Plate boundary reorganization at a large-offset, rapidly propagating rift

A large-offset propagating rift in the spreading area of Pacific-Nazca ridge between the Easter and Juan Fernandez microplates reorganizes the plate boundary geometry. A 120 x 120 kilo meters overlap zone exists between the dual active spreading centers due to the fast duelling propagation. This overlapping system is the precursor of a new microplate. There are marked differences between the fossil overlap zones and the present overlap zone.