Figure 5. Contours of estimated average sulfur content (percent wt., as-received basis) for blocks 2.7 mi (4.34 km) on a side, for the remaining un-mined Pittsburgh coal resources in resource area A (see Figure 1).

Figure 5. Contours of estimated average sulfur content (percent wt., as-received basis) for blocks 2.7 mi (4.34 km) on a side, for the remaining un-mined Pittsburgh coal resources in resource area A (see Figure 1).