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Low Power Magnification Photography of Thin Sections: NOTES
S. Duncan Heron, Jr.
Thin sections of any type of rock can be photographed at very low magnification (1 to 3) using a 35 mm single lens reflex camera, bellows extension, slide copying attachment, and various filters. Transmitted plain, polarized, or infrared radiation may be used. The infrared radiation is most useful for studying bioturbate textures, especially when traces of organic matter are still retained in the rock. Examples of bioturbate structures from the Oligocene Cooper Marl are given.
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