A large mass of dense material in a slow flowing stream, orange colouration throughout the mass of the structure
No identification made yet.
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This might be an iron precipitate where a spring with dissolved iron comes into contact with relatively oxygen rich water.
Might be similar to a chalybeate spring (try googling
Bog iron ore was used by Vikings as a source of iron
Thank you. Having looked up what you suggested I totally agree, how interesting =)
Lat/Lng: 51.3, -0.8
OS grid ref: SU8664