|Name||Lafferty, St. Clair and Brassfield Limestones|
|Geologic age||Late Silurian to Early Silurian|
Sedimentary > Carbonate > Limestone (Bed)
Sedimentary > Clastic > Mudstone (Bed)
|Comments||Lafferty Limestone-mainly limestone with minor mudstone, St. Clair and Brassfield Limestones-100% bioclastic limestone. Approximatly 220 ft. maximum thickness.|
Craig W.W, Wise, O, and McFarland, J.D. III,1984, A guidebook to the post-St. Peter Ordovician and the Silurian and Devonian rocks of north-central Arkansas: Guidebook - Arkansas Geological Commission, vol.84-1, 49 pp.
|Counties||Independence - Izard - Newton - Searcy - Stone|