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Fig. 9 | Progress in Earth and Planetary Science

Fig. 9

From: Multiproxy sedimentological and geochemical analyses across the Lower–Middle Pleistocene boundary: chemostratigraphy and paleoenvironment of the Chiba composite section, central Japan

Fig. 9

Mass accumulation rates (MARs) of some selected materials. a Calculated MAR of marine organic carbon. Gray plots are calculation for individual samples, and black bold lines indicate the average values of the interval between two age controlling points. b Calculated MAR of terrestrial organic carbon. Gray plots are calculation for individual samples, and black bold lines indicate the average values of the interval between two age controlling points. c Calculated MAR of biogenic carbonate. Gray plots are calculation for individual samples, and black bold lines indicate the average values of the interval between two age controlling points. d Calculated MAR of terrigenous material. Gray plots are calculation for individual samples, and black bold lines indicate the average values of the interval between two age controlling points. e High-resolution δ18O records from planktonic (G. bulloides) and f benthic foraminifers from CbCS (Haneda et al. 2020b). Thick lines are 1000 yr moving average profiles. Dashed lines are Marine Isotope Stage and substage boundaries, based on Haneda et al. (2020b). Yellow shades at ~ 764 and 760 ka highlight Millennial Isotopic Oscillation (MIO)-Interstadial 2 and MIO-Interstadial 3, respectively (Haneda et al. 2020b), which correspond with relatively large variations in TOC and TN values. Black arrows indicate the age controlling points (cf. Suganuma et al. 2018, Haneda et al. 2020b)

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