely cultivated due to the fertility of its soil. There are three other volcanic cones around it: Monte Vulcano (195 m), Monte Rosso (186 m) and Monte Nero (107 m). At present the island is deeply inactive, since the volcanic activity has been completed at least 25,000 years ago.
AN EYE OVER LINOSA...
L'ISOLA DELLE BERTE
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