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Fig. 1 | Progress in Earth and Planetary Science

Fig. 1

From: In-situ mechanical weakness of subducting sediments beneath a plate boundary décollement in the Nankai Trough

Fig. 1

a Regional tectonic setting of the Muroto transect and IODP site C0023 (Heuer et al. 2017b). Circles show the locations of the targeted site (C0023) and previously drilled ODP sites (808, 1173, and 1174). The black line in the map is the seismic survey line shown in panel b. b Cropped seismic section at the toe portion of the Nankai Trough off Muroto. Original data are available at http://www-udc.ig.utexas.edu/sdc/cruise.php?cruiseIn=ew9907. Site location is shown as a blue line. The green arrows indicate the horizons of the sea floor surface, the top of the décollement zone, and the oceanic basement. Dashed green line shows the location of Site 1174 projected on the cropped seismic section. Abbreviations in the inset include PP Pacific Plate, PSP Philippine Sea Plate, EP Eurasian Plate, mSL meter below sea-level, mbsf meter below seafloor

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