CompuServe Messages

Jon >> To see where things have been _happening_, you have to look to the west of the Americas, and to the east coasts of Asia and Africa, and the northern and eastern coasts of Australia. IOW, places where plates are moving along each other, or are being subducted. The Rocky Mountains formed after the Atlantic opened; I think the Andes did too, as did Japan and all those Pacific islands that have volcanic origins. The rifting in East Africa is so recent that I think there's a chance it's still going on. << The most interesting and difficult crustal formations for me are those around north and east of Australia. The crust is in thin ridges..I bet they are a lot more massive under the visible areas. There are places like both sides of New Guinea and Fiji where the formation curls up. I am wondering about the volcanic Island arcs being tied to large curved fractures..for instance looking at the Elt NINN Fracture Zone system that arcs between The gap between S. America and Antarctic and goes west curving north there is a line of sea mounts starting with Louisville Ridge …that goes through the Tonga Trench and on to the Gilbert and Marshal Islands. What about this fracture – Island arc connection? Kamron