Circum-Superior Belt northwestern Superior craton margin intrude an older, 2,090 to 2,070 million-year-old dike swarm. The Ospwagan Group is younger than and the 1,864 million-year-old Winnipegosis komatiite belt lies to the southwest. Numerous tectonic settings have been suggested for triggering magmatism in the Fox River Belt, including a marginal basin rifting event. At the southern portion of the Circum-Superior Belt, a group of fragmental sediments composed of iron formation was formed during a period of magmatic activity in the Marquette Range Supergroup. Included in the Marquette Range Supergroup is the Hemlock Formation, a bimodal volcanic group that is estimated to have an
Ring of Fire (song) Ring of Fire (song) "Ring of Fire", or "The Ring of Fire", is a song written by June Carter Cash and Merle Kilgore and recorded by Johnny Cash. The single appears on Cash's 1963 album, "". The song was originally recorded by June's sister, Anita Carter, on her Mercury Records album "Folk Songs Old and New" (1963) as "(Love's) Ring of Fire". "Ring of Fire" was ranked No. 4 on "CMT's 100 Greatest Songs of Country Music" in 2003 and #87 on "Rolling Stone"'s list of The 500 Greatest Songs of All Time. In June 2014, Rolling Stone ranked the