© Steve Russell November 19 It may be hard to believe, but these sand dunes, the largest in North America… … were formed by millions and millions of years of erosion of the San Juan mountains, more than 65 miles west of here. The rocks are broken down by countless centuries of erosion water, freezing, […]

Bli abonnent eller logg inn – hvis du allerede er abonnent – for å lese denne artikkelen. Pluss-artikler blir frigitt 24 timer etter publisering. Arkiverte artikler er forbeholdt abonnenter.