The Biblical history of hell expanding has 9 eras that bring us to the present day. The Millennial Kingdom is the 10th.
The 10 Eras
August 25th
Deposition and lithification of sediment (Noah's flood), had to be before the formation of mountains which are composed of the sediment (Peleg's tectonics). That's an acknowledgement of the relationship of cause and effect
August 24th
The Miocene is the Miocene because it's the Miocene. Anything that's not characteristic of the Miocene is assigned to something other than the Miocene. It's a little microcosm of circular reasoning.
August 2nd
The fountains of the great deep were created on the third day as the dry land was spread out over the waters of the deep. 1,656 years later they burst forth, allowing Noah's flood to happen.
He Who Removes Mountains
This is Part of Job's response to Bildad. He's talking about tectonic upheaval. He was contemporaneous with Abraham, so only 200 or so years have passed since the tectonic breakup of Pangaea.
Nuclear Decay was Initially Rapid
If this doesn't scare you, I don't know what will. Hell is expanding. It's the cause of global warming. Science can't do anything about it. Jesus Christ is the only way to escape.