Images

USGS Scientists taking sediment core USGS Scientists taking sediment core at Six Gill Slough restored marsh.

Maps show eelgrass distribution (left) along the tracklines followed by the boat (right).

This is a graphic from the USGS National Oil and Gas Assessment Explorer application, which allows user to drill into 70 oil and gas assessment provinces throughout the United States.

A field team from the USGS Cascades Volcano Observatory discuss station maintenance plans on the north side of Mount St. Helens, Washington. Pictured in the center of the crater is a steaming lava dome from the 2004-08 eruption, and the fractured surface of Crater Glacier emerging from the gap on the north flank.  

Juga sp. snails, the molluscan intermediate host for Nanophyetus salmincola, populate the bottom of a stream bed in a south Puget Sound watershed.

The sun rises at Mount St. Helens (pictured in the distance), with low-level clouds covering Coldwater Lake. The view is from the Coldwater Science and Learning Center, the site of the 2018 GeoGirls field camp program.

Web cam mounted near USGS gaging station site number 12046260, looking upstream from the water supply diversion structure on the lower Elwha River near Port Angeles in Washington.

Flushing stomach contents from a live resident Chinook salmon for an investigation of cannibalism and predation impacts.

Gills from Lost River suckers with a heavy infestation of Ichthyobodo sp. (arrows).  Slide is stained with hematoxylin and eosin.

Herring (top) and juvenile Chinook salmon (bottom) flushed from the stomach of a resident Chinook salmon in Puget Sound.

Map highlighting sampling locations of 339 Northern Spotted Owls used in Miller, et al, 2018

GeoGirls take core samples at a pond near the Hummocks Trail to study groundwater transport.

GeoGirls analyze volcanic sediment at the Coldwater Lake outlet.

The GeoGirls examined tephra (ash and pumice) deposits from Mount St. Helens’ eruptive past and learned how to create a stratigraphic column.

Diana McCandless of the Washington State Department of Ecology pauses for a moment, on the beach around the point and to the east of the mouth of Elwha River. McCandless is part of a team of scientists from WA State and the USGS who are periodically mapping the delta and beach areas near the mouth of the Elwha River.

USGS and Washington State Department of Ecology scientists are geared up and ready to start a topographic survey at the mouth of the Elwha River, using handheld computers and backpack-mounted GPS equipment. From left to right are Owen Warrick (USGS Volunteer), Jon Warrick (USGS), Andy Ritchie (USGS), Heather Weiner (WA State Dept.

Nested polymerase chain reaction (nPCR) for the detection of Renibacterium salmoninarum. Agarose gel electrophoresis is used for size separation and visualization of amplified DNA sequences.

Timex (time-exposure) image: a time-averaged image of all frames, smoothing away surface waves and determining the location of persistent wave-breaking (indicative of shallow sandbars).

Dark image: the darkest pixel values throughout the video, useful for tracking sediment plumes, tracking floating debris, and filtering out breaking waves.

A pair of video cameras overlook the coast along a beach on Whidbey Island, Island County at the northern boundary of Puget Sound in western Washington. View looks west out into the Strait of Juan de Fuca.

Variance image: the standard deviation of pixel intensity throughout the video, and it is useful for determining how much variation or movement is occurring at a given location.