Exfoliation is the separation of rock layers due to weathering. An everyday example is concrete breaking due to water freezing. Spheroidal weathering creates rounded rock edges.
Exfoliation is the separation of successive shells from bedrock due to weathering processes. This leads to the disintegration of rocks into thin layers.
An everyday example illustrating a similar effect to freeze-thaw action is the concrete of a road breaking apart due to water entering cracks, freezing, expanding, and causing the concrete to crack further.
Spheroidal weathering, a result of exfoliation, creates rounded edges and corners on rock outcrops, giving them a 'blobby' appearance.
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