Granite dike cross-cutting amphibolite Location: Great Falls of the Potomac National Park - Billygoat Trail near "the beach", MD Year: 2001 Merckslides catalogue number: 06-14351 Comments:

Shear zone in gneiss Location: Great Falls of the Potomac National Park - Billygoat Trail near "the beach", MD Year: 2006 Merckslides catalogue number: 06-23137 Comments:

Outcrop of gneiss Location: Great Falls of the Potomac National Park - Billygoat Trail near "the beach", MD Year: 2006 Merckslides catalogue number: 06-23136 Comments:

Kyanite pseudomorphs in gneiss Location: Great Falls of the Potomac National Park - Billygoat Trail near "the beach", MD Year: 2005 Merckslides catalogue number: 06-21456 Comments: This is always our last stop on the Geology 100 field trip.

Eroded kyanite pseudomorphs in gneiss Location: Great Falls of the Potomac National Park - Billygoat Trail near "the beach", MD Year: 2008 Merckdigitals catalogue number: 06-50251 Comments: This is always our last stop on the Geology 100 field trip.

Detail of eroded kyanite pseudomorphs (above) Location: Great Falls of the Potomac National Park - Billygoat Trail near "the beach", MD Year: 2008 Merckdigitals catalogue number: 06-50251 Comments: This is always our last stop on the Geology 100 field trip.

Amphibolite Location: Great Falls of the Potomac National Park - Billygoat Trail near "the beach", MD Year: 2005 Merckslides catalogue number: 06-21455 Comments:

Return to list