All Multimedia

A mountainous valley view from side of granite cliff at Chimney Rock Park with clouds above.

Crater Lake is the remnant of Mount Mazama, which erupted catastrophically 7,700 years ago to form the caldera.Wizard Island in lake and Mount Scott is peak on right shore. View from south. Oregon

Dauphin Island, Alabama. Three-dimensional views of island topography (A-C), post-Katrina oblique aerial photograph (D), and differences in topography from Hurricanes Ivan (E) and Katrina (F). The view is along the island, looking from east to west, with the Gulf of Mexico to the left and Mississippi Sound to the right.

Dauphin Island, Alabama. Map views of post-storm difference grids for Hurricanes Ivan (A) and Katrina (B), and vertical photography of the same location (C). The lidar images show elevation gains (green) and losses (red).

Aggregation of different species of shorebirds feeding in the salt marsh.

Aggregation of different species of shorebirds feeding in the salt marsh.

This is what an unburned mid-elevation community in the Hackberry region of the Mojave National Preserve looks like. Note the dense cover and high diversity of shrubs. There are few if any invasive plants in the community.

Domestic well on the Arapahoe Aquifer from the USGS Circular 1357 "Water Quality in the Denver Basin Aquifer System, Colorado, 2003-2005."

Dry Falls amid deciduous autumn foliage.

Dry Falls amid deciduous autumn foliage.

A feral horse standing in a field.

Closeup of a feral horse grazing in a field.

A black feral horse grazing on sand dune grasses.

A black feral horse grazing on sand dune grasses.

Closeup of a feral horse grazing in a field.

Closeup of a feral horse standing in a field with its head turned.

Closeup of a feral horse in a field with its head turned.

Closeup of a black feral horse grazing in a field.

Fissure near Lucerne Lake along State Route 247 (visible in background), Mojave Desert, California. The localized subsidence in five areas near dry lake beds was caused by declining water levels in fine-grained (clay and silt) sediments. In the Mojave River and Morongo Groundwater Basins (fig.

Large-scale poster describing USGS work.

USGS scientists needed a better way to measure river sand in the Grand Canyon. Traditionally, scientists used a bucket to get about 75 sand samples on each trip, which were analyzed weeks later in a lab.

Top view of Glens Falls and the surrounding autumn foliage of the mountain forests.