Temperature: 14 °C
Atmospheric oxygen: 32.5%

The name Carboniferous means “coal-bearing” and it is the period when all the major coal deposits formed. During the Early Carboniferous the Paleozoic oceans between Euramerica and Gondwana began to close, forming the Appalachian and Variscan mountains. An ice cap grew at the South Pole, and four-legged vertebrates evolved in the coal swamps near the Equator.




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