The Hydrologic Cycle 3: Glaciers. Glaciers contain 76% of all the Freshwater on Earth!

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Presentation transcript:

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 Creek U-Shaped Valley with Pater Noster Lakes

Cirque - Bowl Shaped Depression Carved By a glacier Tarn – A small lake filling a Cirque.

Horns – Pyramid Shaped Mountains Aretes – 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