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Figure F7. Uninterpreted and interpreted multichannel seismic reflection Profile IFP-107 across the Wilkes Land shelf and continental slope and base of slope. The profile crosses one of the Wilkes Land shelf banks (where Sites WLSHE-09A,-09B, -07A and -07B are located) and an erosional shelf trough (where sites WLSHE-08A and -08B are located). Topset strata form the banks adjacent to the troughs filled with foreset strata. The two main regional erosional unconformities in this margin are shown in the interpreted profile. Unconformity WL-U3 (Unconformity WL2 in IODP proposal) is interpreted to separate preglacial strata below from glacial strata above. Unconformity WL-U8 (Unconformity WL1 in IODP proposal) is interpreted to mark a change in the glacier regime possibly coinciding with the transition from wet-based to a cold-based more persistent ice sheet. Also shown are the locations of proposed priority sites (red) and alternate sites (blue). See Figure F5 for location of profile. SP = shotpoint.
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