tettonica e deriva continenti

tettonica e deriva continentideriva continentihttps://youtu.be/h3I4zL3dYU8fossilihttps://youtu.be/-RB2Sbj5M60geotettonicahttps://youtu.be/wc2bv8stvXkorogenesi e zollehttps://youtu.be/WpQcmPXRXd0