It was volcanic in origin, and was now fringed on three sides by coral reefs; some fumaroles
to the northward, and a hot spring, were the only vestiges of the forces that had long since originated it.
Del resto, lo stesso mito eziologico dei Campi Flegrei spiega le solfatare e le fumarole
che tanto attirano i turisti come le esalazioni dei corpi in putrefazione dei Giganti rinchiusi da Eracle nelle viscere della terra (8).
At the same time, metals and aerosol particles are transported by low-temperature gas and precipitate together with native sulfur around fumarole
vents, forming well-known yellow incrustations.
The volcano presents fumarole
activity which is located close to interior of the crater; there is also an important fumarole
field, NW to the outer flank of the PVS.
In addition, the main crater's lake started to dry significantly allowing the fumarole
degassing to occur directly to the atmosphere.
You'll learn firsthand the difference between a hot spring and a fumarole
. And if you're traveling with kids, the five-day Yellowstone for Families programs are great.
"I am a long way from being a geologist, but I can explain in lay terms how a mud pot, fumarole
[steam vent] or a geyser works," Koberlein said.
A fairly constant fumarole
can be seen emanating from the crater (and from our front door).
After day broke on Tuesday morning, TV pictures showed intermittent steam and gases spewing from a fumarole
, or opening, on a side of the Volcano and rivulets of lava coursing down the mountain slopes.
Loppi S and Bonini I (2000) Lichens and mosses as biomonitors of trace elements in areas with thermal springs and fumarole
activity (Mt Amiata, central Italy).
Plumes of smoke, stinking of sulfur, rise out of a nearby fumarole
. As I rest, the previous night, in all its strangeness, replays itself.
Spirit found a fossil fumarole
, where silica-rich water percolated near a volcanically heated vent, and it discovered sulfate salts that may have been deposited much more recently.