C and O Canal towpath Location: C and O Canal National Park, MD Year: 2014 Merckdigitals catalogue number: 06-87461 Comments:

C and O Canal towpath Location: C and O Canal National Park, MD Year: 2014 Merckdigitals catalogue number: 06-87463 Comments:

Phyllite with visible foliation Location: C and O Canal National Park, MD Year: 2014 Merckdigitals catalogue number: 06-87472 Comments:

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