Geology of the National Parks



This week, we feature two GeoClips, both featuring Dr. Alley. As before, we hope you enjoy these, and find them to be useful complements to the readings, class notes, and slide shows of Unit 7.

The Bear Meadows National Natural Landmark, just over the ridge from Penn State’s University Park campus, was recognized by the National Park Service in 1966 as a site that “possesses exceptional value as an illustration of the nation’s natural heritage.” Although many guide books somehow have decided that Bear Meadows is 10,000 years old, the Meadows are clearly much older, having formed during the last ice age. Here, take a walk just above the Meadows, and learn why Pennsylvania hikers, like those in the high country of the Rocky Mountains, are wise to wear sturdy shoes. Then, see what this has to do with the Formation of the Meadows—they really are related.

Rivers of Rocks and Permafrost

The Formation of Bear Meadows

Want to see more?

Here are some optional animations you might also want to explore! (No, these won't be on the quiz!)

Glacier Physics
(An extensive collection of animations on this subject)

Glacial Landforms Resulting from Erosion and Deposition
(An extensive collection of animations on this subject)

Examples of Deglaciation
(An extensive collection of animations on this subject)