Mesozoic era
<div>MESOZOIC ERA</div><div> Is from 230 million of years ago to 65 million of years ago.</div>
<div>TRIASSIC PERIOD</div><div><br></div><div>TIME: Is from 230 million of years ago to 195 millions of years ago.</div><div><br></div><div>CLIMATE:</div><div>-The continental climate of Pangea was highly seasonal,were very hot summers and very cold winters.</div><div>-There is no evidence of any glaciation.The poles were apparently wet and temperate.</div><div><br></div><div>LIVING BEINGS:</div><div>-Life forms can be divided into 3 groups:</div><div> -Those who survived the mass extinction of the late Permian period.</div><div> -New groups that emerged in the Triassic but did not survive the extinction of the end of this period.</div><div> -And those who survived throughout the Mesozoic Era.</div><div><br></div><div>-MARINE LIFE: </div><div>-They appeared new types of coral.It increased the number of species of ammonites.There were several types of marine reptiles (Plesiosaurs, Ichthyosaurs).</div><div>-In the aquatic environment they highlighted molluscs, which considerably increased their number.</div><div>-At the end of the Triassic some groups of aquatic reptiles appeared.</div><div><br></div><div><br></div><div><br></div><div><br></div>
<div>JURASSIC PERIOD</div><div>TIME: Is from 195 million years ago to 145 million years ago.</div><div><br></div><div>CLIMATE:</div><div>-The rupture of Pangea had its climatic consequences.</div><div>-The climate became wetter and warmer.</div><div>-Increased sea levels, causing flooding of coastal lands and the creation of new seas.</div><div>-Some scientists maintain that some weather events were due to the massive appearance of methane coming from these abed.No evidence of glaciation.</div><div><br></div><div>LIVING BEINGS:</div><div>-At the top of the food chain were long-necked plesiosaurs, giant marine crocodiles, sharks and rays. </div><div>-Ichthyosaurs were shaped like fish, cephalopods looked like squid and ammonoideas had spiral-shaped shells.</div><div>-In the warm waters they rose coral reefs, sponges, snails and mollusks.</div><div>-Plankton floated free,and could cause some of the red ocean.</div><div>-On Earth dinosaurs had a great success.</div><div><br></div>
<div>CRETACEOUS PERIOD</div><div>TIME: Is from 145 million years ago to 65 million years ago.</div><div><br></div><div>CLIMATE:</div><div>-It increased sea level worldwide, flooding a large land area.</div><div>-Global warm weather.</div><div>-In the middle of this period, volcanic activity originates enormous basaltic oceanic plates.</div><div>-This causes the carbon dioxide in the atmosphere rises,causing a greenhouse.</div><div><br></div><div>LIVING BEINGS:</div><div><br></div><div>Dinosaursstill hadcontrol overEarth.This was the periodin whichthey obtainedbiggest boom.The mammalswerea smallandlimitedgroup of individuals withstatureless thanhalf a meter.</div><div>Among thedinosaurswho achieveda higher rate ofdevelopmentinclude:theherbivore sauropods,hadrosaurs(whoused to livein dampand marshyareas),ceratopsidsandfearsomeCarnotaurs.</div>

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