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TitleA portable extruder for precision high-resolution subsampling of unconsolidated cores
AuthorPatterson, R T; Nasser, N A; Tremblay, S; Galloway, J MORCID logo
SourceJournal of Paleolimnology 2021 p. 1-7,
Alt SeriesNatural Resources Canada, Contribution Series 20200574
PublisherSpringer Science and Business Media B.V.
Mediapaper; on-line; digital
File formatpdf; html
Subjectssurficial geology/geomorphology; sedimentology; Science and Technology; Nature and Environment; lake sediment cores; core samples; sampling techniques; sampling methods; in-field instrumentation; limnology; paleolimnology; lacustrine sediments
Illustrationsschematic diagrams; photographs
ProgramEnvironmental Geoscience Mackenzie River
Released2021 06 05
AbstractWe developed a portable extruder for precise and accurate high-resolution subsampling of unconsolidated sediment cores. This extruder is capable of producing subsamples at a minimum 1-mm resolution and is designed for easy operation and maintenance in the field. Movement of the threaded extruder rod (½" 8 start acme thread) through the core barrel is driven by a crank wheel graduated in 1-mm increments. This extruder design is particularly useful for obtaining incremental subsamples for applications where high-resolution subsamples of identical size are required (e.g. time series analysis, climate variability, land use change, contamination), and for use in field settings where it is impractical to deploy a freeze corer.
Summary(Plain Language Summary, not published)
A new piece of equipment was designed and built to extrude sediments collected using gravity sediment cores from lake beds. The new extruder can slice sediments from the core in the field at 1-mm increments. The equipment is designed to be portable for field work. This publication describes and illustrates the new sediment extruder device.

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