Sentence Examples with the word sills

The depth of water on the dock sills varies from 172 ft.

In the south of the island there are sills and dykes of felsite, quartz-porphyry, rhyolite, trachyte and pitchstone.

A few hornblendeschists are metamorphosed gabbros; others have developed from dikes or sills of lamprophyre.

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Immense -sheets of dolerite, gabbro, or allied basic rocks indicate eruptive materials intruded as sills or poured out as lavas contemporaneously with the sedimentary formations among which they lie.