What global climatic changes occurred late in the Eocene Epoch, and what were their causes?
1) Cold, deep waters mixed with and cooled shallower waters, decreasing global evaporation.
2) Global climates became cooler and drier, and grasslands proliferated.
3) Antarctica became sufficiently separated from Australia to allow formation of a cold circumpolar current, permitting glaciation.
4) Cold, dense waters descended from the poles to form the cold zone of the deep sea that persists to the present.
5) All of these