Current geological activity in Shenandoah National Park is a result of natural and man-made forces acting on the surrounding mountains and valleys. Freezing and thawing can result in rockfalls and spalling from cliff faces. Severe thunderstorms and rain events can cause flooding and associated erosion. In extreme cases, large amounts of rain can cause landslides. Some forces act together to produce geological change. A wind storm may bring down trees that were killed in a wildland fire on land where, in turn, severe rain could cause significant erosion. Most often these events are relatively small, but over millions of years, these small events produce sizable changes in the land. The result is a landscape undergoing constant change.
Learn more about the rocks that make Shenandoah
Last updated: February 28, 2019