During the Lower to Middle Ordovician, the Earth was very warm and wet. During the Upper Ordovician, massive glaciers started to form near the South Pole, causing a drop in the ocean levels and the overall climate began to cool.
The Cambrian Period was generally warm, wet and mild. As there were no continental landmasses located at the poles, ocean currents were able to circulate freely, hence there was no significant ice formation. As a result temperatures worldwide were mild.'
Source(s):http://www.palaeos.com/Paleozoic/Cambria…http://www.scotese.com/ecambcli.htm
In The Cambrain Time Period It Was Hotter Than The Sahara Desert.......:/
Which Is Very Hot For That TIme.....................
The weather in the Ordovician Era was very damp weather, but also, as the era continued, it grew relativley warm.The sudden change in weather caused mass extinction. Then all of the microscopic animals began to show up.
Ordovician .
I have no idea what the oxygen levels were during the tertiary period!
Cambrain
qwety
The weather in the Ordovician Era was very damp weather, but also, as the era continued, it grew relativley warm.The sudden change in weather caused mass extinction. Then all of the microscopic animals began to show up.
The Silurian period.
Ordovician .
Ordovician Period
copper
I have no idea what the oxygen levels were during the tertiary period!
The Ordovician Period
Cambrain
Ordovician period
Ordovician Period
Ordovician Period
qwety