Ground-water quality assessment of the central Oklahoma aquifer, Oklahoma: results of investigations

Stream-water and groundwater quality in and near the Citizen Potawatomi Nation Tribal Jurisdictional Area, Pottawatomie County, Oklahoma, 2012-13

“…The Permian-aged bedrock aquifers in the CPN TJA are part of the Central Oklahoma aquifer (COA), a complex of rocks that is used extensively in central Oklahoma as a supply of groundwater (Christenson and Havens, 1998). The COA in the CPN TJA consists of the Garber-Wellington aquifer and the Chase, Council Grove, and Admire Groups, undivided.…”

“…The stratigraphic contact between these two rock units is gradational, and the discernment of where one begins and the other ends is difficult (Parkhurst and others, 1996;Smith and others, 2009). Both units were deposited in a fluvial-deltaic environment at the edge of a shallow sea that periodically covered this part of Oklahoma during the Permian period (Christenson and Havens, 1998). In general, the lithologies of the Garber Sandstone and Wellington Formation are highly variable over short distances, horizontally and with depth.…”

“…In general, the lithologies of the Garber Sandstone and Wellington Formation are highly variable over short distances, horizontally and with depth. The bedrock units dip in a westerly direction at about 50 feet per mile (ft/mi) (Christenson and Havens, 1998) and become more shaly (fine grained) in an easterly direction and with depth (Schlottmann and others, 1998).…”

“…The Chase, Council Grove, and Admire Groups (undivided) (referred to as the "Oscar Group" by Bingham and Moore, 1975) underlie the Wellington Formation and are the easternmost groups of rocks that are part of the COA. At the land surface, these groups of rocks are similar in lithology, consisting of fine-grained sandstone, shale, and thin limestone (Christenson and Havens, 1998). Well yields are smaller in the Chase, Council Grove, and Admire Groups than in the Wellington Formation, generally less than 25 gallons per minute (gal/min) (Bingham and Moore, 1975).…”

“…Numerous sources of information describe the hydrogeology of the COA and groundwater quality in the CPN TJA (Bingham and Moore, 1975;Christenson and Havens, 1998;Oklahoma Water Resources Board, 2013a). Andrews and others (2013) compiled and summarized historical groundwaterquality data for the CPN TJA.…”