The hydrogeology of the Cannon Air Force Base (AFB) in Curry County, is being investigated to better understand the mechanics of groundwater flow in the area, including the identification of preferential groundwater flow paths. Mapping the top of the Dockum Group was done to help identify potential paleochannels that may have eroded the surface of the Dockum Group and subsequently filled in with coarse-grained sediments of the overlying Ogallala Formation. The Dockum Group is composed of sandstone, siltstone, mudstone, and shale that were originally deposited in fluvial and lacustrine environments (McGowen and others, 1979). The upper part of the Dockum Group is a thick layer of red clay referred to locally as the "red beds" and is a confining unit between the Ogallala aquifer and the Dockum aquifer. The lower part of the Ogallala Formation consists of heterogeneous sequences of gravel and coarse-grained sand that grades upward into sand, silt, and clay (Peckham and Ashworth, 1993). Paleochannels in the top part of the Dockum Group are believed to be preferential flow paths for groundwater in the area. The U.S. Geological Survey (USGS) in cooperation with the U.S. Air Force Civil Engineer Center (AFCEC) used surface geophysical resistivity methods to analyze the subsurface hydrogeology and map potential paleochannels within the Dockum Group, which can further aid in the understanding of the groundwater flow beneath Cannon AFB. This data release contains the results of 60 time-domain electromagnetic (TDEM) soundings and two electrical resistivity tomography (ERT) profiles collected on the AFB that will be used map the top of the Dockum Group.
|Title||Surface Geophysical Data Used for Mapping the Top of the Dockum Group on Cannon Air Force Base in Curry County, New Mexico, 2020|
|Authors||Jason D Payne, Andrew P Teeple|
|Product Type||Data Release|
|Record Source||USGS Digital Object Identifier Catalog|
|USGS Organization||Oklahoma-Texas Water Science Center|
Mapping the altitude of the top of the Dockum Group and paleochannel analysis using surface geophysical methods on and near Cannon Air Force Base in Curry County, New Mexico, 2020
Mapping the altitude of the top of the Dockum Group and paleochannel analysis using surface geophysical methods on and near Cannon Air Force Base in Curry County, New Mexico, 2020The hydrogeology on and near Cannon Air Force Base (AFB) in eastern New Mexico was assessed to gain a better understanding of preferential groundwater flow paths through paleochannels. In and near the study area, paleochannels incised the top surface of the Dockum Group (Chinle Formation) and were subsequently filled in with electrically resistive coarse-grained sediments of the overlying OgallalaAuthorsJason D. Payne, Andrew P. Teeple, Jeremy McDowell, David Wallace, Walker A. Hancock