Alethopteris fern fossil:
Link GIGAmacro by Robin Rohrback
Rapid River Canyon, Idaho:
Link GigaPan by Callan Bentley
River cobble of brecciated Columbia River Basalt, Hammer Creek (Salmon River), Idaho:
Link GIGAmacro by Callan Bentley
Petersburg Granite exposed at Belle Isle, Richmond, Virginia:
Link GigaPan by Jeffrey Rollins
Ammonite:
Link GIGAmacro by Callan Bentley
Slickensides in ultramafic rocks of the Wallowa Terrane, just outboard of the paleo-Laurentian tectonic margin, Salmon River, Idaho:
Link GigaPan by Callan Bentley
Fossil cone:
Link GIGAmacro by Robin Rohrback
Boulder of brecciated Martin Bridge Formation marble, Rapid River Canyon, Idaho:
Link GigaPan by Callan Bentley
Graded bedding in Neoproterozoic Mechum River Formation, Sharp Top, Virginia:
Link GIGAmacro by Callan Bentley
Happy exploring!