I have no idea what the oxygen levels were during the tertiary period!
The weather was really tropical and warm because in that time it was lingered by an equator.
qwety
Yes, it is believe that there was a glaciation at the beginning of the ordovician, and posibly one nearing the end. It is generally thought to be a period of tropical temperatures, and high sea levels.
Mosses (Bryophyta).
Ordovician .
Fish first appeared in the Ordovician Period.
The Ordovician Period
qwety
Yes, it is believe that there was a glaciation at the beginning of the ordovician, and posibly one nearing the end. It is generally thought to be a period of tropical temperatures, and high sea levels.
Algae was the dominant plant of the Ordovician. There were little to no other plants (other then algae) during the Ordovician. In the Ordovician, the common types of algae were Stromatolites (Blue green algae), and Tetradium (Red algae).
Mosses (Bryophyta).
The Silurian period.
Ordovician .
The period during which life began to move on land was the Ordovician Period. It was during this time that evidence of plant spores from living fossils were found on land.
You might see volcanic action.
Fish first appeared in the Ordovician Period.
Ordovician Period
copper