Text Description: |
CC2 is dark brown, medium- to coarse-grained, and was sampled from a 150 cm coal bed. There are no other tephra layers in the coal. Mostly plagioclase and very altered bubblewall shards and pumice fragments (20-25% feldspar and 20-25% altered glass). The plagioclase is angular to rounded, and zoned and twinned. Some glass may be unaltered. Three to 4% stubby to euhadral hornblende with weak pleochroism. Some hornblende grains appear slightly rounded. One to 2% opaques, and trace k-spar, quartz, organic material, zircon, and epidote. |