https://geoscan.nrcan.gc.ca/starweb/nrcanphoto/servlet.starweb?path=nrcanphoto/nrcanphotofastlink_f.web&search1=R=58099
Natural Resources Canada, 1 juin 2004
Webster, T, Examples of Lower Flow Unit (LFU) of the North Mountain basalts are presented on photos a), b), and c). Well developed columnar jointing can be...
Photographie