That depends on which web site you go to.
biblicalscienceinstitute.com
Do "old earthers" then accept a Universal Flood really happened?That depends on which web site you go to.
Young Earthers claim it was from the flood.
Overview of Geologic Evidence of the Flood | Biblical Science Institute
Old Earthers claim it was from erosion of the Colorado River.
Why not? After all, the entire world was underwater until God raised up the continents and divided the land from water, forming the oceans.
