New answers tagged continent
3
The closing of the Isthmus of Panama alone did not trigger the beginning of the Ice Age, but it is a potentially decisive step on the way of ice shield build up in the north.
The development that leads to the current Ice Age, per definition a phase in earth's history were polar and continental ice shield build up, starts much earlier. Cooling began after a ...
2
Pretty much, because the joining of the Americas caused a shift in the circulation of the oceans. Because before, there was no antarctic circumpolar current (ACC), but there was a current (maybe more) going north to south, distributing heat to the Antarctic. The closing of the isthmus caused that current to disappear, and create the ACC and the Weddel ...
Top 50 recent answers are included
