WHAT ARE LANDFORMS? Landforms are the natural features of the earth's surface. Here are some examples:
- VERY LARGE: continents, ocean basins
- LARGE: whole mountain ranges, vast plains and plateaus.
- INTERMEDIATE: individual mountains, hills, valleys.
- SMALL: hillside slopes, river banks, dunes.
- VERY SMALL: boulders, grooves and scratches on rocks.
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THE AIMS OF THE INVESTIGATION:
- To understand the nature of evidence in geology.
- To understand how geologists draw conclusions.
- To investigate the origin of hills and valleys that characterize the New York City region and, in doing so, to provide explanations for the origin of some smaller landforms.
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Preview three common hypotheses of how hills and valleys form by clicking on the buttons.
 Differential Erosion. |  |
| Differential Deposition. | |
| Uplift and Depression. | |
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| Now more fully explore and test each of these hypotheses. Go back to the NYC Home Page and click on "Testing Hypotheses". |
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