Jackfork Sandstone

rdf:langString Jackfork Sandstone

rdf:langString Jackfork Sandstone

rdf:langString Quartz from the Jackfork Sandstone

rdf:langString The Jackfork Sandstone, also referred to as the Jackfork Group, is a geologic formation associated with the Ouachita Fold and Thrust Belt exposed in western Arkansas and southeastern Oklahoma. It is named for Jackfork Mountain in Pittsburg and Pushmataha counties, Oklahoma. The Jackfork Sandstone is a thin- to massive-bedded, fine- to coarse-grained, brown, tan, or gray quartzitic sandstone with subordinate brown, silty sandstone and dark gray shale. It outcrops from Pulaski County, Arkansas in the east to Atoka County, Oklahoma in the west, a distance of over 200 miles. It is highly weather-resistant, resulting in a continuous chain of prominent ridges, including Rich Mountain, the second highest natural point in the Ouachita Mountains.

rdf:langString J. A. Taff, 1902

rdf:langString Jackfork Mountain, Pittsburg and Pushmataha Counties, Oklahoma

rdf:langString Shale, conglomerate

rdf:langString Sandstone