Lab 10 Assignment_Online-completed

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Georgia State University *

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Geography

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Dec 6, 2023

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Lab 10: Glacial Landscapes GEOG 1113L – Introduction to Landforms Lab Name: Shtavia Yarwood I. Intro to Glaciers 1. How are glaciers able to move? a. Glaciers can move by rotational slip. 2. What causes glaciers to scour the surface of the land as they move? a. The thing that causes glaciers to scour the surface of land as they move is once the rock is burst apart, the stone fragments fall into the glacier. As the glaciers move abrasions happens it causes the rocks to scour the surface. 3. How does a glacier change the shape of a valley? a. Glaciers changes the shape of valleys by abrasion and plucking. 4. Smaller, weaker glaciers with less eroding power create valleys that sit above larger valleys, which are called what? a. These valleys are called hanging valleys. 5. When quarries fill with meltwater, this is called what? a. When this happens, it is called tarn. 6. What are erratic stones? a. Erratic stones are rocks and boulders that were carried down by glaciers.
II. Glacier Gallery Visit the Glacier Gallery link below and answer the following questions. Some questions require you to use Google. Link: https://edu.oggm.org/en/latest/gallery-app_en.html 1. Find an example of an ice cap in the Glacier Gallery. a. Write down the name of your example ice cap and key features defining this category of glacier. i. The name of the ice cap I chose is Puruogangri. The key features of ice caps are they are found in polar or subtemperate regions and an accumulation of snow. b. Now, search the web to find example ice caps in North America, in Iceland, on the Tibetan Plateau, and in Svalbard (Spitsbergen). i. North America: Labrador ii. Iceland: Vatnajokull iii. Tibetan Plateau: Guliya iv. Svalbard: Austfonna 2. Find an example of a glacier in the European Alps. a. How does your European Alps glacier differ from the ice caps you found above (Hint: Read the tabs explaining each type of glacier on the righthand side of the map.) ? i. The Aletsch glacier is different from the ice caps I named above because although they both accumulate snow glacier discharges into loses its mass by ablation that discharges into seas or lakes while ice caps snow is accumulated and exceeds ablation. b. Using some critical thinking, try to explain in a few words why there are no ice caps in the European Alps or in New Zealand. i. The reason is because European Alps and New Zealand have smaller glaciers and little ice covers compared to other places with glaciers. 3. Find a calving glacier in the Gallery. a. What sets these glaciers apart from the others? i. The characteristic that sets these glaciers apart from the others are how they are always surrounded by a body of water. They are considered to be water- terminating, so they end up in lakes, fjords, or the sea. b. Using information from the Gallery or a web search, explain why the response of calving glaciers (also called “tidewater glaciers”) to climate change might be very different from the response of other glaciers.
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