hornblende schist

American  

noun

Petrography.

1. a variety of schist containing needles of hornblende that lie in parallel planes.

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Etymology

Origin of hornblende schist

First recorded in 1815–25

Example Sentences

He had some very fine teacups of agate and hornblende schist with finely chased silver covers, which I admired very much.

From Project Gutenberg

If hornblende is the most abundant mineral, the same scaly structure shows in a dark rock called hornblende schist, rich in iron.

From Project Gutenberg

Of hornblende schist; these are elongate and intended to be used with both hands. 12-13.

From Project Gutenberg

All night long, stopping only when one or the other fell, they ploughed over basalt and hornblende schist that lacerated their feet, over blanched immensities under the steel moon, across grim, black ridges and through a basin of clay, circled by hills.

From Project Gutenberg

Hornblende schist also occur and a compact felspathic rock in the Suris defile.

From Project Gutenberg