North America was very different during the time of the dinosaurs,
sea-levels were higher, and large parts of the North American interior
were thus shallow seas, permanently underwater. The inhabitants
of these seas included
included strange marine creatures, unknown today, such as
as well as giant marine reptiles such as
Furthermore, the position of the continents was different too:
During the early part of the
North America was joined with all the other continents in one super-continent known
Pangaea begun to break up into two smaller super-continents:
Laurasia and Gondwanaland. North America was part of the northern
super-continent, Laurasia, which also included
Europe and Asia (except for India).
However, the very beginnings of the Atlantic slowly appeared, as
North America slowly begun to break-away from Europe.
Laurasia continued its break-up. The Atlantic eventually became
a wide ocean separating North America from Europe.
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