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. 2016 Feb 16;113(9):2354–2359. doi: 10.1073/pnas.1516908113

Fig. 1.

Fig. 1.

(A) Bathymetric map and location of sediment cores used in this study (black circles), collected on NBP cruises NBP94-01, NBP99- 02, and NBP15-02 and R/V Hakurei Maru cruise TH95. Squares designate cores that sampled diatomaceous muds resting on terrigenous glacimarine mud with colors corresponding to thickness of the diatomaceous muds from cruises NBP94-01, NBP 95-01, and NBP 99-02. (B) Multibeam swath bathymetric image of deep iceberg furrows in the JOIDES Trough that record the initial episode of ice-shelf collapse. (C) Back-stepping marginal landforms (grounding zone wedges and moraines) imply continuous retreat of the grounding line southward in the JOIDES Trough and westward onto the slope of Crary Bank. Multibeam data shown in B and C were acquired on cruise NBP15-02 using a Kongsberg EM122 in dual-swath mode with 1° × 1° array and 12-kHz frequency. Base map modified from GeoMapApp. Central Basin (CB), Crary Bank (CrB), Eastern Basin (EB), eastern Ross Sea (ERS), Glomar-Challenger Basin (GC), JOIDES Trough (JT), Mawson Bank (MB), McMurdo Sound (McM), North Drygalski Trough (NDT), Pennell Bank (PB), Pennell Trough (PT), Ross Bank (RB), Ross Ice Shelf (RIS), South Drygalski Trough (SDT), Victoria Land Basin (VLB), Western Ross Sea (WRS).