Definition:
The Last Glacial Maximum occurred about 20,000 years ago (or more specifically between 24,000 and 18,000 years BP) during the last phase of the Pleistocene Epoch, when the global sea level was some 125 meters lower than it is today, due to the sea water being locked up as glaciers and ice sheets, and having reached their maximum total mass during the last ice age. The climate was much colder and drier.
