Geoglic time periods

                               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

Triassic 

 248
First 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 

Triassic and Jurassic

                                            Jurassic

                           

                       

                                              Trassic

Where does nz fit into the theory of continental Drift?

Using the theory of continental drift explain the following: (note -you will need to think of the way the land masses were placed and how they have moved.)

1.why does nz not have any crocodiles?

2.why is nz only mammals a bats?

3.no evidence of woolly mammoths in explain why?

4.wetas and tuataras are living fossils. What does this mean? Suggest why we ah e these cure creatures but Australia does not.