 The history of the microplate can be traced back to 1.4 million years ago, as evidenced by the trace of the southern triple junction ridge on the Pacific plate that constitutes the southern boundary of the Galapagos Microplate.At that time, the southern boundary of the microplate was then starting to form by an active hotspot located beneath the East Pacific Rise.The hotspot drifted from the Pacific Plate to the Nazca Plate approximately 1.2 million years ago and a seamount chain began to develop on the Nazca Plate.