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Progress in Earth and Planetary Science
Fig. 14 | Progress in Earth and Planetary Science

Fig. 14

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

Fig. 14

An acritarch (a–c), a presumed reworked dinoflagellate cyst (d–f), and palynofacies (g, h) from the Chiba composite section. Max. dia. = maximum diameter. EF = England Finder reference. a–c Nannobarbophora walldalei, uncertain view at upper, mid-, and lower foci; central body max. dia. 29 μm; sample TB2 30, slide 2 (10 μm), EF E15/3. d–f Cleistosphaeridium placacanthum (presumed reworked), apical view at upper, mid- and lower foci showing granulate central body surface with well-developed penitabular ridges; central body max. dia. 53 μm; sample TB 114, slide 1 (10 μm), EF P16/4. g, h Organic residue sieved at 10 μm showing (g) terrestrially dominated (sample TB2 105, slide 1, EF D21/4) and (h) AOM-dominated (sample TB 14, slide 1, EF D22/0) palynofacies; cyst = dinoflagellate cyst, AOM = amorphous organic matter, PT = plant tissues (woody tissues and cuticle); scale bar = 20 μm

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