Is Oceans only began to form near the end of the geologic period?

Oceans began to form much earlier in Earth's history, not just near the end of any geologic period. The formation of oceans is believed to have started over 4 billion years ago, shortly after the planet itself cooled enough for water to exist in liquid form. This early ocean formation occurred during the Hadean and Archean eons, laying the foundation for the development of life and the evolution of the Earth's atmosphere.