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Progress in Earth and Planetary Science
Fig. 2 | Progress in Earth and Planetary Science

Fig. 2

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

Fig. 2

Photos and X-radiographic positive images of the two modern sclerosponges show skeletal growth bandings comprising alternating high-density (dark) and low-density (light) bands. Slab samples were extracted by cutting along the blue lines. Geochemical analyses were conducted along sampling transects for generating the time series (red lines) and at selected portions of the coeval skeleton for evaluating within-skeleton variation (yellow squares). Radiocarbon measurements were taken at selected skeletal portions (pink squares)

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