Era dating articles
Three of the five largest mass extinctions in Earth history are associated with the Mesozoic: a mass extinction occurred at the boundary between the Mesozoic and the preceding Paleozoic; another occurred within the Mesozoic at the end of the Triassic Period; and a third occurred at the boundary between the Mesozoic and subsequent Cenozoic, resulting in the demise of the dinosaurs.rifting during the Late Triassic.
This separated Pangea into the continents of Laurasia and Gondwana.
During the Middle Jurassic, North America began pulling apart from Eurasia and Gondwana.The fauna and flora of the Mesozoic were distinctly different from those of the Paleozoic, the largest mass extinction in Earth history having occurred at the boundary of the two eras, when some 90 percent of all marine invertebrate species and 70 percent of terrestrial vertebrate genera disappeared.At the start of the Mesozoic, the remaining biota began a prolonged recovery of diversity and total population numbers, and ecosystems began to resemble those of modern days.(.) The major divisions of the Mesozoic Era are, from oldest to youngest, the Triassic Period, the Jurassic Period, and the Cretaceous Period.The ancestors of major plant and animal groups that exist today first appeared during the Mesozoic, but this era is best known as the time of the dinosaurs.
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Mesozoic Era, second of Earth’s three major geologic eras of Phanerozoic time.