Figure F4. (A) Cl– concentrations and (B) deltaD and (C) delta18O values in the eastern slope basin of Hydrate Ridge. Boxes denote increases of Cl–, deltaD, and delta18O within Holocene and Pleistocene sediments caused by ice sheet development during the Last Glacial Maximum. Dashed lines in B indicate best-fit average temperatures/depths of hydrogen isotopic fractionation between clay and water, which are increasing eastward. Dashed lines in C indicate predicted background levels of delta18O after correction for clay mineral dehydration. SMOW = Standard Mean Ocean Water.

Figure F4. (A) Cl^– concentrations and (B)

D and (C)

¹⁸O values in the eastern slope basin of Hydrate Ridge. Boxes denote increases of Cl^–,

D, and

¹⁸O within Holocene and Pleistocene sediments caused by ice sheet development during the Last Glacial Maximum. Dashed lines in B indicate best-fit average temperatures/depths of hydrogen isotopic fractionation between clay and water, which are increasing eastward. Dashed lines in C indicate predicted background levels of

¹⁸O after correction for clay mineral dehydration. SMOW = Standard Mean Ocean Water.