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 Studios Ring of Fire Studios Ring of Fire Studios is an award winning digital effects and design company located in Venice, California. Launched in 1996, the company focuses on commercial advertising work but also does visual effects, animation and pre-visualization for features, television, music videos and live events. Nike, GEICO, Adidas, T-Mobile, UPS, Mercedes and Bud Light are among their advertising clients, and some of the agencies they work with are Wieden + Kennedy, The Martin Agency, TBWA\Chiat\Day, Ogilvy + Mather, Goodby Silverstein & Partners and BBDO Worldwide. Ring of Fire has done feature film work for Warner Bros., Fox and