the oldest rock we observed there is 5.5 million years old, and it's all volcanic rock, now the oldest rock we observed on the big island is about 7 hundred thousand years old, we also know, we also know that the pacific plate, you could look at this diagram right over here is moving in this general direction, like we know it from, we know it from gps measurements, is moving exactly in the direction, that the hawaiian islands are kind of distributed in.