Index No: NBM053680; Collected By: ; Sample Type: hand sample; Notes: Rock chip sample of altered lithic-rich tuff or pumiceous lava breccia of unit Td from south end of alunite ridge of samples 5205, 5350. Complete replacement by alunite + quartz, very rich in alunite with individual crystals < 2 mm, porous, with locally sparse, late quartz crystals <1 cm as fracture coatings. -Weiss, 6/25/95.