. Raleigh County and the western portions of Mercer and Summers counties. 4 8 The detailed crop of the Sewell Coal is shown by appro-priate symbol on Map II. Its thickness and depth are givenin a number of core test holes already given on precedingpages of this Chapter. Its thickness, character, compositionand fuel value at the numerous commercial mines, prospectopenings, country banks and crop exposures, are given in de-tail in the same Chapter along with an estimate by magisterialdistricts of its minable area and tonnage. THE WELCH SANDSTONE. Separated from the Sewell Coal by dark, gray, san
. Raleigh County and the western portions of Mercer and Summers counties. 4 8 The detailed crop of the Sewell Coal is shown by appro-priate symbol on Map II. Its thickness and depth are givenin a number of core test holes already given on precedingpages of this Chapter. Its thickness, character, compositionand fuel value at the numerous commercial mines, prospectopenings, country banks and crop exposures, are given in de-tail in the same Chapter along with an estimate by magisterialdistricts of its minable area and tonnage. THE WELCH SANDSTONE. Separated from the Sewell Coal by dark, gray, sandyshales from 5 to 40 feet thick, there occurs a massive currentbedded, grayish white sandstone, from 0 to 50 feet in thickness,called the Welch Sandstone. This sandstone comes out otSurveyor Creek just south of Lester, and forms abrupt bluffsalong its banks for about one-half mile. Quite frequently thissandstone is replaced by dark, laminated, shale as exposedalong Craborchard Creek near Craborchard P. O. Dr. I. C. White, Vol. II, pp. 657-8. W. Va. Geol. Survey; WEST VIRGINIA GEOLOGICAL SURVEY. 3OI THE WELCH COAL. From 40 to 60 feet under the Sewell Coal bed occurs theWelch Coal. This coal was named by I. C. White from a townof the same name in McDowell County, where the coal ismined on a commercial scale. This is a multiple bedded, soft,columnar coal, from 0 to 5 feet in thickness. Sections of thiscoal are given in the numerous core test records already pub-lished in this Chapter. THE UPPER RALEIGH SANDSTONE. Underneath the Welch Coal occurs a heavy current bed-ded, grayish white to brown sandstone, from 50 to 75 feetthick, that has been named the Upper Raleigh Sandstone, fromRaleigh County, where it was first studied by M. R. Campbellof the United States Geological Survey. Mr. Campbell, how-ever, did not separate the Raleigh Formation (which is about200 feet thick) into its separate members, since he assumedthat it was all one solid sandstone mass. I. C. White foundth
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