The Hydrologic Cycle 3: Glaciers. Glaciers contain 76% of all the Freshwater on Earth!
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Transcript of The Hydrologic Cycle 3: Glaciers. Glaciers contain 76% of all the Freshwater on Earth!
The Hydrologic Cycle 3: Glaciers
Glaciers contain 76% of all the Freshwater on Earth!
Two Types of Glaciers:1) Continental Ice Sheets
A) Antarctica
Ice Shelf
B) Greenland
Antarctic Ice Sheet
Two Types of Glaciers:2) Valley Glaciers
What are Glaciers?
Highly compacted snow becomes glacial ice
Glaciers Move – Solid Ice Can Flow !
How do Glaciers Flow ?1) Basal sliding
How do Glaciers Flow ?2) Internal Plastic Flow
The Glacial Budget
Two Different Types of Glacial Landforms: 1) Erosional
Before Glaciation
Glaciation
Glacial Landscape
U – Shaped Valleys – near Sun Valley, Idaho
UD Geology Field Camp: West Chicago CreekU-Shaped Valley with Pater Noster Lakes
Cirque - Bowl Shaped Depression Carved By a glacierTarn – A small lake filling a Cirque.
Horns – Pyramid Shaped MountainsAretes – Linear Mountain Ridges
Dr. Goldman in the Grand Tetons, August 2000
Yosemite Falls:A Hanging Valley
How do Glaciers Erode Bedrock?1) Plucking
Roche Moutonee
How do Glaciers Erode Bedrock?2) Abrasion - Glacial Striations