Figure F3. Details of isochrons inferred from magnetic anomalies near Site 1256. Shading shows normal magnetic polarity, based on digitized reversal boundaries (small circles, after Wilson, 1996). Bold line shows location of Guatemala Basin multichannel seismic tracklines from the site survey conducted in MarchApril 1999. Anomaly ages: 5A = ~12 Ma, 5B = 15 Ma, and 5D = ~17 Ma (from Shipboard Scientific Party, 2003).
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