Print this pageAbstract: Trends and Origins of Ordovician Sandstones, Northern Arkansas
Surface and subsurface stratigraphic studies of the Calico Rock and Newton sandstones of the Everton Formation and the St. Peter Sandstone of northern Arkansas show them to be lobate sands as much as 200 ft thick.
High porosities and permeabilities as well as equivalency with the productive Simpson Group in Oklahoma suggest potential reservoirs. Isopach maps establish stratigraphic trends.
Depositional environments and geologic histories are derived from the areal geometry, thickness, and fabric of the sandstones and from a study of subjacent and superjacent rock units. These data suggest the sands accumulated in a barrier island-shelf sea complex. The sands were reworked partly and modified by marine processes in transgressing seas.
APG Search and Discovery Article #90974©1975 AAPG Mid-Continent Section Meeting, Wichita, Kansas