Digital water-level elevation contours for the Vamoosa-Ada aquifer in east-central Oklahoma

The Vamoosa-Ada aquifer is defined in a ground-water report as consisting principally of the rocks of the Late Pennsylvanian-age Vamoosa Formation and overlying Ada Group. The Vamoosa-Ada aquifer consists of a complex sequence of fine- to very fine-grained sandstone, siltstone, shale, and conglomerate interbedded with very thin limestones. The water-yielding capabilities of the aquifer are generally controlled by lateral and vertical distribution of the sandstone beds and their physical characteristics.

The Vamoosa-Ada aquifer is unconfined where it outcrops in about an 1,700-square-mile area. The water-level elevation contours were digitized from a mylar map, at a scale of 1:250,000, used to publish a plate in a ground-water report about the Vamoosa-Ada aquifer. The water-level elevation contours in this data set extend west of the aquifer outcrop to areas where Vanoss Group rocks overlie the Ada Group.

The data set also includes a water-level elevation contour for a terrace deposit east of the aquifer outcrop near the North Canadian River. Water-level elevations range from 800 to 1,000 feet above sea level for the Vamoosa-Ada aquifer.