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GEOLOGIC TIME GEOLOGIC TIME Time scale app? Time scale app?

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GEOLOGIC TIMEGEOLOGIC TIME

Time scale app?Time scale app?

PRECAMBRAINPRECAMBRAIN Longest eraLongest era Earth was inhospitableEarth was inhospitable

Still coolingStill cooling No atmosphereNo atmosphere

STROMATOLITESSTROMATOLITES

Oldest known fossilOldest known fossil 3.5 billion years3.5 billion years cynobacteriacynobacteria Began producing Began producing

oxygenoxygen Simple cell- no nucleusSimple cell- no nucleus

PALEOZOICPALEOZOIC

Life flourishes in the Life flourishes in the oceanocean

Trilobites dominate eraTrilobites dominate era

CambrianCambrian

Multi-cellular life in seas beginMulti-cellular life in seas begin First shellsFirst shells

OrdovicianOrdovician

First fishFirst fish

OrdovicianOrdovician

SILURIANSILURIAN

First land plantsFirst land plants Fern-likeFern-like

Sea life continues to Sea life continues to flourishflourish

ammonite

DEVONIANDEVONIAN

Fish/ sharksFish/ sharks First insects appearFirst insects appear

CarboniferousCarboniferous(Mississippian & Pennsylvanian)(Mississippian & Pennsylvanian)

swampyswampy Huge insectsHuge insects Eventually created coal Eventually created coal

depositsdeposits

PERMIANPERMIAN

ReptilesReptiles First amphibiansFirst amphibians Life in sea and land Life in sea and land

thrivingthriving

MASS EXTINCTIONMASS EXTINCTION

THE GREAT DYINGTHE GREAT DYING

80% of species went extinct!80% of species went extinct!

What happened?What happened?

Climate got hotterClimate got hotter Siberian trapsSiberian traps

volcanoes = COvolcanoes = CO22

MESOZOICMESOZOIC

Dinosaurs now dominateDinosaurs now dominate PANGEA is formedPANGEA is formed

TRIASSICTRIASSIC

Beginning of dinosaursBeginning of dinosaurs Many smallMany small Primitive mammalsPrimitive mammals

JURASSICJURASSIC

Dinosaurs get biggerDinosaurs get bigger First birdsFirst birds

ARCHAEOPTERYXARCHAEOPTERYX

CRETACEOUSCRETACEOUS

Intelligent dinosaurs (T-Intelligent dinosaurs (T-rex, raptors)rex, raptors)

First flowering plantsFirst flowering plants Carnivorous mammalsCarnivorous mammals

MASS EXTINCTIONMASS EXTINCTION

K/T BOUNDARYK/T BOUNDARY

Dinosaurs go extinctDinosaurs go extinct

Asteroid theoryAsteroid theory

Asteroid caused climate changeAsteroid caused climate change 11stst- dust blocked out sun- dust blocked out sun 22ndnd- trapped in heat- trapped in heat

Evidence for asteroid theory?Evidence for asteroid theory?

CraterCrater IrridiumIrridium

Found in space rocksFound in space rocks Shocked quartzShocked quartz

CENOZOICCENOZOIC

Mammals dominate- Mammals dominate-

TertiaryTertiary

MammalsMammals First hominoidsFirst hominoids

ArdiArdiArdipithecus ramidusArdipithecus ramidus

4.4 my4.4 my

LucyLucy

3.5 my3.5 my Bipedal hominidBipedal hominid

LucyLUCYLUCY

QUATERNARYQUATERNARY

ice ages ice ages Mammoths/mastodonsMammoths/mastodons NeanderthalsNeanderthals

presentpresent

When will a new geologic time period start?When will a new geologic time period start?

resourcesresources

http://universe-review.ca/R10-19-animals.htmhttp://universe-review.ca/R10-19-animals.htm