Guide to Arches National Park Nov 22, 2020 22:24:56 GMT -7 Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by 1dave on Nov 22, 2020 22:24:56 GMT -7 An EXCELLENT 44 page PRESENTATION by Hellmut H. Doelling of the Utah Geological Survey,Salt Lake City,UtahDownload from:www.utahgeology.org/road_logs/uga-29_first_edition/NP_guide/arches.pdfMost of Southeast Utah Odd Formations have been attributed to the Paradox Salt Formation, but I believe they are instead related to a previously unrecognized Comet Impact about 150 million years ago.forum.rocktumblinghobby.com/post/995209/thread