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Progress in Earth and Planetary Science
Fig. 18 | Progress in Earth and Planetary Science

Fig. 18

From: Paleoceanography and dinoflagellate cyst stratigraphy across the Lower–Middle Pleistocene Subseries (Calabrian–Chibanian Stage) boundary at the Chiba composite section, Japan

Fig. 18

Dinoflagellate cyst synthetic diagram (this study) compared with the foraminiferal δ18O records of the Chiba composite section. a Insolation at 65°N in June, and precession and obliquity parameters (Laskar et al. 2004). b Planktonic (G. bulloides) and benthic foraminiferal δ18O records of the Chiba composite section (Haneda et al. 2020b) based on the age model of Suganuma et al. (2018). c Dominant palynofacies component (brown line, terrestrial; blue line, marine amorphous organic matter [AOM]) from Fig. 16. d Dinoflagellate cyst synthetic diagram showing the most abundant taxa and local assemblage biozonation (this study). Substage classification of MIS 19 with stadials (MIS 19-s1–s4) and interstadials (MIS 19-i1–i4) follows Haneda et al. (2020b) but with modified labeling and MIS 19a benthic isotope oscillations (MIS 19a-o1 to MIS 19a-o4) following Head (2021). Blue arrow marks the suggested position of a Younger Dryas-type cooling event according to Suganuma et al. (2018)

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