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Related Experiment Video

Updated: Mar 15, 2026

Sediment Core Extrusion Method at Millimeter Resolution Using a Calibrated, Threaded-rod

Sediment Core Extrusion Method at Millimeter Resolution Using a Calibrated, Threaded-rod

Published on: August 17, 2016

Sediment Core Extrusion Method at Millimeter Resolution Using a Calibrated, Threaded-rod.

Patrick T Schwing¹, Isabel C Romero², Rebekka A Larson³

¹College of Marine Science, University of South Florida; pschwing@mail.usf.edu.

Journal of Visualized Experiments : Jove

|September 2, 2016

Summary

This summary is machine-generated.

A new millimeter-scale sediment extrusion method enables sub-annual analysis, significantly improving sediment core sampling resolution. This advancement is crucial for detailed event characterization in aquatic environments.

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Last Updated: Mar 15, 2026

Sediment Core Extrusion Method at Millimeter Resolution Using a Calibrated, Threaded-rod

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Resurrection of Dormant Daphnia magna: Protocol and Applications

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Sediment Core Sectioning and Extraction of Pore Waters under Anoxic Conditions

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Published on: March 7, 2016

Area of Science:

Environmental Science
Geology
Oceanography

Background:

Aquatic sediment core subsampling typically occurs at centimeter or half-centimeter resolution.
This resolution limits sedimentary records to annual to decadal scales, depending on sedimentation rates.
Higher resolution is needed for detailed analysis of short-term environmental events.

Purpose of the Study:

To present a novel millimeter-scale subsampling method for aquatic sediment cores.
To enable sub-annual to monthly resolution analysis of sedimentary records.
To improve the characterization of rapid environmental events in marine sediments.

Main Methods:

Developed a calibrated, threaded-rod extrusion system for sediment cores.
The extruder features an aluminum frame, core tube clamps, threaded rod, and piston.
A sampling collar facilitates millimeter-scale subsample extraction and preservation of unconsolidated samples.

Main Results:

The millimeter-scale extrusion method allows for subsampling at an order of magnitude higher resolution than traditional methods.
Successfully applied the method to sediment cores from the northern Gulf of Mexico.
Demonstrated the necessity of mm-scale sampling for characterizing monthly-scale events on continental slopes.

Conclusions:

The developed extrusion method provides unprecedented millimeter-scale resolution for aquatic sediment core analysis.
This technique is vital for understanding rapid environmental changes and events, such as oil spills.
Millimeter-scale sampling significantly enhances the temporal detail of sedimentary records.