A2 Glacial Deposition. Glacial Deposition TODAY.

Slides:



Advertisements
Similar presentations
Wisconsin: Physical History. Wisconsin Ice Age 110,000 to 12,000 years ago Most recent advance of North American Laurentide ice sheet Several miles thick.
Advertisements

GLACIAL LANDFORMS SHAPE MOUNTAINS
Chapter 13: Glacial Processes, Patterns and Associated Landforms
Glaciation of Canada.
Features of Glacial Deposition
Glaciers and Glaciation Physical Geology, Chapter 22.
Form in high mountains where snow accumulates to sufficient depths so that it is compressed, compacted and recrystallized. For this reason glacial.
Glacial Geomorphology Lab 10. Concepts Glacier Formation Accumulation and Ablation, Sublimation Movement Glacial Mass Balance Categories of Glaciers Where.
Landforms Resulting from Fluvio Glacial Deposition What happens when the glacier melts?
What is a Glacier? REVIEW = An accumulation of compacted snow & ice
Charity I. Mulig.
Glaciers.
Glaciers- Important in understanding global scale climate change Related to all 5 of the Earth’s systems Exosphere- changes in the amount of sunlight.
 As glaciers travel over land, glacial ice can erode the underlying bedrock.  This erosion can happen by:  Plucking  Abrasion.
Day #2-Processes That Shape Ocean Basins and Drainage Section 2.3.
CHAPTER 5 HONORS EARTH SCIENCE
Fluvio-Glacial Landforms. Fluvio-glacial landforms are landforms molded by glacial meltwater. There are 2 main fluvio-glacial features; 1)Outwash Plains.
GLACIERS CHAPTER 5 HONORS EARTH SCIENCE. What is a glacier? a thick mass of moving ice
Chapter 5: Section 2 Surface Processes and Landscapes
Glacial Depositional Landforms Types of moraine and drumlins.
An Introduction to a Powerful Force That Has Shaped the Earth.
Glaciers.
Glacial arete and col. drumlin valley glacier and medial moraines.
GLACIERS What is a glacier? Large volume of ice on land Doesn’t melt in the summer Ice moves and flows with the pull of gravity What does it take? Very.
Glaciers Moving Ice Formation of Glaciers A glacier is defined as a mass of moving ice. A glacier is defined as a mass of moving ice. There are several.
SIHC - Glaciation. Glaciation Erosion by bodies of moving ice.
Ch 15: p  Enormous masses of moving ice created by the accumulation and compaction of snow.  Powerful agents of erosion ~ have carved some.
Glaciers Glaciers formed much of the landscape that exists presently in the northern United States and elsewhere in the world. Glaciers Today, scientists.
GLACIERS AND GLACIATION. GLACIER A body of ice Formed on land Recrystallization of snow=> Firn => Ice Evidence of movement Alpine (valley) glaciation.
Glacier Notes.
Guided Notes For Glaciers Section 8.3. Glaciers shape the landscape by eroding, transporting, and depositing huge volumes of rock and sediment.
Geologic Features of Glaciation
Glacial Landscapes Glacier = large moving mass of ice. Glacier = large moving mass of ice. Glaciers erode, transport and deposit massive amount of sediment.
Mysterious rock formations…….. What could have caused these formations? GLACIERS!!!!!
LITHOSPHERE LANDSCAPE FEATURES RESULTING FROM GLACIAL AND FLUVIOGLACIAL ACTION Glacial Action by iceFluvioglacial Action by Meltwater Erosion Deposition.
Continental Claciation
GLACIERS AND GLACIATION. GLACIER A body of ice Formed on land Recrystallization of snow=> Firn => Ice Evidence of movement Alpine (valley) glaciation.
Glaciers.
LITHOSPHERE GLACIATION 1 Lesley Monk Balfron High School Session 2005/6.
Glaciers We wouldn’t be here without them.. A Glacier is an accumulation of snow that is large enough to survive the summer melt. What are glaciers?
Glaciers & Glaciation. Glaciers Glacier: a large, long-lasting mass of ice, formed on land that moves under the influence of gravity and its own weightGlacier:
UNIT 5WEATHERING: (B) GLACIERS Glacier-large long-lasting mass of snow compacted & recrystallized, first into firn then glacial ice. Glaciers part of hydrosphere.
Chapter 17 Glaciers.
 Runoff  Streams  Rivers  Water picks up particles of clay, sand, and gravel as it moves along Earth’s surface  Small grooves form – called rills.
Glacial Landforms. Continental Glaciers Striations Erosion of soil.
Depositional Features
LITHOSPHERE GLACIATION 1 Materials carried by the glaciers are deposited in two main ways;  Glacial Deposits (unsorted) and  Fluvio-glacial deposits.
D. Evan Stribling  a larger mass of compacted snow and ice that moves under the force of its own gravity (weight)  They erode in some places deposit.
Erosion and Deposition Glaciers ● Glacier - a large mass of ice that moves over land ● Alpine glaciers – occur in mountain and are erosional ● Continental.
Glaciers Landmarks of the Past. Glaciers: Large mass of ice, air, rock debris.Glaciers: Large mass of ice, air, rock debris. –At least partially formed.
Glaciers once covered most of the Earth –in total there have been up to 22 times when glaciers covered large areas of the Earth… including Alberta the.
Chapter 7.1b Glaciers.
What happens to the eroded debris? Glaciers pick up and transport a huge load of debris as they slowly advance across the land. Ultimately, these materials.
Ice, Ice, Baby! Glaciers and Glacial Features Photo Source:
Glacier Review.
LANDSCAPE FEATURES RESULTING FROM GLACIAL AND FLUVIOGLACIAL ACTION
How Do Glaciers Shape the Land?
Like running water, gravity is the driving force
Explain the formation of a glacial trough. [7 marks]
LANDFORMS OF GLACIAL DEPOSITION
III. Deposition-the process by which sediments
Erosion and Depistion BY GLACIERS!.
Prairie School Earth Science
Glaciation of Canada.
Deposits by Glaciers material carried by glaciers is deposited by melting deposits of glacial origin are called drift. 2 kinds of drift: Till and outwash.
Lesley Monk Balfron High School Session 2005/6.
Deposits by Glaciers Most of the material carried by glaciers is deposited by melting, called drift. 2 kinds of drift: Till is left under or along the.
Fluvioglacial Landforms
Earth Science Chapter 8 Section 3
LANDSCAPE FEATURES RESULTING FROM GLACIAL AND FLUVIOGLACIAL ACTION
Presentation transcript:

