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Hi everyone, am new here. Just found this today in my horses field and wondered if anyone has any idea what it could be? It mite be nothing but looked interesting hence i brought it home. Any ideas welcome, thanks
I don't think it is significant.
It is a lump of fine-grained rock, probably sedimentary, exhibiting a degree of onion-peel weathing (exfoliation).
That may be partly related to its concretionary nature.
See my description of concretions here