Cohen, who regarded the pipes as of the nature of a mud volcano, and the blue ground as a kimberlite breccia altered by hydrothermal action, thought that the diamond and accompanying minerals had been brought up from deep-seated crystalline schists.
Processes active in hydrothermal plumes modify the gross flux from hydrothermal venting to the oceans.
Arrow worms hunt in the plankton, beard worms live around hydrothermal vents 9000 meters below the sea surface.
Infrared Mineral Analysis Mineral deposits are associated with hydrothermal alteration of the surrounding rocks.
A large IP anomaly between Borland Glen and Coul Burn was interpreted as a steep-sided zone of disseminated pyrite with associated hydrothermal alteration.