A 1-day old deposit of fine-grained sulfide and and anhydrite (CaSO4) encrusts the pH-H2S-Temperature sensor at Dive, sending data live from 300 miles off shore. Credit: UW/NSF-OOI/WHOI. V19.

>300°C vent fluids form flame-like structures at the summit of the ~ 55 ft tall hot spring deposit "El Guapo". Credit: UW/NSF-OOI/WHOI; V19.

Streams of super heated hydrothermal fluids issue from the summit of the hot spring deposit "El Guapo". Sulfide worms colonize warm parts of the outer walls, supported by nutrients in the fluids. Credit: UW/NSF-OOI/WHOI; V19.

Filamentous bacteria wave in the "breeze" on the side of Escargot. Credit: UW/NSF-OOI/WHOI; V18.

A small anhydrite-rich chimney rises from the side of the chimney Escargot. Credit: UW/NSF-OOI/WHOI; V19.

A small anhydrite-rich chimney rises from the side of the chimney Escargot. Credit: UW/NSF-OOI/WHOI; V19.

Screen Shot 2019-07-03 at 3.11.16 PM

An active black smoker on the hydrothermal chimney "Mushroom" is surrounded by a dense colony of beautiful tube worms. Credit: UW/NSF-OOI/CSSF

A helathy tubworm bush encases a small chimney adjacent to the Phoenix edifice in ASHES. Credit: UW/NSF-OOI/CSSF/V15.

7-1-19 Photo

APL-sm-logo

SOO-sm-logo

UW-sm-logo

NSF-sm-logo

SOO-sm-logo

UW-sm-logo

APL-sm-logo

NSF-sm-logo

The head of an instrument, built by W. Seyfried and K. Ding, which measures temperature, pH, and H2S is inserted into 309°C flow issuing from the vent called Diva. Credit: UW/NSF-OOI/WHOI; V19.

The head of an instrument that measures temperature, pH, and H2S is inserted into 302°C flow issuing from the vent called Diva. Credit: UW/NSF-OOI/WHOI; V19.

APL-logo-white

nsf1-bw-logo

309°C hot spring fluids spew from the orifice of Diva subsequent to taking a temperature measurement. Credit: UW/NSF-OOI/WHOI;V19.

Jason takes and IGT (isobaric gas-tight) sample in the orifice of the 309°C chimney called Diva in the International District Hydrothermal Field (1520 m). Credit: UW/NSF-OOI/WHOI; V19.

A spider crab and 1500 m water depth walks across a glassy, jumbled sheet flow in the International District vent field. Credit: UW/NSF-OOI/WHOI; V19.

Unhappy tube worms covered in feathery strands of filamentous bacteria and purple-blue protists cover a small area on the active chimney called Escargot in the International District Hydrothermal Field. Credit: UW/NSF-OOI/WHOI; V19.

Jason takes a temperature measurement (left) in the 309°C venting anhydrite- and CO2-rich hot spring called Diva. Oxidized sulfide mineral deposits are to the right. Credit: UW/NSF-OOI/WHOI; V19.