Various applications of the "Nuclear Track Method" to Applied Geology and case studies are presented. In Geochronology, after a short review of the fission-track (FT) dating principles and main uses, one discuss some typical applications to Metallogeny and Petroleum Geology. In Applied Geochemistry, the track method is used for uranium prospection and uranium-ore studies, via, respectively, field measurements of radon-222 (222Rn) emanations and uranium- FT micromapping in petrographical thin sections. In Geophysics, important applications are the detection and prediction of earthquakes via the continuous record of 222Rn emanations along major faults
