Quote from: robert on July 13, 2013, 03:20:01 AM
If a scrap of dry land was to be found around New York, it would've looked and felt like Hilton Head Island, climate-wise. But dry land was in scarce supply.
That's because a large section of what are now the states of Pennsylvania, New York, West Virginia, Maryland and Ohio lay submerged beneath a sub-tropical sea.
In fact, water covered most of the world. Fish were the "boss" life-form of the planet. Their only competition was primitive plant life on land.
This shallow ancient seaâ€"geologists refer to it as the Appalachian Seawayâ€"stretched from the Gulf of Mexico to upstate New York.
Keeping company with the fish in the briny depths were microscopic plankton. And as these plankton died, a massive layer of dead organic materialâ€"think of it as green slime or "organic road kill"â€"collected on the seabed.
For hundreds of millions of years this gooey substance piled up.
Then an epochal tectonic event occurred.

