Friday, August 6, 2010

Coalified Callixylon Wood

Devonian wood piece probably from a Callixylon log. A little different that what I normally find. It appears to have diamond shaped patterns that might represent the outer surface. They were found in New Albany Shale in Clark County, Indiana. The wood has been coalified or vitrinized by heat and pressure over time.  This fossil appears to be from the Upper Devonian Period.

This image of the specimen viewed with a microscope shows on the left pyrite mixed with the shale and a small coalified fragment showing on the right.