cretaceous period
DESCRIPTION
Cretaceous Period. 145-65.5 million years. Plant life. Flowering plants (angiosperms) appear Grasses appear. Marine life. Diatoms: Eukaryotic algae plankton Modern Sharks Mosasaur : Marine Reptile. Terrestrial Life. Dinosaurs Dominate. Terrestrial Life. - PowerPoint PPT PresentationTRANSCRIPT
CretaceousPeriod
145-65.5 MILLION YEARS
PLANT LIFE• Flowering plants (angiosperms) appear• Grasses appear
MARINE LIFE• Diatoms: Eukaryotic algae
plankton • Modern Sharks
• Mosasaur: Marine Reptile
TERRESTRIAL LIFEDinosaurs Dominate
TERRESTRIAL LIFELets peak in on the
Mammals Early Cretaceous Late Cretaceous Marsupial Mammals Placental Mammals
CREEPY, CRAWLY LIFE• 1st Butterflies• 1st Bees
• Ants, termites, aphids, and
grasshoppers
WHAT DOES IT LOOK LIKE?
Pangaea Has
TotallySplit
WHERE DO THE DINOS GO?• K-T Extinction Event
(K is for CretaceousT is for Tertiary)
• 2nd Largest Extinction Event in historySurvivedSeverely Affected Extinct
Ferns Diatoms 85% of all lifeSeed Producing Plants Brachiopods DinosaursMammals MollusksPterosaursBirds Fish IchthyosaursTurtlesPlesiosaursCrocodilesLizardsSnakesAmphibians
•
• Meteor Impact?• Disease?• Volcanism?• Glaciation?• Combo?
PICTURE IT