"Warm, equable climate" are key words which allow us to pry open the subtle deception which has been crafted as a way to break down Noah's flood into small units, and then spread them across time.
Warm, Equable Climate Again
The Old Red Sandstone
Is there any Biblical basis to support the possibility that billions of tons of sediment could fall out of the sky? Why yes, there is. There are several passages which describe rocks falling from the skies.
Extensive Inundation of Continents
As if "heavy rainfall and aridity" wasn't a clue, then what better description of a world-wide flood could there be than "extensive inundation of continents"? That's what happens in a world-wide flood.
Brachiopods
Brachiopods aren't an evolutionary dead-end which got wiped out in a mass extinction. Well, there was a mass extinction, but it didn't wipe out the Brachiopods. Many were buried in Noah's flood but many alive today.
Low-lying Continents with Some Epicontinental Flooding
"Low lying continents with some epicontinental flooding". That's how you describe a world-wide flood without saying the words "world-wide flood."
Mild Climates
We're already seen the descriptions of the Cambrian and Ordovician start with a statement on climate. It's a subtle way to pay homage to the fact that a vast amount of water moved a vast amount of sediment.
First Vertebrates and a Great Variety of Marine Invertebrates
In Noah's flood the sea floor was buried first, that's called the Cambrian. The things which were swimming just above the sea floor got buried next, that's called the Ordovician.
Warm, Epicontinental Seas, Again
Epicontinental seas supporting an abundance of green and red algae. What's the difference between Cambrian and Ordovician? The Cambrian is the sea floor, the Ordovician is the open ocean immediately above it.
Warm, Mild Climates
Erosion happens as the result of precipitation and flooding. “Warm, mild climates” is a way of implying that warm temperatures caused increased evaporation from the oceans.
Antediluvian Global Warming
Noah spent about 100 years building the ark. He preached to the people of his day to warn them about the impending flood. He thought that he was building the ark to save people. They thought that he was off his rocker.