augen

American  

[au-guhn] / ˈaʊ gən /

plural noun

singular

auge

1. Geology. flat, oval, or eye-shaped crystals in metamorphic rock, produced by directed shearing or squeezing.

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augen Scientific  

/ ou′gən /

1. A large mineral grain or grain cluster having the shape of an eye in cross-section and occurring in foliated metamorphic rocks such as schist and gneiss. Augens form when large mineral crystals are sheared and deformed during the process of metamorphism.

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Example Sentences

The low grounds were crossed by the ice descending the Moray Firth in an easterly and south-easterly direction, which carried boulders of granite from Strath Nairn and augen gneiss from Easter Ross.

From Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" by Various

Der Breitmann lok so earnest,     Long and earnest at his foe, Ash if seein troo his augen     To de forty years ago.

From The Breitmann Ballads by Leland, Charles Godfrey

All these types are holocrystalline, and range in texture from coarse granite with augen an inch long down to a fine epidote granite with scarcely visible crystals.

From History and Comprehensive Description of Loudoun County, Virginia by Head, James William