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Progress in Earth and Planetary Science
Fig. 3 | Progress in Earth and Planetary Science

Fig. 3

From: Reconstruction of ocean environment time series since the late nineteenth century using sclerosponge geochemistry in the northwestern subtropical Pacific

Fig. 3

Scanning electron micrograph images of sclerosponges. A well-preserved pristine calcite skeleton is visible. A and B Macrostructural organization of high-Mg calcite skeleton with vertical calicles subdivided by horizontal tabulae. C and D Lamellar microstructure of high-Mg calcite skeleton, the secondary structure of the tabulae and coatings of the tubes, randomly oriented single crystals. E and F Spicular skeleton and spiraster microscleres

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