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Strange Formations


Strange Formations
Photo Information
Copyright: Julie Wyatt (j_wyatt) Gold Star Critiquer/Silver Workshop Editor/Gold Note Writer [C: 146 W: 44 N: 211] (1229)
Genre: Fungi
Medium: Color
Date Taken: 2004-11-21
Categories: Fungi
Camera: Canon Powershot G2
Photo Version: Original Version
Date Submitted: 2005-02-21 0:03
Viewed: 1822
Points: 8
[Note Guidelines] Photographer's Note
These were some very strange formations formed on the side and underneith side of a bridge in Florence Italy. I doubt they are Fungi but I couldn't find a category that really fit. They seemed to me to be mineral formations from centuries of dripping water over this bridge. There was still one or two of the alcoves under the bridge which were still wet and dripping.
Andrieux, LCannon, LordPotty has marked this note useful
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Discussions
ThreadThread Starter Messages Updated
To LordPotty: Wonderingpgmoni 1 03-02 05:18
To LordPotty: I've never seen anything likej_wyatt 1 02-28 09:13
To Robbrown: I think you're probably right about thej_wyatt 1 02-27 19:42
To Andrieux: I was fortunate that I got toj_wyatt 1 02-21 09:33
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Critiques [Translate]

Beatutiful.
I wanna go to Italy so bad...
Im imagine how many photos i can take there.
Congrats.... and thanks for share

Great shot Julie!
I love your photo. There is interesting plants and very nice view. With your note it is superb!

Joanna

hi Julie just trying to catch-up on some of the posted images this one caught my eye. definatley a calcite deposition coming from the rain water running through the limestone in this construction. I cannt rember but in this sort of think that an algae is invovled in the way it comes back out of soulution and is why its so gnarly in shape rather than smooth than you would normally see in a cave. the person to ask would be Steve (Lordpotty) he seems to know quiet a bit about this sort of thing. TFS

Hi Julie. Robb told me to check this out...so here I am. These are definitely stalactites, just like you find in caves.
When rain falls on the ground and comes into contact with organic matter it absorbs carbon dioxide turning it into a solution of carbonic acid,This seeps into fissures in the limestone (calcium carbonate) and dissolves the limestone as it goes. When it emerges at the other side, the CO2 is released from the solution, causing the dissolved limestone to solidify again as calcite crystals.
Often stalactites will form as a ring around a pore in the rock,which will grow successive layers until it becomes a long thin hollow straw stalactite.
Water flowing along a sloping roof can form curtains or shawls, and trickling or running down a wall can form flowstone formations.
Various colours can be introduced,for instance brown from iron oxide (rust) or black from manganese oxide.
Various textures also occur,depending on atmospheric conditions (carbon dioxide content etc) and the chemical makeup of the minerals in solution.
I've never really seen stals like this on buildings before (just tiny ones on old water tanks etc)
They make for a very interesting shot.
Thanks for posting this one.

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