16162 17CC 144.00 150.10 YEAT I 23 1 S RT ALTERED GLASSY BASALT 2 S % SOURCE IS IR, SEE PAGE 370; 3 S TEX SERIATE,POORLY DEVELOPED FLOW STRUCTURE, 4 S MICROPHYRIC* 5 P PLAG 0.03-1.5 6 P % NORMALLY ZONED MICROPHENOS WITH CORES AS CALCIC 7 P % AS SODIC BYTOWNITE,APPROX COMP AN72,RARE EUHEDRAL 8 P % OSCILLATORY ZONING; 9 P AUGITE RARE 0.1-0.4SHEAFLIKE CRYSTALS 10 P % 2VZ=50-15,Z-C=39; 11 P OL 0.05-0.2 12 P % COMPLETELY ALTERED* 13 G GNDMASS 14 G % INCLUDES CPX+PLAG+OP.MINS WITH IDDINGSITE 15 G % ALTERATION PRODUCTS,PLAG XTLLITES COMMONLY 16 G % HAVE GLASS-FILLED CORES; 17 G OP.MINS 18 G % FINELY DIVIDED* 19 A SERP OL 20 A IDDINGS 21 V 0.1-0.9 BASALT,CALCITE, 22 V SERP,CHLORITE 23