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44 THE STATE GEOLOGICAL SURVEYS AND Kentucky coal field, an area of 10,500~squa.re miles, has been completed since 1920 on essentially one keybed-the No. 4 coal of the Hazard field, known as the :Firecla.y (Pottsville). These maps have been issued on a scale of ~ inch to the mile, with a contour interval of 10 feet. In addi- tion, the subsurface structure of five adjacent counties with Boyd, Lawrence, Johnson, Martin, and Floyd in the Big Sandy drainage basin in the eastern part of the State has been mapped and published, the key- bed being selected in most cases near the producing sand. Structural maps have also been made and published for many other parts of the State, on both a county and a regional basis. The Kentucky Geological Survey now has 360 separate editions of maps printed and engraved, and in process of distribution. PRESENT MAIN LINES OF WORK The Kentucky Geological Survey is now engaged in extending the area.l and structural (fault pattern) mapping of the State on standard stratigraphic subdivisions, the maps being published in standard colors. During the coming field season of 1929, it is planned to map the areal geology of all the counties in the Jackson Purchase region, that is, the entire area west of the Tennessee River, involving the Cretaceous, Eocene, Pliocene, Pleistocene, and Recent formations. Detailed structural and areal work will be continued in the Western Kentucky fluorspa.r field and along the periphery of the Western Kentucky coal field in the Mis- sissippian formations. A new base map of Kentucky on a scale of 1: 500,- 000 compiled ~1925-1928 ~ from detailed topographic quadrangles, county, and regional maps for all parts of the State was published in 1928. On this base a new geological map of :lientucky has been prepared from new detailed outcrop surveys and will be published during July, 1929. Detailed areal and structural work on a county unit and qua.d- rangle basis as occasion may demand will be continued elsewhere in Kentucky, principally within the Blue Grass region and along the Knob belt which surrounds it. It is interesting to note that since its establishment in 1854, the six separate official geological surveys. of Kentucky have Published 83 stand- ard library bound volumes and as many or more pamphlets and reports, all of which total 26,976 pages. LOUISIANA * The Louisiana Soil and Geological Survey passed out of existence with the death of Professor Emerson, twelve years ago. For the past ten years * Information furnished by Henry V. lIowe, March, 1932.
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