Methods for preparing and counting biochemical varves

Lotter, André F.; Lemcke, Gerry (1999). Methods for preparing and counting biochemical varves. Boreas, 28(2), pp. 243-252. Wiley-Blackwell 10.1111/j.1502-3885.1999.tb00218.x

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Four different preparation and counting methods for biochemical varves were compared in order to assess counting errors and to standardize these techniques. The properties of two embedding methods, namely the shock-freeze, freeze-dry and the water-acetone-epoxy-exchange method, are discussed. Varve counts were carried out on fresh sediment and on sediment thin-sections, on the latter by manual and by automated counting using image-analysis software. Counting on fresh sediment and using image-analysis generally underestimated the number of varves, especially in sections with inconspicuous varves. A comparison between multiple varve counts carried out by a single analyst and different analysts showed no significant differences in the mean varve counts.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS) > Palaeoecology
08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS)

UniBE Contributor:

Lotter, André F.

Subjects:

500 Science > 580 Plants (Botany)

ISSN:

0300-9483

Publisher:

Wiley-Blackwell

Language:

English

Submitter:

Peter Alfred von Ballmoos-Haas

Date Deposited:

02 Jun 2016 12:04

Last Modified:

02 Jun 2016 12:04

Publisher DOI:

10.1111/j.1502-3885.1999.tb00218.x

BORIS DOI:

10.7892/boris.82778

URI:

https://boris.unibe.ch/id/eprint/82778

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