PEER ASSISTED STUDY SESSIONS Facil: Rachel Canham Course: GEOG 1010A Date: _Nov/Dec 2015 Week: __11___ Email: [email protected] Office: 408 MacOdrum Library Office Hour: Thur 3-­‐4 Opener: Weekly high and low 1. The Great Glacier Sorting: Step 1: match the key words to the definitions Step 2: Sort the key words into the following categories: Erosional & Depositional Features Step 3: Now sort the new Erosional & Depositional deck into Alpine and Continental features: Mountain/Alpine Glacier Landforms Erosional Cirque Bowl shaped depression formed by headwall erosion plus rotational flow of ice Arête Knife-­‐like ridge of land between valley glaciers Hor U-­‐shaped valley 3-­‐4 sided pyramidal mountain peak A valley carved out by a glacier into a more rounded/wider shape Where a smaller tributary glacier once flowed into a deeper, main glacier.s usually a waterfall here. Depositional Moraine Glacial erratics Valley train deposit Glacial deposits of unsorted, unstratified material. (medial, lateral, end) Rocks that have been dropped far away from where they came from and don’t match the local geology Glacio-­‐fluvial deposits of sorted, stratified deposits, braided streams Continental Glacier Landforms Erosional Rounded topography Drainage topography shape resulting from being run over by a huge continental glacier Roche Moutonee An eroded piece of bedrock that has been plucked on one side and abraded on the other side. Abraded side points in the direction of glacial movement. Outwash plain Depositional Till plain (ground moraine) Drumlins An area of stratified drift featuring stream channels An area of unstratified drift behind the terminal moraine Teardrop shaped hill composed of glacial drift. The pointy part indicates direction of glacial movement. Esker Sinuous ridge of till left in the shape of the river which ran under the glacier. Kettle Depression (usually filled with water) left by a melting ice block that fell off a retreating glacier. Kames Hills of glacial till which fell through holes/crevasses in the glacier. (Like a pile of sand from a funnel) 2. Label that diagram! What are the 4 types of permafrost and where can they be found on the map below? Label the following in the diagram below: open talik, closed talik, discontinuous permafrost, continuous
permafrost and active layer
3. Question Time
a. Other than temperature what causes permafrost to aggrade, degrade, or remain at equilibrium?
b. What does the Southern limit of continuous permafrost coincide with?
c. Where is discontinuous permafrost absent?
d. What processes are largely responsible for surface morphological properties?
e. How are pingos formed?
f. How are ice wedges formed?
4. Glacial landforms slideshow 5. Kahootz! 6. Closer: write one question that you would like to appear on the mock final exam on a piece of paper and hand it in as your ticket to leave DISCLAIMER: PASS worksheets are designed as a study aid only for in PASS workshops. Worksheets may contain errors, intentional or otherwise. It is up to the student to verify the information contained within. PLEASE NOTE: THIS HANDOUT IS NOT TO BE DISTRIBUTED.