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.

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).

Bumble bee landing on a cone flower provided by USGS Ecosystems Mission Area. 

Photograph showing USGS employees on State Highway 104 near the Arkansas River near Haskell, Oklahoma, streamgage (07165570). Photograph by Kevin Smith, U.S. Geological Survey.

 U.S. Geological Survey Open-File Report 2020–1090

USGS hydrologist Tim Cowdery titrates water alkalinity in a mobile sampling van using an electronic field form.

Beach-ridge prairie at Glacial Ridge National Wildlife Refuge

USGS technician Jody Hulne collects a groundwater nutrient sample at Glacial Ridge National Wildlife Refuge.

USGS scientists Nicholas van der Elst and Alan Yong installing a seismometer near the 2019 Ridgecrest earthquakes in southern California in order to record its aftershocks.

View to northeast from southwestern Arctic National Wildlife Refuge-1002 Area with ice in Camden Bay in distance. In foreground, red-weathering rocks are Hue Shale (oil-prone source rock with is present throughout 1002 Area) and dark gray rocks are Kemik Sandstone (lateral equivalent to Thomson sandstone, main reservoir in Pt. Thomson field).

Southward view of tundra surface and lakes on Canning River Delta near northwestern corner of Arctic National Wildlife Refuge-1002 Area.

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.

This is remote capture image of a Yosemite toad seen crossing beneath "toad road" structure built atop a forest road in the Sierra National Forest. Reseachers are exploring tools, such as this elevated road structure, or "toad road," to reduce vehicle strikes to this threatened species.

A well at a restored prairie on Lake Agassiz beach ridge, Glacial Ridge National Wildlife Refuge