Strange pattern on a concrete paved surface

  • #1
I found this funny pattern in a slightly damp concrete paved parking area. Any ideas what it is?


strange pattern.jpg



Detail :

strange_1.jpg
 
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Answers and Replies

  • #3
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Can be either white mold (growing from some organic remains below the concrete) or efflorescence. Can't tell by that picture. Maybe the former, since looks organic and kind of organized too.
 
  • #4
Borek
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Slime mold?
 
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  • #5
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Reminded me of Lichtenberg figures.

Looks like some living organism, but it is following a great pattern while growing. I can see some blue spots elsewhere on the concrete surface.

A Google search reveals that bacterial growth may sometimes follow fractal geometry.

Do you know any lab where you can send a sample for finding out what organism it is?
 
  • #6
Do you know any lab where you can send a sample for finding out what organism it is?
Maybe I can contact the biology department at Gujarat University (I'm in Ahmedabad, India).

But that may take a while, so I could try putting a sample into a dish with some soil and humus to keep the colony active. But it may not be there when I go there tomorrow because it's a place where people are likely to step on it (it's between two parking bays).
 
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  • #7
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Don't handle without gloves. It might be unsafe
 
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  • #8
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Appear to be a salt efflorescence, nothing unusual or strange.
 
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  • #9
BillTre
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I like it. Very photogenic.
I'm betting its organic, but can't tell from the pictures.

See what it looks like in a day or two.
In the picture, it looks like it is on top of the cement rather than within it. Yes?
It may be getting bigger, possibly growing but could be an inorganic getting larger too.
If its a slime mold aggregating (or perhaps a fungus coming together to make a mushroom or other fruiting body), it could get smaller and more concentrated where it is converging to.
It might be fluorescent, try a black lite at night.
Biological stains would also be interesting if you have any around.
I like @Swamp Thing's idea of putting a sample on potential media.
Put some dilute bleach on a small part of it and see what happens. Should kill live things.
Does water dissolve it? Inorganic salts?
Have a decent microscope? If so put some under that and look for cells.
 
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  • #10
I managed to shoot this makeshift macro:


If it is mineral efflorescence, how would those globules form? One possibility is that the tree branches out into whiskery dendrites, but at some point some droplets of dew nucleate onto the tips of the whiskers. A little salt could dissolve into the dew, which leaves a globule when it evaporates.

Or maybe it's just that the COVID has teamed up with some fungus or mold ... the Day of the Dendrids?
 
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  • #11
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Looks organic to me.
 
  • #12
Spinnor
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A Google image search for 'slime molds" came up with,

1601413657278.png


Some similarities.

1601413890694.png


1601414059075.png



See if it dissolves in water, I don't think a slime mold would but the efflorescence would. The textures of both would be quite different, one is slimy the other is a dryish powder?
 
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