Keywords: Cave basalt formation.jpg en <br/> Image title Cave basalt formation at Akun Island in Alaska USA Image from Public domain images website http //www public-domain-image com/full-image/nature-landscapes-public-domain-images-pictures/caves-public-domain-images-pictures/cave-basalt-formation jpg html http //www public-domain-image com/public-domain-images-pictures-free-stock-photos/nature-landscapes-public-domain-images-pictures/caves-public-domain-images-pictures/cave-basalt-formation jpg This photo can also be viewed at a U S Fish and Wildlife Service web page http //digitalmedia fws gov/cdm/singleitem/collection/natdiglib/id/3970/rec/4 Steve Hillebrand U S Fish and Wildlife Service 2006-08-04 Transferred by Fæ on 2013-02-27 This file is in public domain not copyrighted no rights reserved free for any use You can use this picture for any use including commercial purposes without the prior written permission and without fee or obligation PD-author Steve Hillebrand U S Fish and Wildlife Service Images uploaded by Fæ Public-domain-image com Columnar basalts in Alaska Akun Island Sea caves of United States |