PPT-Did Humans Cause the Glacial Extinctions?

By Alex Bauman Do you think that humans are the sole reason for the extinctions Scientists Continue to Disagree Changes in habitat Hunting by humans Combination of both reasons Woolly Mammoths. Mass extinctions are global events characterized by unusually high rates of extinction The magnitude of these rates is usu ally unspecified but it is generally significantly higher than the rate of so called background extinctions that is extinc tio Glacial Erosion. As glaciers travel over land, glacial ice can erode the underlying bedrock.. This erosion can happen by:. Plucking. A. brasion. Plucking. This occurs when melt water at the base of the glacier freezes in cracks and fractures the underlying bedrock.. Document Name: THE GLACIAL HIST. & DEV. OF MI Requestor’s ID: Author’s Name: Alice Wilson Document Comments: Jennifer Daniels - Manuscript by S.G. Bergquist [P. 6A At end of document] out of. Chs. . 9 and 11 . of the text . . .. Prehistoric Cultures. Tim Roufs’ section ©2009. Class Slides Set. . 17A. Early Hominins. . Introduction . to . Early Hominins. . Australopithecus . garhi. Darin Erickson. Aaron Gaither. Project Goals. Time lapse imagery showing glacial transformation. Area change . Retreat distance. Link glacial retreat with increasing temperatures. Correlate temperature with glacial retreat. Very general images. What is with the . zig. . zag. ? . Has the earth cooling-shows really deep time!. Shows Cambrian Explosion period.. Mentions algae and eukaryotic cells.. Has all groups! Nice sense of how things evolved. Not straight hard to follow. Hard to tell . Unit 5: Gradational Processes. Ms. . Thind. Glaciers. 10% of land is covered with glacial ice.. Store 75% of the world’s freshwater. . If all land ice melted, sea level would rise approx. 70m . Glaciers: importance?. Ch 15: p 277-281. Glaciers:. Enormous masses of moving ice created by the accumulation and compaction of snow.. Powerful agents of erosion ~ have carved some of the most spectacular features on Earth’s surface. What is extinction? . Extinctions occur when the last individual of a species dies out. . Functional Extinctions occur when individuals remain but the odds of sustainable reproduction are low. i.e. the species is effectively extinct even though individuals remain. . By: Alex Bauman. Do you think that humans are the sole reason for the extinctions?. Scientists Continue to Disagree. Changes in habitat. Hunting by humans. Combination of both reasons. Woolly Mammoths. B. Landforms : an accumulation of till deposited by direct glacial action. Ground moraines are relatively level to gently rolling and are formed by the deposition of accumulated material beneath the Once . glacial ice exceeds a thickness of about 150 feet, the weight of the overlying ice causes . the . base of . the glacier . to become plastic and flow like a very viscous liquid. While the bottom ice responds as a plastic solid, the surface ice is very brittle. However, from the surface down to the top of the plastic portion of the glacier, the ice experiences a decrease in . GEO101. Spring 2023. Contents. Growth of glaciers in the Cenozoic Era. Glacial cycles. The astronomical theory for glacial cycles. Cenozoic Glaciers. Cenozoic era started cooling 50 million years ago.. Megafaunal. Extinction. Kelsey T. . Stilson. Cultural and Climate Revolution. Migrations change both humans and the ecosystem.. Novel System. Stepped Global Extinction Events. Barnosky. , AD; Koch, PL; .