"An undersea plateau in the Pacific Ocean that is bigger than Idaho first started forming with volcanic eruptions during the Cretaceous period (145 to 66 million years ago), and it is still growing today."
Live Science reports on the new research: https://flip.it/Hs6INU
Here's the original study: https://www.sciencedirect.com/science/article/abs/pii/S0012821X23005605