Abstract
The most recent paleoecological data indicate that the last glacial maximum in North America occurred about 20,000 to 18,000 years ago. At this time, the continental ice sheets covered all of present-day Canada and extended a short distance into the northern tier of the Plains states in the western United States to about 48° north latitude. South of the continental ice sheets, there were valley glaciers in the higher elevations of the Rocky Mountains that reached their maximum advance at the same time as the continental glaciers. The Yellowstone Plateau in northwest Wyoming, southwest Montana, and southeast Idaho contained the largest mass of ice south of the continental ice sheets. Consequently, periglacial conditions affected climates, faunal, and floral resources over the entire Northern Plains area (see Porter 1988).
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
