The Earth was flooded for about a year, including the 40 days of rain. Sediments were deposited which were later eroded, metamorphosed and lithified as the waters subsided.
Cenozoic/Upper Noachian (Subsidence)
August 23rd
The Oligocene, an epoch in the geological timescale, is actually an ecosystem of plant and animal communities which has been destroyed, transported and buried in a world-wide flood.