The Beckman Coulter LS 13 320 uses laser diffraction to automatically analyze sediment size fractions between 2 millimeters and 0.35 micron (-1 phi to 11.5 phi).
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Laser diffraction for measuring sediment size fractions
The Beckman Coulter LS 13 320 uses laser diffraction to automatically analyze sediment size fractions between 2 millimeters and 0.35 micron (-1 phi to 11.5 phi).
X-ray particle-size analysis of sediment settling rates
The Micromeritics Sedigraph III uses X-rays to automatically analyze settling times for sediment sizes between 300 microns and 0.1 microns (2 phi to 13 phi).
The Micromeritics Sedigraph III uses X-rays to automatically analyze settling times for sediment sizes between 300 microns and 0.1 microns (2 phi to 13 phi).
Settling tube lab
For some projects, scientists want to calculate sediment settling velocity and need to measure particle size using gravity. We use custom-built settling tubes filled with water – three at 2 meters tall (like the one shown here) and one 3 meters tall.
For some projects, scientists want to calculate sediment settling velocity and need to measure particle size using gravity. We use custom-built settling tubes filled with water – three at 2 meters tall (like the one shown here) and one 3 meters tall.
Settling tube sediment delivery mechanism
The settling tube is filled with water and a pre-weighed sediment sample of mixed particle sizes is poured onto this brass "gate" at the top of the tube. When the operator flips the switch, the gate opens quickly like a venetian blind, releasing the whole sediment sample into the water column at the same time.
The settling tube is filled with water and a pre-weighed sediment sample of mixed particle sizes is poured onto this brass "gate" at the top of the tube. When the operator flips the switch, the gate opens quickly like a venetian blind, releasing the whole sediment sample into the water column at the same time.
Settling tube pan and microbalance
After releasing sediment into the top of a settling tube filled with water, a pan and microbalance collects and weighs the sediment as it slowly reaches the bottom of the tube. A computer records the cumulative sediment weight over time, as well as how long it took each particle to reach the pan.
After releasing sediment into the top of a settling tube filled with water, a pan and microbalance collects and weighs the sediment as it slowly reaches the bottom of the tube. A computer records the cumulative sediment weight over time, as well as how long it took each particle to reach the pan.
Carbon analysis system
In the carbon analysis laboratory, these three instruments (the UIC CM250) automatically analyze the total carbon, total organic carbon, and total inorganic carbon content of multiple dried sediment samples.
In the carbon analysis laboratory, these three instruments (the UIC CM250) automatically analyze the total carbon, total organic carbon, and total inorganic carbon content of multiple dried sediment samples.
Total inorganic carbon content analyzer
The UIC CM5230/CM5015 analyzes total inorganic carbon content. It's less automated than other analyzers, but often easier to use.
The UIC CM5230/CM5015 analyzes total inorganic carbon content. It's less automated than other analyzers, but often easier to use.
Fume hood lab
Our fume hood lab allows for sample preparation in safe conditions.
Our fume hood lab allows for sample preparation in safe conditions.
Accelerated solvent extractor
This Dionex ASE 350 accelerated solvent extractor automatically extracts hydrocarbons for further analysis. We also have a Zymark TurboVap II for sample preparation (not shown).
This Dionex ASE 350 accelerated solvent extractor automatically extracts hydrocarbons for further analysis. We also have a Zymark TurboVap II for sample preparation (not shown).
Andrew Stevens runs a personal watercraft rigged with sonar and precis
Andrew Stevens runs a personal watercraft rigged with sonar and precision GPS to survey northern Monterey Bay, California.
Andrew Stevens runs a personal watercraft rigged with sonar and precision GPS to survey northern Monterey Bay, California.
USGS researchers stay in radio contact with a PWC operator
Alex Snyder (left) and SeanPaul La Selle stay in radio contact with a personal watercraft operator offshore in order to provide supplies and safety near Moss Landing, California.
Alex Snyder (left) and SeanPaul La Selle stay in radio contact with a personal watercraft operator offshore in order to provide supplies and safety near Moss Landing, California.
Dan Hoover takes a break near Moss Landing, California
Dan Hoover takes a break near Moss Landing, California. Dan drives the all-terrain vehicle seen behind him to rapidly survey long sections of beach using precision GPS.
