 Over time, the axis of the East Pacific Rise straightened and the triple junction began to migrate southward.The microplate is divided into two regions between north (Northern Galapagos Microplate) and south (Galapagos Microplate).The Galapagos Microplate is bounded by the Dietz volcanic ridge at 1°10'N, south of the Cocos-Nazca Ridge, and the Northern Galapagos Microplate (NGMP) is bounded by the Incipient Ridge at 2°40'N, north of Cocos-Nazca Ridge.