Smithsonian Institution:
Griswold farm area, East Chatham 7 1/2 quadrangle, Columbia Co., New York
Smithsonian Institution:
Hammer on Centropleura bed
Smithsonian Institution:
Northwest face of Mt. Stephen from the top of Mt. Field, Showing North Gully and Fossil Gully
Smithsonian Institution:
Boundaries checked 1/7/48
Smithsonian Institution:
Type section of Charny Formation (Lower Cambrian) at Chaudiere Falls, Quebec
Smithsonian Institution:
Potsfordia pretiosa shale (Lower Cambrian) near Charny, Quebec
Smithsonian Institution:
Slumped Lower Ordovician beds (1944)
Smithsonian Institution:
Ellsapsis beds, Ville Guay, Quebec