Cross-section of a vent chimney collected during an Escanaba Trough: Exploring the Seafloor and Oceanic Footprints expedition dive, about 18 centimeters (7 inches) across. Contains the iron-rich mineral pyrrhotite.
Vent Chimney Cross-section
Image courtesy of Escanaba Trough: Exploring the Seafloor and Oceanic Footprints.
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Cross-section of a vent chimney collected during an Escanaba Trough: Exploring the Seafloor and Oceanic Footprints expedition dive, about 18 centimeters (7 inches) across. Contains the iron-rich mineral pyrrhotite.

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