Thank you for the clarification. "Ring
of dirt" was not obvious to me. The term
must have been introduced by a geology
student, or a Southern European
geologist who did his own laundry as a
student.
Bruce
Francisco J. Martínez wrote:
>
> Dear all,
>
> Obviously aureole is a beautiful latin-derived word whose meaning is
> obvious for any plain spanish speaker or for a geology student. It is
> pretty much as Francois Guillot explained, and has practically the same
> meaning in any Romance language It just means rim or, following a
> dictionary, "line left around a stain".
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