EHODE ISLAND COAL MEASURES. 171 



Geological column of diamond-drill hole made for the Seekonk Coal Mining Company 

 on their anthracite coal lands, etc. — Continued. 



Feet. Iucbes. 



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



Bluish 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, micaceous, thin seams of slate 8 4 



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



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



Conglomerate 32 4 



Bed conglomerate rock; slate containing streaks of coal; Gray sandstones 



and coal slates alternating 8 3 



G-ray 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 ; 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 o 



Gray sandstone, micaceous 13 4 



Conglomerate 4 9 



Gray 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 



