Keywords: Slaty cleavage.jpg en Metamorphosed shale depicting slaty cleavage Note the grains of mica quartz and ilmenite aligned with a preferred orientation own Geoloshe 2011-05-03 Oriented thin section collected in northern Idaho National Forest from the Wallace formation 47° 3' 43 N; 116° 00' 58 W Cc-zero Uncategorized 2015 March 27 |