GLORIA Investigation South and East of the Easter Microplate

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The plate boundary between the Easter and Juan Fernandez microplates appears to have the fastest known spreading rate on East Pacific Rise. The lack of transform faults suggests that a possible threshold spreading rate above which the classic spreading center/transform fault configuration is not stable. A proposed GLORIA/hydrosweep survey of this area will determine its present geometry and its tectonic evolution over the past 4.8 m.y.