The first rain was a massive event, to say the least. Water surged and flowed across the broken surface of Earth. Great canyons and plains were created in hours. Mountain ranges rose as Earth's surface buckled. Basins of water formed, and filled, and became the great oceans. The springs of water were broken up. Water spewed out of the irrigation system God designed, creating great caverns under the earth. God had cursed the ground three times. This made the planet vastly different from Adam's first home.
(Genesis 7:11, 8:1-3, 3:17, 4:10-12, 5:29, 8:21)
God caused a great wind to blow. The wind blew the rotting flesh, of things before the flood, into piles, which became covered by earth and water. Subject to great heat and pressure, these piles formed coal, oil, natural gas, and many other mineral deposits. This stirring of the earth created the world we live in today. (Genesis 8:1-2)
God had removed early man from the earth. For Noah, his family and descendants, God had made a fresh start.
The dates of these events can be only speculated. I wasn't there. My history contains only those things I have seen, experienced, or believe to be true. Radioactive dating relies too heavily on assumptions of its own accuracy.
The physical world before the flood is not described in great detail in the Bible. The physical world after the flood we live in. The planet today, we can see and measure, as accurately as our sight and measurements will allow. The physical world of the future, its atmosphere and earth, we cannot predict either. Except for what is revealed in the Bible, about the world to come, it is unknown to us. Yet, all of us can see changes happening to Earth. Some of these changes are caused by us, many are beyond our control. At least God in Heaven can take care of the physical world.
Still, a lesson is to be learned. History, Science, Religion, and Common Sense make this clear, when something dies, it is gone. When a species is extinct, it is gone. When a man or woman, plant or animal dies, its presence is gone. If not for the promises of God, all life would face eventual extinction. But, God has promised, and has His purpose. He will soon keep His promise.
(2 Peter 3:3-18)