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Cretaceous Period

Cretaceous Period. Members : Elan Reyes Steffani Zelaya . Geologic events. it belongs to the M esozoic Era ( 245 – 66 million years ago ) Continets move toward their position as south america splits from africa . Widespread volcanic activity occurs. Development of life.

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Cretaceous Period

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  1. CretaceousPeriod Members: Elan Reyes Steffani Zelaya

  2. Geologicevents • it belongs totheMesozoic Era ( 245 – 66 millionyearsago ) • Continetsmovetowardtheir position as southamericasplitsfromafrica. • Widespreadvolcanic activity occurs

  3. Development of life • Firstfloweringplantsappear. • Dinasours, includingTyrannosaurusrex, dominiate. • Firstsnakesappear. • Massextintion • Massextintion at end of period causes disappearance of manyland and marine lifeforms, includingdinasours

  4. Evolutionarychanges •Evolution in plantlife , specificallyflowerplantsrelatedtotheseappeared: Willow ,Elm ,Grape ,Birch ,Maple ,Grass ,SequoiaTree •Insects :a form of a dragonfly •Invertebrates: Nautilus ,Sea Urchins •Reptiles: Crocodiles, GiantTurtle •No Mammals in thisperiod •Terrestrialorganisms: arthropods(flies)

  5. Plantsanimals and otherorganisms • Paleontologists are constantlyfinding new information and artifacts .Theknowledge base growsallthe time. • •There are active digsitesaroundtheworldfinding new informationtostudyaboutplants and animalsfromtheCretaceousperiod.• • Amateurs findimportantantfossils and helptobringadditionalinformationtothescientists

  6. Climate and Geography • During the early Cretaceous period, the inexorable breakup of the Pangaean supercontinent continued, with the first outlines of modern North and South America, Europe, Asia and Africa taking shape. Conditions were as hot and muggy as in the Jurassic,

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