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Language: en

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Marine life in Cordell Bank National
Marine Sanctuary

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thrives in part due to its geological features.

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The granite bedrock was once part of the Sierra Nevada

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mountain range until movement in the
Pacific tectonic plate

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sheared the granite bedrock into its present location

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off the coast of Point Reyes, California.

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The bank is still moving at a
rate of five centimeters each year.

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Invertebrates flourish here, thanks to
large rock formations and shallow waters

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where they can attach.

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The sandy channels throughout the bank

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provide a historical record for life

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and are a great place for scientific research.

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In fact, the sand isn't really sand at all

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but is composed of shell fragments and calcium carbonate deposits

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from the animals that used to
live there.

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The unique blend of oceanic conditions and

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geological topography allow Cordell Bank National Marine Sanctuary to thrive.