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The log of the globally averaged depth of water stored in the crust today (H1) and at times Ho for two values of the total D/H fractionation, ρ = 2.6 and 5.2, and for two possible values of the fractionation occurring during tz, the time when Zagami apatites were crystallized, 1.04 and 1.01. Here, tz is 180 Myr.
