Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.13/33848

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Title
Larval caddis-fly nets and retreats: a unique biosedimentary paleocurrent indicator for fossil tufa deposits
Author/Creator
Drysdale, Russell N.;  Carthew, Karen D.;  Taylor, Mark P.
Institution
The University of Newcastle. Faculty of Science & Information Technology, School of Environmental and Life Science
Description
Caddis-fly larvae (Order: Trichoptera; Family: Hydropsychidae; Genus: Cheumatopsyche) build distinctive nets and retreats on the surface of tufa deposits in spring-fed rivers of the Barkly karst, northern Australia. Their activities are confined specifically to swiftly flowing reaches, where the nets and retreats form linear arrays arranged almost perpendicular to stream flow. The arrays become encrusted by calcium carbonate and, when high-velocity conditions are maintained, are succeeded by the next generation of caddis flies. The arrays are well preserved in many fossil tufa deposits, where their alignment and long-section morphology indicate paleoflow direction at the time of caddis activity. This can assist in the paleoenvironmental reconstruction of fossil tufa sequences.
Relation
Sedimentary Geology Vol. 161, Issue 3-4, p. 207-215
Publisher Link
http://dx.doi.org/10.1016/S0037-0738(03)00114-3
Date
2003
Publisher
Elsevier Science BV
Keyword(s)
karst;  tufa;  paleohydrology;  caddis flies;  insect larvae;  Australia
Resource Type
journal article
Identifier
http://hdl.handle.net/1959.13/33848
Identifier
ISSN:0037-0738
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Subject
"Sedimentary Geology"
 
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