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Laboratory methods
Experimental techniques to analyze and test samples in a place equipped and designed for the work.
Subtopics:
Chemical analysis (60 items)
Core analysis (9 items)
Culturing (specimens) (1 items)
Faunal and floral census (microscopic) (3 items)
Grain-size analysis (3 items)
Isotopic analysis (23 items)
Meristics (1 items)
Microscopy (5 items)
Paleomagnetic analysis (3 items)
Plant and animal testing (5 items)
Therapeutic methods (2 items)
Tree ring analysis (1 items)
Camera calibration (1 items)
Age estimation methods (6 items)
Results 91 - 100 of 112 listed alphabetically [list by similarity]
PDF Selenium and stable isotopes of carbon and nitrogen in the benthic clam Corbula amurensis from Northern San Francisco Bay, California: May 1995-February 2010 [More info]
Monthly selenium concentration in this keystone species shows strong spatial and seasonal variation in a five-year series of analyses.
Spectroscopy Lab [More info]
Links to Spectroscopy Lab projects to identify and map materials through spectroscopic remote sensing (imaging spectroscopy, hyperspectral imaging, imaging spectrometry, ultraspectral imaging, etc) on the Earth and in space.
Spectroscopy of rocks and minerals, and principles of spectroscopy [More info]
Technical review of the principles of spectroscopy and its use in identifying minerals and other materials.
PDF Summary of Bed-Sediment Measurements Along the Platte River, Nebraska, 1931-2009 [More info]
Studies of the size of bed sediment along the length of a river through time show how the river channel will be affected by development or management efforts.
PDF Sylvatic plague vaccine and management of prairie dogs [More info]
Disease is threatening these previously abundant rodents. We have developed a vaccine that can be delivered using oral baits; our work now shifts to optimizing the distribution of the vaccine.
PDF The Alaska Geochemical Database: v. 1.0 - Geologic Materials [More info]
Geochemical analyses of rocks, mineral separates, lake and stream sediment bulk samples, heavy-mineral concentrates, and soils collected by USGS in Alaska from 1962 through 2009.
The Chesapeake Bay bolide: modern consequences of an ancient cataclysm [More info]
Presentation that the location of Chesapeake Bay may have been predetermined by a Eocene bolide, an extraterrestrial body, impacting the Earth in the vicinity of the Delmarva Peninsula at high velocity and exploding to create a large crater.
The Stanford-U.S. Geological Survey SHRIMP ion microprobe--a tool for micro-scale chemical and isotopic analysis [More info]
Instrument measures elemental abundance and isotopic ratios in samples as small as a few nanograms. Uses include geochronology, geological thermometry, and trace element geochemistry of geological and biological materials.
PDF The U.S. Geological Survey's TRIGA reactor [More info]
USGS operates a low-enriched uranium-fueled, pool-type reactor located at the Denver Federal Center. We use it for analyses of fissile and fissionable isotopes, geochemical analysis, and geochronology.
The chronology for the d18O record from Devils Hole, Nevada, extended into the Mid-Holocene [More info]
This study extends the oxygen isotope record of this important paleoclimate record forward in time to cover more recent history, up to 4,500 years before present.
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