|Geologic age||Early Mississippian to Late Devonian|
Sedimentary > Chemical > Novaculite (Bed)
Sedimentary > Clastic > Mudstone > Shale (Bed)
|Comments||Upper division -massive calcarous novaculite; middle division -dence dark novaculite interbedded with shale; and lower division-massive white nonaculite. Approximatly 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.|
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.
|Counties||Clark - Garland - Hot Spring - Howard - Montgomery - Pike - Polk - Pulaski - Saline|