This substance lies underneath so-called false bottoms, which form through double diffusion. This substance may become trapped in pockets following its namesake rejection. (10[2])It’s not related to thermodynamics, but the potential density of this substance is displayed on T-S diagrams. Deviations from this substance’s VSMOW standard are used to identify periods during which it becomes enriched with oxygen-18 (-5[1])due (-5[1])to low temperatures. This dense substance lies below Ghyben–Herzberg lenses, which share their name with an equation used to model its “intrusion.” The SMOC (“S-mock”) and AMOC (“A-mock”) drive the thermohaline circulation of this substance. (10[1]-5[1])Reverse (-5[1])osmosis (10[1])is often (10[1])used to purify, (10[1]-5[1])for 10 points, what substance that mixes with a fresh counterpart in estuaries? ■END■ (10[6])