Continental Margins and Ocean Basins. Bathymetry. February 2000 a map of the surface of our planetary neighbor mars was completed. Bathymetry: is the discovery and study of our ocean floor. (Bathy= deep, Meter = measure).
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Hydrothermal Vents- spring of hot, mineral- & gas-rich seawater found on some oceanic ridges in zones of active seafloor spreading
Black smokers- water descends through fissures & cracks in ridge floor, comes in contact with very hot rocks (assoc. with active seafloor spreading), superheated & chemically active water dissolves minerals & gases, escapes upwards through vents b/c of convection