Circum-Superior Belt age of . Another volcanic series in the Marquette Range Supergroup, known as the Gunflint Formation, has an age of . Further geologic units that are related to the Gunflint Formation include the Badwater volcanics and the Kiernan sills. A number of origins have suggested for the Marquette Range Supergroup magmatism. This includes subsidence being driven ahead related to thrusting of the Penokean orogeny or a possible back-arc basin, and lateral flow through the Pickle Crow dikes transported magma from the Fox River Belt area through the Superior craton for placement in the Marquette Range Supergroup. This suggested long-range origin
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