Figure 2 | Scientific Reports

Figure 2

From: Traces of calcium oxalate biomineralization in fossil leaves from late Oligocene maar deposits from Germany

Figure 2

Globular structures in fossil leaves in comparison with CaOx druses of fresh leaves. LM images; surface illumination, 10 × objective. (a) Fossil sample Ro-90_1 (Quercus neriifolia) with large brown globules; the inserted SEM image shows globules in detail. (b) druses of various size and small crystals in a burnt leaf of Quercus variabilis. (c) Fossil sample Ro-100_5 (Salix longa) with yellow transparent globules and many empty cavities, which remained when globules were pulled out during splitting the fossil. (d) Druses and crystals in a burnt leaf of Salix miyabeana. Scale bars: (a–d) = 200 µm; insets (a,c) = 40 µm.

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