On the sea floor, around the North Sea and into the kilometre of sediments below, many traces and evidences of the glacial events are recorded.

The prairies were most recently affected by glacial events in the Quaternary period.

Over 11 major glacial events have been identified, as well as many minor glacial events.

A major glacial event is a general glacial excursion, termed a "glacial."

The Quaternary period is the most recent geological process when the prairies were affected by glacial events.

Currently, the world is existing in an interglacial period within a much older glacial event.

During the Ice Age period (about 2 million years ago) there have been 4 glacial events and between them, interglacial periods that were comparable to the present climate.

Hence, the distribution of forests and wetlands is very much a product of these past glacial events.

One of the possible causes for the end of this glacial event is during the glacial maximum, the ice reached out too far and began collapsing on itself.

Four major glacial events have been identified, as well as many minor intervening events.