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: The Best of Johnny Cash Ring of Fire: The Best of Johnny Cash Ring of Fire: The Best of Johnny Cash is the sixteenth album in total by the singer-songwriter Johnny Cash, released on Columbia Records in 1963 (see 1963 in music). This album collects tracks from singles and an EP released between 1959 and 1963, Cash's first years on the Columbia label, and marked the first release of these tracks in LP format, with the exception of "I Still Miss Someone," which had previously appeared on the 1958 album "The Fabulous Johnny Cash". "Ring of Fire", one of Cash's most famous tracks, made its