data plots during our Tow-Yos in the 24°S area of the Central
Indian Rift valley. The left plot shows the distribution of temperature
(°C) and salinity (parts per thousand). The right plot shows density
and particles (light transmission). The vertical axis is water depth.
Some of the spikes or jagged parts of the colored lines
indicate warmer water. The warm water is buoyant - it is still rising
up from a seafloor vent carrying loads of particles. We followed the
signals shown on these plots for miles until we finally found a stronger
signal. This told us that the seafloor vents were below us.