Assertion: volcano's vent | /r/HasProperty | black smokers
Facets:
Source sentences:
text: More information on the PIP: Cold seawater (blue) seeps into the seafloor, circulates near a heat source (red) deep beneath the seafloor, becomes hot and buoyant, and flows upward (red to yellow to white) into focused hydrothermal vents (black smokers) and diffuse hydrothermal vents.
text: Some vents, known as "black smokers," spew out a black-colored mixture of iron and sulfide.