Index No: MRTN103240; Collected By: Thomas B. Nolan; Sample Type: hand sample; thin section; Notes: Location taken from Belmont Mine shaft; White inclusions in a grayish groundmass. A breccia of apparently angular to subrounded particles of glass and fragments of TF, now slightly sericitized and kaolinized, with a groundmass largely of quartz with lesser amounts of sericite and a little adularia. It is possible that this might all be a quartz replacement of a glass, but in many places the small grains of quartz appear clastic and there is a bedding suggested by greater preponderance of quartz grains in one portion of slide and glass in the other. The glass has index slightly lower than C.B. Sericite often borders the glass fragments, [...]