Name Date ES per Mr. Landsman Glacier Erosion Notes Erosion: the of weathered material. Glacier: A large mass of ice and snow that exists year-round and moves under the influence of. Evidence for Glacier Erosion.Erosion by Ice 1. : A large rock (boulder) that is a different rock type from the local bedrock.a glacier dropped it there. 2. : Different sized rocks all mixed together, unsorted. Example: 3. : Chatter marks or parallel GROOVES in the bedrock. The scratched show the direction of ice movement. Caused by 4. : Smooth polished bedrock surfaces. How Glaciers Form 1. COLD summers the winter snow does not melt, it just piles deeper and deeper 2. May be located at HIGH (above snow line) or HIGH (near polar regions) Buried snow gets compacted to form and eventually becomes GLACIER ICE.
Two major types of glaciers: 1. : a glacier high in the mountains that fills in the valleys and flows downhill. The ice scrapes away at the of the mountains and the peaks. Type 1: VALLEY GLACIERS Before During After
Valley/Alpine Glacier Landscapes 1. Cirques semi-circular basins (bowls) found at the top of the glacier valley. 2. Arete a steep SHARPENED peak between parallel glacier valleys 3. Tarn a lake within a cirque 4. Horn a pyramid-shaped sharp high peak formed where several glaciers begin 5. Hanging Valley a vertical wall formed where a tributary glacier joined a larger glacier. This will often be the site of a waterfall. 6. U-shaped Valley alpine glaciers convert former V-shaped stream valleys into U- shaped troughs
Moraines: Piles of TILL that are deposited directly by glacier ice. Moraines are composed of mixed sizes of rock and the sediment is not layered. TILL is and. Summary Mad-libs: Valley Glaciers Glaciers are large masses of that move due to the pull of. (noun, frozen water stuff) (a force that pulls down on EVERYTHING) Glaciers leave behind evidence in the rocks and in the. (a student called me this once ONCE) Bedrock marked by a glacier may have or (vocab for parallel scratches), or be smoothly. ( like in a toilet) (adjective, NOT a person formerly from Poland) Alpine or glaciers leave behind features in the landscape. The peaks are and the valleys have a -shape. (adjective) (a letter in the English alphabet, just after T ) Long piles of till that are and un-stratified (vocab for mixed particle sizes) are called. (many examples on the top of this page)
Type 2: Continental Glaciers A.K.A Very old and very sheets of ice that cover large areas of land and oceans. Current Ice Sheets: and. Continental Glaciers flow from toward the. Cool Fact when ice sheets are melting at their southern edge, big pieces of ice fall off into the ocean. This is called Calving. ICE AGES: Historically, cold periods on the Earth have resulted in ICE AGES. Ice sheets advance from the north because the snow DOES NOT MELT in summer. The ice flows south, and was even RIGHT HERE in NYS. Ice sheets during ice ages and during inter-glacial periods (like now). Fact 1: When glaciers FLOW faster than they MELT, the ice front ADVANCES. Fact 2: When glaciers MELT faster than they FLOW, the ice front RECEDES. Write a math sentence to express facts 1 and 2 Long Island and Cape Cod have that were left behind by the retreating ice at the end of the recent ice ages.
Continental Glacier Features and Deposits: A: Ice Front: the front of the ice B: Drumlin: A long inverted-canoe-shaped hill of till, usually found in groups, that point in the direction of ice flow. C. Kettle Lake: a lake formed by a buried block of calved ice that has melted and created a depression D. Esker: a long strip of sediment that is deposited by rivers of melt-water running out the ice front. E. Kame: a cone-shaped pile of SORTED, STRATIFIED sediment deposited by rivers of meltwater running along the TOP of the glacier and plunging down the ice front onto the ground. F: Outwash/Outwash Plain: a region BEYOND the farthest extent of the ice front composed of SORTED and STRATIFIED sediment deposited by MELTWATER. G. Terminal Moraine: a long pile of till deposited at the farthest extent of the ice front.
Summary Mad-libs: Continental Glaciers Continental glaciers, also known as form in polar regions and advance during and retreat during periods. Continental glaciers flow from the where it is mad cold. Glaciers ADVANCE when the ice is faster than it is. Glaciers RETREAT when is faster than the ice is. Continental GLACIER ICE leaves behind UNSORTED TILL that forms features such as, and. Continental glacier MELTWATER forms deposits such as,, and a flat region of sorted deposits called an plain. The Venn-Diagram of Glaciers
Name