PPT-The Work of Glacial Ice

Unit 5 Gradational Processes Ms Thind Glaciers 10 of land is covered with glacial ice Store 75 of the worlds freshwater If all land ice melted sea level would rise approx 70m Glaciers importance. 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 and . Periglacial. Processes and Landforms. . Geosystems 5e. An Introduction to Physical Geography. Robert W. Christopherson. Charlie Thomsen. LAB #3. Assignment #3 (book report) is due next week!!. GEOL 2110. The Pleistocene Epoch. The Ice Age. Major Concepts. The gradual cooling evident in the mid to late Cenozoic reached a critical threshold which triggered extensive . glaciation. around 1.8 Ma. . 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. Chapter 12. Bao, Mario, Ariel, & Keiyro. 12-1 Project CLIMAP. CLIMAP (Climate Mapping and Predictions) Project began in early 1970s. First map of ice-age Earth released 1976. 12-1 First CLIMAP Map. Jonathan M. . Lala. December 1, 2016. CE 394K.3 GIS in Water Resources. Introduction. Himalaya Region contains more glacial ice and perennial snow than any other region on earth outside the polar regions. 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. . 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. 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. 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 Julia R. Hagemann. 1,3. , Frank Lamy. 1. , Helge W. Arz. 2. ,. . Lester Lembke-Jene. 1. , Alexandra Auderset. 3,4. , Naomi Harada. 5. , Sze Ling Ho. 6. , Shinya Iwasaki. 7. , Jérôme Kaiser. 2. , Carina B. Lange. 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.. Glacial transport . The image to the right shows the different ways in which material can be transported. Material that has been carried and deposited by the glacier is called moraine Different types of moraine .