Arkansas Novaculite

Includes upper division (Mississippian), middle division (Mississippian and Devonian), and lower division (Devonian)
State Arkansas
Name Arkansas Novaculite
Geologic age Early Mississippian to Late Devonian
Lithologic constituents
Major
Sedimentary > Chemical > Novaculite (Bed)
Minor
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.
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.

NGMDB product
Counties Clark - Garland - Hot Spring - Howard - Montgomery - Pike - Polk - Pulaski - Saline