Preceden

Spinosaurus

Eras

Paleozoic

543000000 BC - 248000000 BC

http://ferrebeekeeper.files.wordpress.com/2010/11/ordovician.jpg[Wordpress](http://ferrebeekeeper.files.wordpress.com/2010/11/ordovician.jpg)

Mass Extinction

444000001 bc - 444000000 bc

Mesozoic

248000000 BC - 65000000 BC

http://everyhistory.org/7/41.jpg[Every History]()

Mass extinction

200000001 bc - 200000000 bc

half of all marine invertebrates. Around 80% of all land quadrupeds also went extinct

Asteriod

65000001 bc - 65000000 bc

Cenozoic

65000000 BC - present

http://www.real-science.com/wp-content/uploads/2012/03/woolly-mammoth.jpeg[Real Science]()

Periods of Paleozoic

!http://ferrebeekeeper.files.wordpress.com/2010/11/ordovician.jpg!

Cambrian

542000000 BC - 488000000 BC

Ordovician

488000000 BC - 444000000 BC

Silurian

444000000 BC - 416000000 BC

Devonian

416000000 BC - 359000000 BC

Carboniferous (Mississippian/Pennsylvanian)

359000000 BC - 300000000 BC

Permian

300000000 BC - 251000000 BC

Periods of Mesozoic

Triassic

251000000 BC - 200000000 BC

Jurassic

200000000 BC - 145500000 BC

Cretaceous

145500000 BC - 65500000 BC

Periods of Cenozoic

Paleogene (Paleocene/Eocene/Oligocene)

65500000 BC - 23000000 BC

Neogene (Miocene/Pliocene)

23000000 BC - 2588000 BC

Quaternary (Pleistocene/Holocene)

2588000 BC - Present

My Dino

Spinosaurus

145000000 bc - 65000000 bc

http://en.wikipedia.org/wiki/File:Spinosaurus1DBa.png[Wikipedia](http://en.wikipedia.org/wiki/File:Spinosaurus1DBa.png)