A2 Glacial Deposition

Glacial Deposition

TODAY

LAST GLACIAL MAXIMUM

 Further compaction squeezes all the air spaces out.  The firn changes to a blue-green glacial ice.  Once it reaches a thickness of metres, the ice cannot support its own weight and yields to plastic flow.  It now moves downslope under its own weight.

Fluvio-glacial environment WATER - SORTED ICE UNSORTED Terminal

Glaciers: ERODETRANSPORTDEPOSIT

Processes of Transportation: 1. Supra-glacially- on the glacier surface 2. Englacially - inside the glacier 3. Subglacially - at the base of the glacier

Why does Deposition Occur? Ice Melting - due to: 1. Pressure Generated Heat 2. Geothermal Heat 3. Daytime Warming - Insolation 4. Warmer temperatures at lower altitudes 5. Prolonged insolation in Polar summers

Processes of DepositionLandforms 1. Melt-Out (TILL)Moraines Till Plains Erratics 2a. Fluvioglacial (CONSOLIDATED)Sandurs Varves Drumlins 2b. Ice ContactEskers Kames

Landforms 1. Melt-Out (TILL)Moraines Till Plains Erratics

Medial Moraine

Lateral Moraine

Supraglacial Moraine

Recessional Moraine

Till - unconsolidated - eg Cromer

Erratic - eg Norwegian erratics found in East Anglia

Landforms 2 Fluvioglacial (CONSOLIDATED) Sandurs Varves

Outwash plains / Sandurs. Kames and kettle lakes may be part of this environment.

As the ice melts, a hole, or kettle, forms in the debris. This is similar to burying an ice cube in fine sand; when the ice cube melts, a pit develops.

Views from Storadimon

A small delta

VARVES

Thick Varves = Warm Temperatures Lots of melting - Ablation Increased Deposition

Landforms 1b. Ice ContactEskers Kames Drumlins

Sediment deposited

Esker - a sinuous ridge of sands and gravels

ICE NB supraglacial channels flow to side of glacier (as glacier is slightly higher in the middle. The lateral stream channels are trapped by the valley sides. They carry sediment - hence SORTED deposits - and are different to lateral moraines - which are UNSORTED. Valley Side Valley Side

Once the ice has melted away (I.e in an interglacial period) a terrace is left perched up on the valley wall - SORTED deposits

Drumlins

The situation is further complicated by subsequent re-working of the sediments - for example by climatic cooling and a subsequent ice re-advance.This can make it difficult to establish what a drumlin actually is as the evidence can been bulldozed by ice Example Bangor, North Wales

Rock Flour

As rock flour enters this lake in Alberta, Canada, it turns the water milky.

An iceberg containing glacial debris.

What are these landforms of glacial deposition?

A2 REVISION GLACIAL DEPOSITION

Feedback: Privacy Policy Feedback
Do Not Sell My Personal Information
About project: SlidePlayer Terms of Service

© 2024 SlidePlayer.com Inc. All rights reserved.