Hydrothermal Vent Notes

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Presentation transcript:

Hydrothermal Vent Notes

What is a hydrothermal vent? A geyser on the seafloor. It continuously gushes super-hot (400oC), mineral-rich water that supports a diverse community of organisms.

Formation of a Hydrothermal Vent Step 1 – Sea water seeps into cracks in the sea floor around mid-ocean ridges. Step 2 – Water gets super-heated by molten rock in the asthenosphere.

Step 3 – Super-heated water becomes saturated with minerals from rock in the asthenosphere. Step 4 – Super-heated water is forced upward by heat & pressure & spews from the ocean floor.

Step 5 – Minerals precipitate out of the cooled water & steep chimneys are produced.

Chemosynthesis Process where bacteria converts chemicals from the vents into energy

Hydrothermal Vent Communities Vast “extremophiles” grow near hydrothermal vents where chemosynthetic bacteria are the base of the food chain. Check em out…