"result in single plant stem, say a 4 to 6 inch Calamite Lepidodendron. The theory of converting plant material as marsh gas it seems to me is largely erroneous. Due the formation of underground work here at the mines - for plants - I am sure. Promised together some forms before I leave. Sam Bray said that the Coal Seam is 3 feet 6 inches of good coal and that they are down on the heel 2800 feet. In all this distance the Coal has not varied 1 inch in thickness. This shows how uniform this Coal seam is and how uniform the marsh was. Of course it only means one-half mile square, in area.