PPT-Glacial snout

Lateral moraine Braided streams Medial moraine Periglaciation Zones Peripheral to Glaciers Photo 2 Ice wedges polygons thermokarst lakes Photo 3 Collapsed Pingo closed system Photo 4. lfalfa snout beetle (ASB), Otiorhynchus ligustici , was brought to North America from Europe during the 1800s in shipping ballast and was first introduced in the Port of Oswego, New York. When a Glacial Ice. . 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 . 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.. Chapter 7.1. At one time nearly 30% of the earth’s surface was covered in ice. . . This . period of time was referred to . as the . ice age. .. Today. , only . 10% of the earth’s surface is covered in ice. Chapter 3: Changing Climates. The Big Freeze. A cooling trend began in the Cretaceous Period and continued throughout the Tertiary Period. By the end of the Tertiary Period (1.7 . mya. ) the climate became so cold that snow began o accumulate year after year in the Polar regions. 3. /. HO. x. ) Abundances. Glacial-Interglacial. Rapid Climate Change. Glacial.  .  . Model-based hypothesis: During large climate transitions, variability in the O. 3. /. HO. x. ratio is determined by . Deposition:. AIM:. Erosional and Depositional systems. Do Now: In your notebooks…. 1) Define the two terms below in your own words.. 2) Explain how the two terms work together.. The movement/transport of material from one place to another. 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] 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. Prairie School. Earth Science. Glaciers: Moving Ice. When you take a handful of snow and squeeze it, you are creating a product that is similar to that of glaciers. . Glacier: fast moving, large mass of ice. . 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?. Definition. Used with permission from Microsoft. 20,000 years ago. ~3 km thick. Crust deformation. Mantle flows away. The ice. Used with permission from Microsoft. Glaciers retreated. Slow uplift. Mantle returned. 12 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..