Unit 4: gallery walk slides

Source: http://www.ncdc.noaa.gov/paleo/slides/slideset/11/11_178_slide.html

Ice cover during the Last Glacial Maximum (LGM)

http://www.splashcos.org/images/european-continental-shelf-maximum-extent-red-exposed-land-20000-years-ago?size=_original

During the Last Glacial Maximum (LGM), sea level dropped 120 m. As a result, shallow areas of the ocean became exposed (shown here in red).

Wikimedia Commons: Post-Glacial Sea_Level.png (Robert A. Rohde)

POST-GLACIAL CHANGE• As ice sheets melted away in the later stages of the Last Glacial Maximum and during the

early part of the Holocene (our current warm interglacial time), sea level rose.• Sea level reached a point close to the present level about 8,000 years ago.

http://earthobservatory.nasa.gov/Features/BorealMigration/boreal_migration2.php

http://emvc.geol.ucsb.edu/2_infopgs/IP2IceAge/aDeglacNoAm.html

FJORDS & ESTUARIES

http://rsgs.org/exploring-geography/rsgs-collections/

Geologic evidence of times when sea level was higher than present – raised beaches in Scotland.

Isostatically raised beaches near Pointe Aux Chenes, Lake Michigan, about 10 miles northwest of St. Ignace, MI. View is to the southeast.

Image Courtesy Louis Maher (University of Wisconsin); Image source: Earth Science World Image Bank http://www.earthscienceworld.org/images

http://www3.villanova.edu/conferences/biogeomon/trips.html