THE HYPOTHESIS: One or more of the major landforms of the NY City Area formed due to the more rapid wearing away of areas underlain by non-resistant materials and less rapid wearing away of areas underlain by resistant materials.
THE PREDICTION: One or more areas that have higher elevations should be found to be underlain by more resistant material than adjacent areas with lower elevations.
EVALUATING THE PREDICTION: Elevation data may now be compared to the Erosion Resistance Index to evaluate the prediction.
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David J. Leveson