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Figure F1. Downcore profiles of methane and ethane concentration, C1/C2+ ratios, and isotopic compositions (δ13CCH4 and δDCH4) in headspace gas at (A) Site U1380, (B) Site U1412, and (C) Site U1413. Red dashed lines represent lithostratigraphic unit boundaries. Methane and ethane concentration and C1/C2+ ratios are onboard data.

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