Individual island pairs have likely been repeatedly subaerially connected for short intervals since that time.
Darin M. Schwartz, S. Adam Soule, V. Dorsey Wanless, Meghan R. Jones 2018, 'Identification of Erosional Terraces on Seamounts: Implications for Interisland Connectivityand Subsidence in the Galápagos Archipelago', Frontiers in Earth Sciencehttps://www.frontiersin.org/article/10.3389/feart.2018.00088/full. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)