augen schist

augen schist

[′au̇·gən ‚shist]
(petrology)
A mylonitic rock characterized by the presence of recrystallization.
References in periodicals archive ?
All three holes intersected interbedded units of massive grey aphyric ryholite and intermediate to felsic tuffaceous rocks and bottomed in K-feldspar-quartz augen schist.