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# The Exotic Mixed-Up Bedrock of San Juan Island
- URL: https://www.cascadepbs.org/show/nick-rocks/episode/the-exotic-mixed-up-bedrock-of-san-juan-island-ts2tji/
- Published: 2026-01-14T21:01:31.000Z
- Updated: 2026-01-14T21:30:09.000Z
- Description: The bedrock of San Juan Island mixes old ocean rock smashed together on the edge of North America.
- Author: Cascade PBS Staff
- Tags: Nick on the Rocks, Season 7, Episode 6, #ZZZ_Episode_5d9a9bc5-5cc5-4999-8339-43b500d87a17, #episode, #ZZZ_Show_fb43f9d5-44f4-411a-854a-568025965642, #v1.16

An old oceanic island, a deep-ocean magma chamber and an ancient batholith have all been pushed together to form the base of scenic San Juan Island. All around the island is evidence of volcanic activity that went down far off in the Pacific Ocean – including signs of an ancient coral reef!