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The Quaternary Lab Facility has expertise, tools, and equipment to carry out lake and peatland sediment coring, core processing and archival storage. This includes a variety of coring systems and platforms, core processing space, tools, and equipment, and walk-in cold room. 

The lab is also designed for high-volume sample pre-treatments for subsequent analyses in other laboratories such as radiocarbon and radiogeneic geochronology, stable isotope geochemistry, sedimentology, and paleoecological analyses. 

 

Field Equipment

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scientists in winter clothes and safety gear examine a percussion piston coring system situated on a frozen lake
Lake sediment coring : A percussion piston coring system is used for >20-m water depth and can obtain up to 20-m of sediment core

 

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two photos of ice coring work on a frozen lake: a hand holds a filled coring tube upright and another core laid horizontally
Lake sediment coring : Manual piston coring is used for lakes <20-m water depth and can obtain up to 15-20m sediment core.

 

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an array tubes containing lake coring samples to be processed
Field collection: One productive coring trip provides >50-m of sediment for analyses and curation. The Quaternary Lab currently stores ~150-m of soft sediment cores collected between 2005 and 2025.

 

 

Lab Equipment

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lab bench with core undergoing magnetic susceptibility measurements
Whole core magnetic susceptibility measurements: Measurements of whole core magnetic susceptibility provide a general stratigraphic profile of sediment layer compositions.

 

 

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core photo stand used in the Quaternary Lab Facility
Sediment core photography stand: Every split sediment core is photographed to document color, structure and stratigraphy.

 

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segmented sediment core from Lake Lucille in Alaska, split into 9 columns, numbered D2 through D10
Sediment core photography: Photography of split sediment cores is calibrated for color/light.

 

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closeup of a 20-centimeter-long section of sediment core showing holes where samples have been removed.
Sediment core sampling: A 25-cm section of a lake sediment core with continuous volumetric samples removed (1 cm3). The remaining cavities are filled with closed cell to preserve the core structures for future work.

 

 

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work area in the USGS Quaternary Lab Facility showing core on table
Sediment core cold storage and sampling area: Lab bench space for core sampling outside of the walk-in cold strorage room.

 

 

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a 1-meter long side-by-side section of core showing sediment layers
Lake sediment core: A freshly opened lake core from Alaska with continuous sediment layers that get older from the top of the core to the bottom. 

 

 

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three high-precision micro-balances covered with plastic sit on laboratory table
High-precision micro-balances 

 

 

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two dissecting microscopes on table with counting device
Dissecting microcopes.

 

 

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