GLACIAL EROSION, TRANSPORTATION & DEPOSITION

A. Introduction

examine the processes of erosion, transportation & deposition

affects the character of landforms

B. Erosion

1. Abrasion

a. evidence: glacial flour, striations, polished rock

b. factors affecting the rate of abrasion

2. Crushing and fracturing

a. evidence: chatter marks

3. Plucking (quarrying)

4. Meltwater

C. Transportation

1. Transport by glacial ice

a. subglacial debris

b. supraglacial debris    

c. englacial debris

2. Transport by meltwater

3. Transport by wind

D. Deposition

1. Nonstratified drift: diamictons or till

a. characteristics

b. examples

• lodgement till

• ablation till

2. Stratified drift

a. characteristics

b. examples

• fluvioglacial deposits

• glaciolacustrine deposits

• glacioeolian deposits

F. Summary

• agents of erosion, transportation & deposition include ice, water & wind

• produce landforms with unique characteristics