Dan Hoover takes a break near Moss Landing, California. Dan drives the all-terrain vehicle seen behind him to rapidly survey long sections of beach using precision GPS.
Shawn Harrison surveys beach topography using a backpack
Shawn Harrison surveys beach topography using a backpack equipped with precision GPS at Zmudowski State Beach, California. The fog-shrouded Moss Landing Power Plant looms in the background.
Shawn Harrison surveys beach topography using a backpack equipped with precision GPS at Zmudowski State Beach, California. The fog-shrouded Moss Landing Power Plant looms in the background.
USGS researchers are ready to install moorings in Wellfleet, Mass.
Dann Blackwood, Jon Borden, and Steve Suttles of USGS ready to install moorings in Wellfleet, Massachusetts. USGS scientists measure water velocity, water quality, suspended sediment, and many other values to improve computer models of wetland changes in coastal National Park Service units, including Cape Cod National Seashore.
Dann Blackwood, Jon Borden, and Steve Suttles of USGS ready to install moorings in Wellfleet, Massachusetts. USGS scientists measure water velocity, water quality, suspended sediment, and many other values to improve computer models of wetland changes in coastal National Park Service units, including Cape Cod National Seashore.
USGS researchers adjust a computer and video cameras on a roof
Gerry Hatcher (left) and Shawn Harrison adjust a computer controlling video cameras on the roof of the Dream Inn, a 10-story hotel overlooking Monterey Bay in Santa Cruz, California. Harrison uses the images to improve understanding and computer modeling of beach processes.
Gerry Hatcher (left) and Shawn Harrison adjust a computer controlling video cameras on the roof of the Dream Inn, a 10-story hotel overlooking Monterey Bay in Santa Cruz, California. Harrison uses the images to improve understanding and computer modeling of beach processes.
USGS researcher maps ocean depths using a PWC with GPS and sonar
Jackson Currie maps ocean depths using a personal watercraft equipped with precision GPS and sonar near Capitola, California
Jackson Currie maps ocean depths using a personal watercraft equipped with precision GPS and sonar near Capitola, California
Refrigerated sample storage shelving
The refrigerated sample repository of the USGS Pacific Coastal and Marine Science Center in Santa Cruz, CA includes easily accessible shelving space which can store thousands of samples.
The refrigerated sample repository of the USGS Pacific Coastal and Marine Science Center in Santa Cruz, CA includes easily accessible shelving space which can store thousands of samples.
Shawn Harrison surveys beach topography using precision GPS backpack
Shawn Harrison surveys beach topography using a precision GPS backpack on Twin Lakes State Beach, California. USGS researchers have measured coastal sediment supply and transport patterns in northern Monterey Bay for five years. Twice each year they survey the coast from Santa Cruz to Moss Landing with a variety of devices.
Shawn Harrison surveys beach topography using a precision GPS backpack on Twin Lakes State Beach, California. USGS researchers have measured coastal sediment supply and transport patterns in northern Monterey Bay for five years. Twice each year they survey the coast from Santa Cruz to Moss Landing with a variety of devices.
San Francisco Bay and Delta DEM
High-resolution (10-meter per pixel) digital elevation model (DEM) of the Sacramento-San Joaquin Delta, using both bathymetry and topography data relative to current modern datum of North American Vertical Datum of 1988 (NAVD88). This DEM is the result of collaborative efforts of the U.S.
High-resolution (10-meter per pixel) digital elevation model (DEM) of the Sacramento-San Joaquin Delta, using both bathymetry and topography data relative to current modern datum of North American Vertical Datum of 1988 (NAVD88). This DEM is the result of collaborative efforts of the U.S.
R/V Barnes with USGS seismic system
University of Washington's research vessel R/V Barnes is loaded with the USGS multichannel seismic system components GeoEel, Chirp, and boom plates.
University of Washington's research vessel R/V Barnes is loaded with the USGS multichannel seismic system components GeoEel, Chirp, and boom plates.
Isla Vista, California coastal bluff
Exposed bedrock on the beach during very low (negative) tide at Isla Vista, California.
Exposed bedrock on the beach during very low (negative) tide at Isla Vista, California.