Black and white lantern slide of a slope of rock fragments, or talus, taken from a roadside in Mexico.

Black and white lantern slide of Mexican mountainsides taken from the roadside.

Black and white lantern slide of Mexican mountainsides taken from the roadside.

Black and white lantern slide of a man leaning against a wall of stone at the East fork of Greenwood Creek.

Black and white close-up photograph of a brook near Lake Otsego, New York. Flat slabs of marcellus shale line the bed of the brook.

Black and white photograph of a hillside covered with field grass and shrubs in Otsego County, New York. Shale outcroppings jut out from the hillside, partially obscured by foliage.

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

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 woman standing in a rocky gorge.

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

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 cliff face.