Fossils
By Mady Smith
How is a fossil made?
Types of fossils.
Cast fossils- formed when a mold is filled in
Trace fossils- ichnofossils
True form fossils- fossils of the actual animal or animal part
Guaranteed to Give You Knowledge About Fossils
Ages of Fossils
Cambria- Dated back to a few tens of millions of years ago. Some fossils were Marella Splendens, Emeraldella, Kuamaia Lata
Ordovican- Dated between 443.7 and 1.5 million years ago. Some fossils were Stromatolites, Cupulocrines, an Porocrines Crinoids
Silurian- Sea creatures, Euryptenus Remipes, Spirograptus Graptolite
Devonian- Dated to about 365 million years ago. Some fossils were Palaeospondylus Gunni, Fovosites Turinatus, and Coral Fossils.
Carboniferous- Dated between 360 and 286 million years ago. Some fossils were Rayonnoceras Solidiforme and Lepidodendron Mannabachense.
Permian- Dated between 440 and 410 million years ago. Some fossils were Glossopteris sp and Eryeps Megaacephalus.
Triassic- Dated between 245 and 208 million years ago. Some fossils were Ichthyosaur and Keichousaurus Hui.
Jurrassic- Dated between 208 and 146 million years ago. Some fossils were Agathis Jurrassica Plant and Craspedites Nodiger Ammonite.
Cretaceous- Dated between 146 and 65 million years ago. Some fossils are the Tyrannosaurus Rex and Dragon Fly.
Teritary- Dated between 65 and 1.8 million years ago. Some fossils were Baltic Fossil Amber Dipterans and Ginko Aduantoides Plant.