Geology 101 with Willsey, Episode #18: Unconformities (or Erosion Happens)

New to geology, want to learn some basic concepts, or just need a geology refresher? Join geology professor Shawn Willsey for this new series as he presents the same lectures as his GEOL 101 (Physical Geology) course. These videos are for everyone.
Here in episode no. 18, we learn about rock contacts and unconformities, surfaces or contacts created by erosion.
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