Figure F16. Two-way traveltime thickness maps. A. Sequence I, Pacific plate formation prior to ~5.5 Ma. B. Sequence II, ~5.5–1 Ma. C. Sequence III, ~1 Ma to present. D. Seismic reflection data track lines used in calculation. ASV = Alsek Sea Valley, BT = Bering Trough, KT = Kayak Trough, YSV = Yakutat Sea Valley. From Reece et al. (2011).
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