Geological Time Scale
|
AGE
Millions of years |
ERA
|
PERIOD
|
NOTES
|
|
2
|
C
E N O Z O I C |
QUATERNARY
|
Ice ages. |
|
65
|
TERTIARY
|
Increased diversity of birds and mammals. | |
|
90
145 |
M
E S O Z O I C |
CRETACEOUS
|
Extinction of dinosaurs,various marine reptiles. Approximate age of sites along Carrot River near Pasquia Regional Park. Inland sea covered much of central North America for second half of the Cretaceous period. |
|
208
|
JURASSIC
|
Earliest birds | |
|
245
|
TRIASSIC
|
Earliest dinosaurs, mammal-like vertebrates. | |
|
290
|
P
A L E O Z O I C |
PERMIAN
|
|
|
363
|
CARBONIFEROUS
|
Coal swamps common. | |
|
409
|
DEVONIAN
|
First land vertebrates, earliest forests. | |
|
439
|
SILURIAN
|
||
|
490
|
ORDOVICIAN
|
Earliest fishes, first land plants. | |
|
545
|
CAMBRIAN
|
First animals with shells or other hard coverings. | |
|
PROTEROZOIC
|
For more information contact:
Pasquia Regional Park
Box 339, Arborfield
Saskatchewan, Canada
SOE 0A0
(306)768-3239 Fax: (306)769-8307
info@pasquia.com