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I took this pic earlier today and was wondering if anyone can guess what and where it is?
it is pretty much straight from the camera, converted from RAW and took a little bit of saturation out but thats it.
Anyway goodluck

Is it some sort of plant root system/fossil ?

it does seem to be a growth of something, but what and more importantly where?

Judging from the colours and the textures, I'd guess that you pulled a paver or slab of some kind and found the roots growing behind.

Initially, I though tree bark, but I dont think that's right. The white areas could be lime mortar or something like that...

Michael

That is the worse case of tinea I have seen in a long while, I would get yourself to a doctor

Id say an old wall where the root system has been growing under the plaster and some areas of plaster has fallen off, or it could be where roots have grown through the mortar between 2 peices of stone in a wall.

’tis the devil incarnate I tells you. Genuflects in great haste and leaves said thread in a major hurry

I have no idea what Chris just said. He must be speaking in tongues.

My guess: A slime mould in a Petri dish of putrefied milk product.

My guess is behind tiles in the bathroom...

Some interesting guesses,
The most imaginative going to Chris, but i would definatly be seeing a doctor if it were tinea thanks Glen.
AND Andy gets in as i am posting... well done 100% correct
I was ripping tiles out of my bathroom today and found this on the outside of the shower wall (which leaks thus the new tiling)
Anyway it has been good to see so many guesses.
Congrats.
Might be something for the mods to bring in as a different sort of challenge????

Tree Bark