| A | B |
|---|
| Desert pavement | Layer a course pebbles and gravel |
| Esker | Ridge composed primarily of sand and gravel deposited by a stream beneath a glacier |
| Glacier erratic | Ice transported boulder |
| Glacier | Thick mass of ice originating on land |
| Moraine | Unsorted sediment left by a glacier |
| Precession | Slow motion of Earth's axis that traces out a cone over a period of 26,000 years |
| Sediment | Loose particles created by weathering |
| Snow line | Lowest evevation in an area that has snow all year |
| Till | Sediment of different sizes deposited directly by a glacier |
| Valley glacier | Alpine glacier |
| Drift | all rock or sediment deposited by a glacier |
| Pleistocene Ice Age | Began about 2 million years ago |
| Eccentricity | Shape of an ellipse |
| Playa | Dry lake bed |
| Butte | Flat top mountain |
| Deflation | Wind erosion |
| Dune | Mound of wind deposited sand |
| Loess | Wind deposited silt |
| Desertification | Caused by human mismanagement |
| Mesa | Formed from an eroding plateau |
