Table 1 List of selected fossil samples with granular structures (traces of CaOx druses).

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

Fossil sample

Selected fossil samples with traces of CaOx druses

Assignment

Type of traces

Size (µm)

Composition

References

Ro-90.1

Quercus neriifolia

Globules, brown

40–50

Organic

Figure 2

Ro-100.5

Salix longa

Globules, yellow

30–35

Organic

Figure 2

Ro-2.2

Sideroxylon salicites

Globules, brown

30–40

Organic

Figures 3, 4

Ro-110.6

Magnoliopsida

Globules, yellow

ca. 30

Organic

Figures 3, 4

Ro-13.3

Nymphaea nymphaeoides

Globules, yellow

20–25

Organic

Figures 3, 5

  

Granules, black

45–55

Mineral + org

 

Ro-59.9

n.n

Empty cavities

15–25

 

Figures 3, 6

Ro-58.5

Zizyphus zizyphoides

Granules, black

40–50

Mineral

Figure 7

  

Globules, yellow

90–100

Organic

 

Ro-4.4

Acer integrilobum

Globules (pollen?)

ca. 60

 

Figure 7

Ro-2.2

(2nd leaf fragment)

Angular particles, black

12–20

Mineral

Figure 7

Ro-101.6

Zizyphus paradisiaca

Granules, black

75–80

Mineral

Suppl. Fig. S1