Images

Well head of Sourdough oil discovery on Alaska state lease less than one mile west of Arctic National Wildlife Refuge-1002 Area showing minimal disturbance of permafrost polygons.   

Sandhill Crane Pair in flight at Glacial Ridge National Wildlife Refuge

Northward view in central Arctic National Wildlife Refuge-1002 Area near the Sadlerochit River showing gently rolling topography typical of the southern coastal plain and meandering creek.

Photo of stream in urban environment with green lawn beside it. Photo credit: Alan Cressler USGS

Animated GIF of bighorn sheep pulled from the "Wildlife on the Nevada National Security Site" video by the USGS. 

Northward view in western Arctic National Wildlife Refuge-1002 Area with ice in Camden Bay in distance. North sloping, tundra-covered surface is typical of coastal plain.

View to northeast from western Sadlerochit Mountains near the Tamayariak River. This gently rolling topography is typical of the southern coastal plain.

View to the northeast from east-central Arctic National Wildlife Refuge-1002 Area near the Jago River.

Eastward view from east-central Arctic National Wildlife Refuge-1002 Area near the Jago River. Northeastern Brooks Range visible in distance at right.

Geologists examine oil-saturated Oligocene sandstone in the Sagavanirktok Formation exposed on Marsh Creek anticline near Katakturuk River in western Arctic National Wildlife Refuge-1002 Area. Weathered surfaces are light gray and freshly broken surfaces are brown.

Closeup view of oil-saturated Oligocene sandstone in the Sagavanirktok Formation exposed on Marsh Creek anticline near Katakturuk River in western Arctic National Wildlife Refuge-1002 Area. Weathered surface is light gray and freshly broken surface is brown.

Oil-saturated Miocene or younger sandstone in the Sagavanirktok Formation exposed at Angun Point on the coast of the Arctic Ocean, northeastern Arctic National Wildlife Refuge-1002 Area.

Young moose near Benoit, Minnesota, Glacial Ridge National Wildlife Refuge

Ephemeral wetlands at Glacial Ridge National Wildlife Refuge

Barred Tiger Salamander Paedomorph, Cottonwood Lake Study Area, North Dakota. Some barred tiger salamanders never metamorphose and keep their larval features (e.g., gills, finlike tail) their whole lives as reproductively mature adults known as paedomorphs, which can grow to be 14 inches in length.

Arizona is blessed with many natural wonders including the Grand Canyon, Lake Powell/Rainbow Bridge, Petrified Forest/Painted Desert, Monument Valley, Meteor Crater, and Superstition Mountain.

Capital Phoenix

Image Source Landsat 8

Population 7,151,502

Animated GIF of a baby tortoise hatching out of its shell. Pulled from "The Heat is On: Desert Tortoises and Survival" video by Stephen M. Wessells.

Gas hydrate is sometimes called “the ice that burns” because the warming hydrates release enough methane to sustain a flame. Credit: USGS

View to the northeast towards Camden Bay from west-central Arctic National Wildlife Refuge-1002 Area. The tundra and lakes in this area displays a variety of patterns caused by permafrost.

Northward view in central Arctic National Wildlife Refuge-1002 Area near the Sadlerochit River showing gently rolling topography typical of the southern coastal plain.

These images show grass carp larvae from the Maumee River. Characteristics of larval grass carp include overall length (left), skeletal muscle development (center) and presence of an eye spot that lacks pigmentation (right; pigment starting to develop on lower eye).