DH and I just watched a program that stated, some time in the past, earth was completely covered in ice for about 25 million years. Then volcanos erupted and spewed out carbon dioxide, a greenhouse gas, and the atmosphere warmed up again melting the ice.
What I want to know is why weren't there any volcanic eruptions during those 25 million years of ice age?
What I want to know is why weren't there any volcanic eruptions during those 25 million years of ice age?