By Jakob Hamann Introduction: timescale and climate setting at the Last Glacial Maximum The Last Glacial Maximum (LGM) marks the coldest interval of the most recent glacial period, occurring between approximately 26,000 and 20,000 years ago. During this time, global temperatures were substantially lower than today, and large ice sheets reached their maximum extent across […]
Laurentide Ice Sheet at the Last Glacial Maximum Read More »
By Jakob Hamann Introduction Large parts of North America have been covered by glaciers and ice sheets in the past. Over roughly the last 2.6 million years – an interval known as the Quaternary Period1 – glaciers advanced and retreated repeatedly as climate shifted between colder and warmer conditions2. During colder intervals, ice sheets expanded
North American Glaciation Read More »
During the Quaternary Period, North America was covered by three ice sheets: the Cordilleran Ice Sheet, Laurentide Ice Sheet and Innuitian Ice Sheet. During the last glacial cycle, these ice sheets were the world’s largest ice masses, driving huge and important changes in global sea level, atmospheric and oceanic circulation, and influencing the movement and
Ice Sheets of North America Read More »
