Circum-Superior Belt mantle plume that was the source for the 1,880 million-year-old magmatism in the Circum-Superior Belt. The Circum-Superior Belt is the host for widespread mineral deposits, including copper, nickel and platinum group elements. However, the origins of this widespread mineralization is unknown. The Thompson Belt in Manitoba is one of the most comprehensive nickel producing zones on Earth. It has the potential to contain platinum group elements, but the age of the mafic-ultramafic volcanic rocks comprising the nickel deposits are not well known. Since its foundation during the 1950s, numerous mining operations throughout the Thompson Belt have produced over four billion
Ring of Fire II re-reading the other novels and anthologies of the series to "really appreciate all the interconnections between the various storylines". Ring of Fire II was listed on the Locus (magazine) Hardcovers Bestsellers List for single month during 2008 at number 6. Ring of Fire II Ring of Fire II is a 2008 anthology created by editor-author-historian Eric Flint. It is the second anthology in the 1632 series following after "Ring of Fire" (2004). The initial Ring of Fire book was a notable departure in that it heralded a new era in writing series fiction by being set in an authors' milieu