. Geology of the Narragansett basin. Geology. RHODE ISLAND COAL MEASURES. 161 The coal from Cranston afforded F. A. Grooch the following analysis: .1 Analysis of coal from Cranston^ Rhode Island. Water Volatile matter Fixed carbon Ash Total Sulphur Specific giavity, at 150-\. These troughs appear to be mainly underlain by coal-bearing shales. The Sockanosset mine in Cranston comes in this section. In the valley north of Providence the shales crop out in a cut in the Old Colony Railroad. A well sunk in Butler street, corner of Bassett street, in 1895, penetrated the Coal Measures. Samples
. Geology of the Narragansett basin. Geology. RHODE ISLAND COAL MEASURES. 161 The coal from Cranston afforded F. A. Grooch the following analysis: .1 Analysis of coal from Cranston^ Rhode Island. Water Volatile matter Fixed carbon Ash Total Sulphur Specific giavity, at 150-\. These troughs appear to be mainly underlain by coal-bearing shales. The Sockanosset mine in Cranston comes in this section. In the valley north of Providence the shales crop out in a cut in the Old Colony Railroad. A well sunk in Butler street, corner of Bassett street, in 1895, penetrated the Coal Measures. Samples of the materials brought up from certain depths were furnished the Survey, through Mr, N. H. Darton, by Mr. C. A. Ray, of East Providence, Rhode Island. The following table sets forth the data obtained from this well. Record of tvell sunh in Frovidence, Rhode Island^ in 1895. Depth in feet. Schist, soft, black, graphitic; with water turniBg to graphitic mud, somewhat too gritty for lubricating purposes 126 Schist, micaceous, carbonaceous, carrying large cubical iron pyrites 176 Schist, carbonaceous 300 Schist, graphitic 341 Grit, or metamorphic sandstone Schist, graphitic, with fragments of vein quartz 419 Goal, anthracitic; very light, with small cubic fracture and some irregular patches of dull black carbon 460 Goal, cut by veins of quartz, subfibrous near walls 475 Goal, with small cubical fracture and more of the dull lusterless carbon, about. 477 Schist, heavy, black, graphitic, pyritiferous, about 477 Schist, fine micaceous, pyritiferous in. layers 492 ^ Report of work done in the Washington laboratory dnring the fiscal year 1883-84: BuU. U. S. Geol. Survey No. 9,1884, p. 18. MON XXXIII 11. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Shaler, Nathaniel Southgate, 1841-1906; Woodworth, Jay Bac
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