EHODE IBLAKD COAL MBASUBES. 171 



Geological column of diamond-drill hole made for the SeeTconk Goal Mining Company 



on their anthracite coal lands^ etc. — Oontinued. 



Peet. Inches. 



Argillaceous rock, variegated, lower part thin layers of slate 12 



Bluisli sandstone ... - 8 



Sandstone, mustard-seed grit 24 



Compact gray sandstone 7 4 



Slate and sandstone alternating 8 6 



Sandstone and grit alternating, mustard-seed grit 12 9 



Sandstone, coarse and fine, micaceouSj thin seams of slate 8 4 



Argillaceous slates containing thin seams of coal and impressions of plants, 9 4. 5 



Coarse and fi.ne micaceous sandstones (depth, 288.5 feet) 6 9. 5 



Conglomerate 32 4 



Eed conglomerate rockj slate containing streaks of coal; Gray sandstones 



and coal slates alternating 8 3 



Gray sandstones, coarse and fine micaceous, separated by argillaceous binds . 22 3 



Eock binds and sandstones containing veins of quartz 18 



Coal slates containing impressions of coal plants j lower parts dark sand- 

 stone - 7 7 



Gray sandstone and argillaceous rock 8 



Dark-colored sandstone and carbonaceous slate . . - - 7 



Sandstone, micaceous, and coal slates containing impressions of coal plants. 10 



Coarse sandstone, micaceous 8 10 



Coarse sandstone, lower part containing thin seams of anthracite; sandstone, 



micaceous and conglomeratic - 14 5 



Conglomerate (depth, 425.15 feet) 7 



Gray sandstone, micaceous 13 4 



Conglomerate - . - - 4 9 



Grav sandstone and slate - 3 11 



Gray sandstone, micaceous, containing slate with plant impressions 8 2 



Sandstone and slate, alternating, containing thin seams of coal 4 7 



Fine-grained sandstone containing thin seams of slate and coal with impres- 

 sions - 5 3 



Coal slates containing coal plants; upper part sandy (depth, 479.15 feet). . . 7 8 



Gray sandstone, fine grained, micaceous 13 6 



Dark-gray grit rock , 7 9 



Slate and sandstone, 2 feet; dark- gray grit, 3 feet 4 inches; sandstone and 



seam of slate, 3 feet 3 inches 8 7 



Gray sandstone, 3 feet 5 inches; binds, 6 feet 7 inches 10 



Gray sandstone * 6 6 



Binds, 2 feet 7 inches; slate containing plant impressions; supposed thin 



seam of coal, 2 feet 6 inches (depth, 531 feet 2.5 inches) 5 1 



