A New Method of Preparing Oriented Thin Sections of Foraminifera and Other Small Paleontologic Specimens

Hagn, Herbert

doi:10.2307/1483814

Cited by 5 publications

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“…Guides to genera and species in thin section are therefore prerequisites to these faunal studies. In order to compile such catalogs, previous workers have been confronted with a number of techniques, some rather laborious, designed for orienting a single specimen on a slide (e.g., Wood, 1948;Hagn, 1953;Morkhoven, 1958;Pessagno, 1960;Nye and others, 1972;Pohl and Browne, 1973). Kennedy and Zeidler (1967) described a method for studying the internal test morphology of foraminifers in which they suggest incorporating 1 to 3 specimens on a single slide.…”

Section: Introductionmentioning

confidence: 99%

A technique to obtain multiple orientations of foraminifers in thin section

Finger

Armstrong²

1984

The Journal of Foraminiferal Research

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A new procedure for obtaining multiple orientations of fossil and Recent foraminifers in thin sections is described. Its main advantage over other methods is that it efficiently provides for random or preferred orientations of representative populations on a single slide. Prior knowledge of sectional views of taxa enhances the microscopist's ability to recognize them in petrographic thin sections, particularly if phenotypic variation and multifarious orientations are accounted for. This technique is particularly useful in preparing taxonomic catalogs which include thin section photographs for study of highly indurated sections, providing that free specimens of the same taxa are accessible from rocks elsewhere. Applications are readily apparent in regions where isochronous faunas transgress facies, or where coeval sediments have undergone differential diagenesis. Proficiency in recognizing foraminifers while examining available petrographic slides could also save the effort of processing additional material specifically for paleontological study.

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Section: Introductionmentioning

confidence: 99%