Black and white lantern slide of Obsidian Cliff, Wyoming.

Black and white lantern slide of old lava flow formations near Soda Butte Creek.

Black and white lantern slide of old lava formations on Amethyst Mountain in Wyoming.

Black and white lantern slide of clay varves, or laminated sediment, along the Gibbon River in Wyoming.

Black and white photograph looking northwest along Abbot's Brook in Trenton, New Jersey, near Argillite site.

Shoemaker Ranch near Folsom, New Mexico: Lower hearths looking northwest. A man is visible squatting in the middle of the Lower hearths.

Black and white photograph of a cliff face.

Black and white photograph of a gulley from above. A cactus is visible on the right side of the frame.

Black and white photograph of a gulley with tents visible in the distance.

Black and white photograph of a woman standing in a rocky gorge.

Black and white photograph of a cliff face next to water. "A Panama Slide." is written on the bottom of the image.

Black and white photograph of a small mountain in Otsego County, New York. Rock outcroppings jut out from the grassy hillside.