Just under the soil there’s a white chalky looking substance. What is it, please?

On closer inspection it looks like threads of white compacted together.

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1 Comment To "Just under the soil there’s a white chalky looking substance. What is it, please?"

#1 Comment By drtreelove On 02/22/2019 @ 9:21 pm

I suspect it is fungal mycelium growing on a layer of organic matter.
https://en.wikipedia.org/wiki/Mycelium ^[1]

But there is a chance it is a natural high calcium chalky substance, or layer of spilled or dumped cement spoils or paint from a building project.

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[1] https://en.wikipedia.org/wiki/Mycelium: https://en.wikipedia.org/wiki/Mycelium

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