Rocks can be pushed, pulled, squeezed, and sheared. Their folds
and fractures show that rocks deform under stress. Rock can become
deformed during earthquakes, mountain-building, and other events
caused by movements of Earths huge tectonic plates.
How Do Rocks Deform?
Rocks That Break
Rocks That Flow
The red thumbprints in this
rock are garnets that grew when the rock was glowing hot, 16 km (10 mi)
below Earths surface. During their 2 million-year growth, they
rolled slowly like snowballs!