Earth Science, 10^th edition

Chapter 5: Glaciers, Deserts, and Wind

 

 

    I. Glaciers: a part of two basic cycles in the Earth system

       A. Glaciers are a part of both the hydrologic cycle and rock cycle

 

       B. Glacier –

 

       C. Types of glaciers

              

 

 

 

       D. Movement of glacial ice

             1. Types of glacial movements

                  

 

             2. Zone of fracture

                  

 

             3. Zone of accumulation

 

             4. Zone of wastage

 

       E. Glaciers erode by

              

 

        F. Landforms created by glacial erosion

    

 

       G. Glacial deposits

             1. Glacial drift

                  

 

             2. Depositional features

                  

 

       H. Glaciers of the past

             1. Ice Age

                  

 

             2. Indirect effects of Ice Age glaciers

                  

 

        I. Causes of glaciation

             1. Successful theory must account for

                  

 

             2. Proposed possible causes

 

                  a. Plate tectonics

                       

 

                  b. Variations in Earth's orbit

                      1. Milankovitch hypothesis

                            

 

                      2. Changes in climate over the past several hundred thousand years are

                           closely associated with variations in Earth's orbit

 

  II. Deserts

       A. Geologic processes in arid climates

             1. Weathering

                  

 

             2. Role of water in arid climates

                  

 

                  

 

       B. Basin and range: the evolution of a desert landscape

              

 

 

 

       C. Wind erosion

              

 

 

 

       D. Types of wind deposits

 

 

             1. Loess

              

 

 

             2. Sand dunes