DescriptionRhynia stem – superficial view with scale.jpg
English: Cross section of a Rhynia stem, viewed on the surface of the rock specimen shown at File:Rhynie chert with Rhynia 1.png, with a scale bar added. Because chert is translucent, some material underneath the surface shows through, making the image appear unfocused when compared with the thin section shown at File:Rhynia stem.jpg.
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