consequently, co2 levels at around 1,000 to 2,300 ppm were actually low enough to promote glaciation in the southern continent of gondwana.
consequently, co2 levels at around 1,000 to 2,300 ppm were actually low enough to promote glaciation in the southern continent of gondwana.
supercontinent:88
during the late ordovician (~458.4 ma), the particular configuration of gondwana may have allowed for glaciation and high co2 levels to occur at the same time.