Circum-Superior Belt event in Australia and 1,860 million year old magmatism of the Mashonaland event in Africa. The other questionable suggestion related to the Circum-Superior Belt is the existence of a suggested 1,900 million year old global superplume event. The long Labrador Trough, extending from Ungava Bay through Quebec and Labrador, includes two volcano-sedimentary series, the first ranging from 2,170 to 2,140 million years old and second ranging from 1,883 to 1,870 million years old. This magmatism is considered to have formed as a result of back-arc volcanism. The youngest magmatic series (1883-1870 Ma) contains 1,880 million-year-old carbonatites and lamprophyres. 1,883 to
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