Images

Towering cliff of the Deadwood Formation in Deadwood, SD. The Deadwood Formation consists mostly of sandstone and shale.

Fish seining efforts on the Colorado River

Grace Collidge Creek above loss zone in southern Black Hills of South Dakota.

Spearfish Formation near Spearfish, SD. The Spearfish Formation is a red, silty shale with interbedded red sandstone and siltstone. The formation contains massive gypsum deposits, which is the white layer in the photograph.

Naturally occuring bog-iron area near Rochford, SD, in the Black Hills of western South Dakota.

Outcrop of the Madison Limestone in Spearfish Canyon in the northern Black Hills of South Dakota. The Madison Limestone is a massive, gray to buff limestone with some dolomite.

Outcrop of the Minneslua Formation at Ranch A near Beulah, Wyoming. The Minnelusa Formation consists mostly of yellow to red sandstone, limestone, dolomite, and shale.

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.