Definitions
Sill [sil]

Sill

[sil]
Sill, Fort: see Fort Sill.
or sheet

In geology, a tabular igneous intrusion emplaced parallel to the bedding of the enclosing rock. Although they may have inclined orientations, nearly horizontal sills are most common. Sills may range from a few inches to hundreds of feet thick and up to hundreds of miles long. They include rock compositions of all types.

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Sill may refer to:

Surname

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