Gutzon Borglum describes the sizes of features on Mount Rushmore sculpture

The video discusses the impact of erosion on stone features, particularly focusing on how long it takes for erosion to significantly alter these features. It explains that the process of erosion is slow, requiring hundreds of thousands of years to make noticeable changes. The video concludes by predicting that the work of erosion will continue for another 300,000 years before reaching a point of completion.

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