This substance lies underneath so-called false bottoms, which form through double diffusion. This substance may become trapped in pockets following its namesake rejection. It’s not related to thermodynamics, but the potential density of this substance is displayed on T-S diagrams. Deviations from this substance’s (10[1])VSMOW standard (10[1])are used to identify periods during which it becomes enriched with oxygen-18 due to low temperatures. (-5[1])This dense substance lies below (-5[1])Ghyben–Herzberg lenses, which share their name with an equation used to model its “intrusion.” The (-5[1])SMOC (-5[1])(“S-mock”) and AMOC (“A-mock”) drive the thermohaline circulation (10[1])of this substance. (-5[1])Reverse osmosis (10[1]-5[1])is often used to purify, (10[1]-5[1])for 10 points, (-5[1])what substance that mixes with a fresh counterpart in estuaries? ■END■ (10[7])