Arkansas Novaculite (ARMDa;0)

State	Arkansas
Name	Arkansas Novaculite
Geologic age	Phanerozoic \| Paleozoic \| Devonian-Late Carboniferous Mississippian-Early
Original map label	MDa
Comments	Upper division -massive calcarous novaculite; middle division -dence dark novaculite interbedded with shale; and lower division-massive white nonaculite. Approximately 950 ft. maximum thickness. This area is the "type" occurrence for novaculite. Novaculite refers to a dense cryptocrystalline siliceous sediment similar to chert but characterized by dominance of microcrystalline quartz over chalcedony- distinquished by polygonal triple-point texture.
Primary rock type	novaculite
Secondary rock type	shale
Other rock types
Lithologic constituents	Major Sedimentary > Chemical > Novaculite (Bed) Minor Sedimentary > Clastic > Mudstone > Shale (Bed)
Map references	Haley, B. R., Glick, E. E., Bush, W. V.; Clardy, B. F.; Stone, C. G.; Woodward, M. B., Zachry, D.L., 1993, Geologic Map of Arkansas: U.S.Geological Survey Special Geologic Map. Scale 1:500K
Unit references	Ferguson, J.G., 1920. Outlines of the geology, soils, and minerals of the State of Arkansas: Arkansas State Bureau of Mines, Manufactures and Agriculture,192 pp. Stone, C. G. and Bush, W. V. 1982, Summary of the geology of the eastern Ouachita Mountains, Arkansas: Guidebook - Arkansas Geological Commission, vol.82-2, 24 pp. Scull, B. J., 1958, Origin and occurrence of barite in Arkansas: Ark. Geol. and Conserv. Comm. Inf. Circ. 18, 101 pp.
Geographic coverage	Clark - Garland - Hot Spring - Howard - Montgomery - Pike - Polk - Pulaski - Saline