Table 22. Top and base of gas hydrate distribution. Chloride anomaly depth (mbsf) Logging depth (mbsf) Experimental depth (mbsf) Site 994 (depth of water = 2799.1 mbsl): Top 194.95-209.2 212 Base 427.37-456.3 428.8 497 (SW)-529 ( PW) "Note: SW = based on experiments in seawater, and PW = based on experiments in pure water."