Description: <DIV STYLE="text-align:Left;"><DIV><P><SPAN>Rank and heat content of the Springfield (No. 5) Coal. This map shows regional trends of the rank and heat content of the Springfield Coal. Contours are based on widely-scattered data points and geologic trends. Data are appropriate for use at scales of 1:1,000,000.</SPAN></P></DIV></DIV>