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Photograph taken in 2001 of Mt. Coolidge area in Black Hills of western South Dakota. The area was burned by the Galena Fire in 1988, which burned approximately 17,000 acres in Custer State Park.

Precambrian rocks in the Black Hills of South Dakota. Precambrian rocks form the central crystalline core of the Black Hills. Fracturing and weathering in Precambrian rocks affect the availability of water in this unit.

Sand Creek at Ranch A near Beulah, Wyoming.

Spearfish Creek in the northern Black Hills of South Dakota.

Headwater springflow is common in the Limestone Pateau area in the Black Hills of western South Dakota. Most headwater springs in the Black Hills, like this one contributing to Rhoads Fork, generally occur near the base of the Madison Limestone along the eastern edge of the Limestone Plateau area.

Plant foliage samples being placed in direct sunlight for water extraction by solar distillation. Water vapor released from the foliage condenses as liquid on the inside surface of the sample bag.

Scientist Jonathan Godt samples a landslide headscarp in Alameda County, CA.

Split brick and wood stilling well gage house on the bank of the South Branch Raritan River near High Bridge, New Jersey

Ayers Rock (Uluru) and vegetation.

An array of rocks with vegetation interspersed.

National Aerial Photography Program (NAPP) - Little Rock, AR - Color Infrad - March 25, 2001

Mount Baker, aerial view to the northeast.

Sherman Crater, to the left of the true summit, at Mount Baker, Washington, aerial view to the northwest.

Snow covers the coniferous trees and low-lying vegetation on either side of a calm stream.

Snow covers the coniferous trees and low-lying vegetation on either side of a calm stream or river.

Polar bear mother and two cubs on the Beaufort Sea ice.

A bed of manganese nodules from deep offshore of the Cook Islands. Each color bar in the staff represents 10 centimeters.

Landsat 7 captured this image of center-pivot irrigation (green circles) in the Saudi Arabian desert in 2000. Images taken of the same location over several decades show the explosive increase of irrigated land over time, as hidden reserves of water have been tapped beneath desert sands to grow grains, fruits, and vegetables.

A bed of manganese nodules from deep offshore of the Cook Islands; photo sourced from Hein et al., 2015, taken during a Japanese research cruise in the year 2000. Nodules range from about 2 to 10 centimeters across.

Note the protruding logs and branches from living trees that were knocked down and carried by the lahar. Ice axe, 3 ft, shows scale. Lahars are the greatest hazard at Mount Baker.