Geological Survey Bulletin, Издање 1526

0.05 million short Adams quadrangle adits average bed or zone beds 14 beds 28 beds In beds Bioturbated Blaine quadrangle Breathitt Formation Brush Creek carbonaceous Clay coal bed Clay rider coal claystone Conemaugh Formation County In beds Data in inch-pound demonstrated resource Inferred demonstrated resource Mined deposits Fire Clay coal Fire Clay rider heat of combustion inch-pound units Inferred resource Total KILOMETERS 5 MILES LAWRENCE JOHNSON Lear coal bed Lee Formation less than 0.05 Limestone Little Fire Clay lost in mining Louisa quadrangle lower delta plain million short tons millions of short Mined and lost Orchard coal zone Original demonstrated resource Peach Orchard coal pyritic quadrangle fig Remaining demonstrated resource report area resource Inferred resource resource Total remaining Richardson coal zone Richardson quadrangle rider coal bed sandstone siltstone silty shale Sitka quadrangle stratigraphic sulfur thick Blaine thick In beds U.S. Bureau U.S. Geological Survey Vanport Whitesburg coal bed