thin section

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thin section

[′thin ′sek·shən]
(geology)
A piece of rock or mineral specifically prepared to study its optical properties; the sample is ground to 0.03-millimeter thickness, then polished and placed between two microscope slides. Also known as section.
References in periodicals archive ?
The descriptions of the thin-sections follows the classification systems of Brewer (1964) and Bullock et al.
Arditto (1983) observed embayed quartz grains being invaded by kaolinite in thin-sections of the Pilliga Sandstone.
The absence of MI clays in the thin-sections of Arditto's (1980) Pilliga sandstone samples suggests that their presence in the sandstone at the study site may be due to near-surface weathering, where material within the clay lenses and cracks is being re-worked and deposited against apparent neogenetic smectite.
Thanks to Dr Pat Conaghan for his invaluable assistance with the petrological interpretation and for taking photomicrographs, Forests NSW for permission to work in the Pilliga East State Forest, Mr Tom Bradley for the manufacture of the thin-sections, and the 3 anonymous reviewers for their helpful comments on an earlier version of the manuscript.