| Text Description: |
A 22-cm thick coarse-grained pumice-rich tephra layer with a pink-beige color was sampled from the uppermost coal bed in the Fox Creek area. The tephra weathers white. It is overlain, with a sharp boundary, by 18 cm of coal with some very thin (<.5 011) pumice partings, and underlain by 25 cm of coal, also with a sharp boundary. About 50% unaltered and altered delicate pumice fragments mixed with brownish organic-rich material. Five to 7% twinned, murky plagioclase with some sericite alteration. The feldspar grains may be larger than the pumice grains. Trace needle-like hornblende, altered K-spar, euhedral quartz as well as quartz with undulose extinction, zircon, and biotite. |