Meso- means middle. Clearly something is different about Mesozoic sediment compared to Paleozoic and Cenozoic. Paleozoic was the deluge. Mesozoic was the period of time when the water remained high on the Earth.
Mesozoic/Middle Noachian (Inundation)
Continued Inundation of Low-lying Continents
"Continued inundation of low-lying continents?" That sounds like a world-wide flood. In fact, it's a way of saying world-wide flood without using the words world-wide flood. It's an ecosystem, not a period of time.
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.