-
Precambrian
-The presence of stromatolities indicates that shallow seas covered much of earth during intervals in this period.
-Nearly half of the valuable mineral deposits in the world occur in the rocks of this periods.
Number: 10 & 11 -
Cretaceaus
-First flowering plants appear - angiosperm
-Impact hypothesis - dinosaur mass extinction
Number 5 & 35 -
Jurassic
-Flying reptiles called Pterosaurs
-Whoa those dinos are gettingbig & dominate the land - lizard hipped and bird-hipped appear - carnivores and herbivores have arrived
Number 3 & 13 -
Permian
-Appalachian Mountains are created because of the collision of tectonic plates & savannahs form.
-Environmental change causes mass extintion of sea invertibrates as the seas retreat.
Numbers: 8 & 38 -
Triassic
-The ssquirrel sized dinosaur & the first forest dwelling mammals appear.
-Ichthyosaurs are living in the ocean, new invertebrates call ammonite develop. -
Carboniferous
-First amphibeans
-First lona plants -
Mississippi
-Early reptiles resembling and large lizards appear. -
Devonian
-Huge plants begin to develope, early anphebeans form
-Age of fishes, fish that can breath out of the water and spendtime on land form
Number: 31 & 37 -
Silurian
-Eurypterids (sea scorpions), sea stars and coral become more common.
-Vascular plants and animals, such as scorpions being envolve on land.
Number: 24 & 33 -
Ordovincian
- There is very little plant life during this period. -Colonies of tiny invertebrates call graotolities florished and vertibrates appear, fish didnt have jaws or teeth and their bodies were covered with bony plates. Number: 1 & 30
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Cambrian
-Trilobites appear.
-Shelled brachiopods appear -
Eocene
-Flying squirrels, whales and bats appear
-Worls wide temperatures drop about 4 degrees celcius. Numnbers; 17 & 25 -
Anthripocene
-Humans= mass extinctions of plants and animal species.
-This epoch began with the industrial age. 7 & 14 -
Holocene
-Moderm human developed agriculture and used tools made of bronze and iron.
-Ice age begins. -
Pleistocene
-Homosapien (modern humans) appeared & are hunters.
- Species that did not envolve to survive extreme cold
Number: 9 & 20 -
Pliocene
-Various species migrated between continents across land bridges.
-First modern horses appear
Number: 18 & 26 -
Miocene
-Antartic icecaps begin to form.
-Mediterranean Sea dries up and refills several times.
Number: 32 & 36 -
Oligocene
-Himalayas develop due to uplifting caused by the indian subcontinent an Eurasian continents colliding.
-Many early mammal become extinct, clams and snails flourish.
Numbers; 6 & 27
