Black and white photograph of chalcedony quarry site #1 looking west in Amarillo, Texas. An automobile and a person are visible in the background.

Black and white photograph of the cliff face of the Black slate folded cliff from below.

Black and white lantern slide of old lava flows on Purple Mountain in Colorado.

Black and white photograph of a man standing atop a drumlin, or hill formed of rock debris. Likely taken near Clinton, New York.

Black and white photograph of an exposed strata along Crane Creek. Three men are visible in the photograph, with two standing next to the strata and one man working in the strata.

Black and white lantern slide copy of a sketch map showing Lake Tonawanda and spillways from it to glacial Lake Iroquois, with surrounding text from an unidentified publication.

Black and white lantern slide copy of a sketch map of the vicinity of Lake Ontario showing physiographic divisions, with surrounding text from an unidentified publication.

Black and white lantern slide copy of a sketch map showing moraines around the west end of Lake Ontario, with surrounding text from an unidentified publication.

Black and white photograph of a glacial groove in Silurian Diabese on Mount Washington. Scattered rocks and stone are visible between two large boulders with field grasses in the background.

Black and white lantern slide of a lava cap south of Pocatello, Idaho, with a railroad and road in the mid and foreground.

Black and white photograph of a rock cliff face.

Black and white photograph of a man standing next to a rock wall, or "knob," in Little Falls, New York.