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: An Indonesian Odyssey television series Ring of Fire. Cut from 80 hours of 16mm film in co-production with WGBH-TV, Boston, RING OF FIRE was produced, directed and photographed by Lorne Blair and co-produced and written by Lawrence Blair. Executive producer was Frontline's David Fanning. Ring of Fire: An Indonesian Odyssey The Ring of Fire: An Indonesian Odyssey is a series of five documentary films following the decade-long Wanderjahr of the filmmaker/sibling partnership Lorne and Lawrence Blair. With financing from investors including the BBC and Ringo Starr, the Blair Brothers arrived in Indonesia from England in 1972. Then the Indonesian archipelago offered isolation for