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

Fig. 3

From: Calcareous nannofossil biostratigraphy of the Lower–Middle Pleistocene boundary of the GSSP, Chiba composite section in the Kokumoto Formation, Kazusa Group, central Japan, and implications for sea-surface environmental changes

Fig. 3

Calcareous nannofossil biostratigraphy by Sato et al. (1988). The relative abundance of main nannofossil species (from Sato et al. 1988; Sato 1989) is also shown. A dotted line in the Chonan Formation indicates reworked specimens. The numerical ages of the biohorizons (Anthonissen and Ogg 2012) are also shown. The last occurrence (LAD) of Pseudoemiliania lacunosa are situated above the section

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