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Mauro Tomassetti

World Member, Fotocommunity 12/2007 Roma

Dead Zone

- Caldara of Manziana - 26/03/2016

- Inside the Volcano -

**The sulphurous bog**
For sulfur dioxide that causes the bubbling water in the swamp.
The central area of the caldara is occupied by a swamp in which the water bubbling in various pools as a result of gaseous emissions of sulfur dioxide. The marsh has been generated as on the basin bottom has settled over time a thick layer of color sulphurous mud between the white and the yellow that being waterproof hold rainwater or from the surrounding streams.
On the springs bubbling phenomenon is a classic example of secondary volcanism. Rainwater, which is coming from ground water, descends deep into the cracks of enriched rocks below in minerals. During this path, meeting areas with a volcanic residual activity and therefore high temperatures, the water heats up, however due to the high pressure can not pass in a gaseous state, but being less dense goes back towards the cooling surface partially up to about 20 ° C. on the surface reached the water, rich in particular of sulfur mineral compounds, meets the surface water, rich in oxygen, and gives rise to a chemical reaction in which the sulfur is deposited releasing gases (sulfur dioxide and carbon dioxide) that cause the classic empyreumatic that characterizes all sulphurous waters therefore also the Caldara of Manziana and do while bubbling water giving the impression that bubble.


Street Art
Street Art
Roberta Tomassetti

Comments 100

  • BGW-photo 27/12/2016 18:15

    Hi Mauro!
    i read these days about recent ruptures, movements and higher temperatures in the other great volcanic area - western of Napoli, Pozzuoli. This Caldera over there is partly used as a Golf Course ... incredible, if you think about, what's underneath . . . I keep all my fingers crossed and hope the best!
    Cari Saluti! Bernd
  • Christos Banos 18/10/2016 11:44

    Excellent realism! Good eye!
  • Bernhard Kuhlmann 28/08/2016 9:39

    Dein Bild zeigt eine Szene, die nachträglich stimmt !
    Gruß Bernd
  • Jim McKinniss 25/04/2016 19:37

    Powerful photo Mauro. Beautifully made.

  • Annelie S. 22/04/2016 15:41

    What an upsetting fate!
    Impressing documentation and photo. Great.
    Greetings, Annelie
  • Manu T. 12/04/2016 19:27

    Impressive scene and thanks for the Info to it.
  • Dragomir Vukovic 09/04/2016 18:17

    great 1 *
  • Rumtreibär 09/04/2016 15:16

    klasse, gefällt mir - dir ein schönes wochenende
    gruß dieter
  • Françoise P 08/04/2016 7:46

    trés beau noir et blanc
  • Johanna C. 07/04/2016 21:04

    This photo tells a story and the B/W is a good choice, great document Mauro
    Best regards, Johanna
  • UK-Photo 07/04/2016 17:10

    Really good!!!!!!!

  • BGW-photo 07/04/2016 13:49

    most impressive b&w with the poor dog over there, Mauro!

    such kind of visible volcanism makes reference to certain areas in Iceland (Hverarönd) and Taiwan, Yangminshan for example... and smell..!
    both we know very good by chance .. ;-)

    ciao, Bernd & Ines
  • s. sabine krause 07/04/2016 9:16

    the mortal remains of the unlucky dog… so utterly defenseless and exposed, so FINAL and beyond all pain, so archaic somehow… that it's incredibly moving! if i listen closely, i can hear eternity sigh, and it isn't hard to imagine the dog – so full of weighty meaning! – turn into a fossil dug up and analyzed one day by some distant descendants of ours… greetings, sabine. p.s.: very interesting to read about the primeval landscape of the caldara di manziana!


Folders Black&White
Clicks 2,277


Camera X-T1
Lens XF23mmF1.4 R
Aperture 13
Exposure time 1/250
Focus length 23.0 mm
ISO 200

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