Geoglic time periods
Periods+Precambrian earliest.
-1st organism single called oxygen present.
-later-multicelled organisums.
Cambrian 540 Mya.
-lots of different organisums.
-earliest animals with backbone.
-lots of carbon dioxide.
Ordovician 490 Mya.
-Lots of animals without skeleton.
-early shellfish,trilobites,nautilus,starfish+fish
-1st green plants fungi.
-end of ice age.
Silurian 443 Mya.
-1st advanced plants.
-jawed fish with armour.
-more shellfish.
Devonian
-1st ferns.
Moist climate cool
-1st fir trees with seeds.
-1st amphibians.
-some animals from earlier periods die out.
Carboniferous 354 mya
-swampy land.
-1st coal forest ( trees.
Coal over million of years.
-early sharks,large trees,.
-1st reptiles+vertebrates.
-trilobites disappearing.
- glaciers form.
-winged insects.
Permian 290 Mya
-land messes have formed I continent Pangaea
-glaciers disappear-warming up
-lots of reptiles
-1st cone bearing trees
-beetles and files
First dinosaurs appear
First mammals and crocodiles
Modern corals and fish
Triassic
248First dinosaurs appear
First mammals and crocodiles
Modern corals and fish
Jurassic 206 Mya
Lots of different dinosaurs
Ferns and cone bearing plants
Mammals common but small
First bird and lizard
Land mass,Pangaea breaks up into Gondwanaland and Laurasia
High,carbon dioxide levels
Cretaceous 144 Mya
Lots of dinosaurs including tyrannosaur
New types of insects
Flowering plants appears and become plentiful
Modern crocodile and sharks
Early birds appears
Gondwanaland breaks up
Rocky Mountains appears
Carbon dioxide similar to today
Paleogene
Modern plants
Lots of different mammals
Dinosaurs extinct
Primitive whales
First grasses
Rapid changes in mammals
Climate cools
ice age begins and during this period
Neogene
Modern climate
Modern mammals and birds
Horses evolve from dog like animals
Lots of grasses
First ape
Southern alps of nz appears
Quaternary 1.8 Mya present
Anatomically modern humans
Human Stone Age culture
Ice ages comes and go
Sahara forms from grassland
Humans begin agriculture
Stone Age ,Bronze Age 3300bc Iron Age 1120bc
Industrial revolution leads to rise in carbon dioxide levels