Researchers collecting cores at the inlet to the John Heinz National Wildlife Refuge (IMAGE)

Penn State

Researchers collecting cores at the inlet to the John Heinz National Wildlife Refuge

Caption

Jill Arriola, left, and Daniel Guarin collecting cores at the inlet to the John Heinz National Wildlife Refuge at Tinicum, which houses the largest remaining freshwater tidal marsh in Pennsylvania. 

Credit

Lisa Emili/Penn State

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License

CC BY-NC-ND

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