All Multimedia

Earth MRI - Forty mile River Watershed

Earth MRI - High Grade Rare Earth Elements Bearing Phosphorite

Earth MRI - Rare Earth Elements Deposit

Earth MRI Geologic map of the Castle Rock quadrangle AZ

Prototype design of an airlift developed at CAFL to transport downstream migrant eels through a bypass pipe and away from turbine intakes. The airlift design passes eels as well as a conventional siphon or gravity pipe.

Left: Prototype ABS plastic eel climbing ramp under development and testing at CAFRL. New substrate design allows for passage of a wider size range of eels with less need for precise flow regulation. Right: juvenile eel climbing wetted ABS plastic substrate.

Apparatus used to test the sensitivity of eels to low-voltage pulsed DC electric fields. Knowledge of sensitivity of eels to electric fields enables development of behavioral barriers that use electricity to guide eels away from turbine intakes.

Evolution of the shoreline around the Elwha River mouth, Washington, before, during and after dam removal, 2011–2017. Two large dams were removed from the Elwha River between 2011 and 2014 in the largest dam removal worldwide thus far, releasing more than 20 million tons of sediment downstream.

A SonTek Argonaut mounting plate is fastened to 2" conduit using a structural pipe wall flange.

Morning fog over beach ridges at Glacial Ridge National Wildlife Refuge

Fog Over Glacial Ridge National Wildlife Refuge

Photo Contest Winner | Jan. 2020 | Honorable Mention
Frozen wetland Orange, Massachusetts

The recently published "Geologic map of the central-southeast flank of Mauna Loa" (https://pubs.er.usgs.gov/publication/sim2932B), shown here, uses color to depict ages of geologic units, with warm colors denoting younger units and cool colors indicating older units.

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).

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

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.

Head of the Meadow Beach, Cape Cod National Seashore, Massachusetts

Head of the Meadow Beach, Cape Cod National Seashore, Massachusetts

Dr.s Densmore and Henderson conducting a health assessment on a northern snakehead fish. This fish species is an air breather so health assessments out of water are not impossible to perform. 

Northeast Region Photo Contest, August 2019, Honorable Mention
Hydro tech, Alex Wong, collecting stream flow data

A 4" aluminum I-beam is used allow an ADVM to be raised and lowered on a stainless steel sled.  The I-beam also serves as a pedestal mount for electronics housing.