State Geology Survey 1854 - 1859
The best exposures I have seen of the upper division, are on Big Sandy, in Lawrence county, above the mouth of its Louisa fork; and in Floyd county, in the vicinity of Prestonsburg.
In the former of these counties, south of Louisa, in a space of about three hundred and fifty  feet, from the bed of the Big Sandy, I find from six to seven beds of coal; one near high water, or from forty to fifty feet above the first, and from three to four feet thick; a third bed about sixty feet higher in the hills, two feet to two feet and a half thick. There
is also said to be a twenty-inch bed about midway of the space between the fourth last coals, i.e. thirty feet under the last mentioned bed. A fourth bed, about fifty  feet above the third bed, equivalent to the middle Gavit coal, which is four feet two inches, with a clay parting of one to three inches, eight inches from the top of the coal. A fifth thin bed, about fifty feet higher than the upper Gavit bed, which is from three and a half to four feet thick; a sixth, or Cannel coal bed, situated about one hundred and forty  to one hundred and fifty  feet above the fourth, and within fifty  to one hundred  feet to the top of the hills; of this latter bed I did not have an opportunity of seeing the outcrop, but have reasons to believe, from the statements of several of the inhabitants of Lawrence county, that it exists, but probably not of workable thickness.
At Mellenburg, or the Peach Orchard coal mines, on Big Sandy, but one main caol has been opened at an elevation of two hundred and two  feet above low water of Big Sandy, with two thin coals under it - one at thirty  feet above low water, and the other from seventy-five  to eighty  feet above low water, or forty-five  to fifty  feet above the lower bed.
Though the whole heights of the hills on this part of Big Sandy is 600  feet, no openings have yet been discovered above the main bed, but I am inclined to believe, from what I have seen elsewhere in Lawrence county, that by a proper search some might be found, and perhaps of practical value.
Page 431, Geology Report
Source: [First-] fourth report of the Geological survey in Kentucky made during the years 1854 to 1859, by David Dale Owen, principal geologist, Kentucky State Geologist. A. G. Hodges, state printer, 1856-61
Transcribed into electronic format for LCHS by Marlitta H. Perkins.
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