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Atlantic Plain Province
This event occurred during the time of the dinosaurs or scientifically known as the Jurassic period.
the crust near the new boundary was very hot making it stand out a bit. once it was able too cool down the continental crust shrank and sank allowing sediment to star depositing on it. now it is covered in a thick layer of rock from that era.
this process has impacted earths topography and the depth of the Atlantic ocean -
interior Plains
this event occurred in the Pre- Phanerozoic era
the rocks were formed by continental collisions that lie underneath the north American region. t
this event had a geological impact because the continental collision formed the rocks of Ancient Craton of North America -
Colorado Plateau
this geological event occurred around the Triassic era
deposits of marine sediment began to decrease as terrestrial deposits increased. this caused large accumulations of dune sand
this is significant because before the Triassic era the Colorado plateau region was covered by tropical seas -
Columbia plateu province
this event occurred during the Neogene period
the Columbia plateau province was covered with one of the worlds largest flood basalts
this event is significant because after a volcanic eruption the Columbia plateau the lava was bale to flood out in only 1.5 years -
pacific mountain system
there is no estimated time when this event occurred
the pacific mountain system is said to be the most f=geologically young and tectonically active places in North America
this event is significant because the rugged and mountainous landscape was able to provide evidence for continuous mountain building