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Publications in Armstrong

Title Publication Year Sort ascending Abstract Author Series Publisher
Playas and recharge of the Ogallala aquifer on the southern High Plains of Texas -- an examination using numerical techniques Playas and recharge of the Ogallala aquifer on the southern High Plains of Texas -- an examination using numerical techniques 1997

This study used a numerical model to examine the playa-focused recharge theory by comparing it with the spatially uniform approach and with a zonal approach.

Mullican, W.F., Johns, N.D., Fryar, A.E. Report of Investigations Bureau of Economic Geology
Spatial variability in unsaturated flow beneath playa and adjacent interplaya settings and implications for contaminant transport, southern High Plains, Texas Spatial variability in unsaturated flow beneath playa and adjacent interplaya settings and implications for contaminant transport, southern High Plains, Texas 1997

Analysis of spatial variability in unsaturated flow is critical to evaluating contaminant transport in areas of focused or preferential flow. This study examined spatial variability at a variety of scales from focused flow through playas to preferential flow in macropores.

Scanlon, B.R., Goldsmith, R.S., Mullican, W.F. Report of Investigations Bureau of Economic Geology
Water-level controls on halite sedimentation:  Permian cyclic evaporites of the Palo Duro basin Water-level controls on halite sedimentation: Permian cyclic evaporites of the Palo Duro basin 1994

Extensively cored cyclic evaporites of the San Andres Formation (Guadalupian) of the Palo Duro Basin, Texas Panhandle, provided fundamental information for interpreting evaporite depositional processes.

Hovorka, S.D. Report of Investigations Bureau of Economic Geology
Geologic Significance of Remotely Sensed Physiographic Features of the Texas Panhandle and Adjacent Regions Geologic Significance of Remotely Sensed Physiographic Features of the Texas Panhandle and Adjacent Regions 1990

Remotely sensed features such as linear drainages, escarpments, ridges, and aligned playas have been identified on Landsat imagery (scale 1:250,000) of the Texas Panhandle and adjacent regions to allow comparison of these features with detailed regional and site-specific geologic data.

Collins, E.W. Geological Circular Bureau of Economic Geology
Tertiary and Quaternary stratigraphy and vertebrate paleontology of parts of northwestern Texas and eastern New Mexico Tertiary and Quaternary stratigraphy and vertebrate paleontology of parts of northwestern Texas and eastern New Mexico 1990

This field guide summarizes recent interpretations of the upper Cenozoic stratigraphy of parts of the Southern High Plains and Rolling Plains in northwestern Texas and eastern New Mexico.

Gustavson, T.C., Holliday, V.T., Osterkamp, W.R., Schultz, G.E., Winkler, D.A. Guidebook Bureau of Economic Geology
Lithogenetic stratigraphy of the Triassic Dockum Formation, Palo Duro basin, Texas Lithogenetic stratigraphy of the Triassic Dockum Formation, Palo Duro basin, Texas 1989

Four clastic depositional sequences compose the lower part of the Triassic Dockum Formation in the Palo Duro Basin.

Johns, D.A. Report of Investigations Bureau of Economic Geology
Tectonic structures of the Palo Duro basin, Texas panhandle Tectonic structures of the Palo Duro basin, Texas panhandle 1989

The Palo Duro Basin is a broad structural low in the southern Texas Panhandle that formed as a result of nearly continuous Pennsylvanian and Permian subsidence. True complexity of this basin is unknown because of the sparsity of structural information.

Budnik, R.T. Report of Investigations Bureau of Economic Geology
Geomorphic processes and rates of retreat affecting the Caprock Escarpment, Texas panhandle Geomorphic processes and rates of retreat affecting the Caprock Escarpment, Texas panhandle 1988

The interaction of geomorphic and ground-water processes has produced the Caprock Escarpmentthat bounds the eastern margin of the Southern High Plains in the Texas Panhandle.

Gustavson, T.C., Simpkins, W.W. Report of Investigations Bureau of Economic Geology
Stratigraphy and influence of effective porosity on ground-water flow in the Wolfcamp brine aquifer, Palo Duro basin, Texas panhandle Stratigraphy and influence of effective porosity on ground-water flow in the Wolfcamp brine aquifer, Palo Duro basin, Texas panhandle 1988

In the Palo Duro Basin, the Wolfcampian Series (lower Permian) overlies Pennsylvanian (primarily Virgilian) strata and underlies the Wichita Group (Leonardian).

Conti, R.D., Herron, M.J., Senger, R.K., Wirojanagud, Prakob Report of Investigations Bureau of Economic Geology
Hydrogeology and hydrochemistry of the Ogallala aquifer, southern High Plains, Texas panhandle and eastern New Mexico Hydrogeology and hydrochemistry of the Ogallala aquifer, southern High Plains, Texas panhandle and eastern New Mexico 1988

The Ogallala aquifer, which underlies the Southern High Plains, consists of the saturated sediments of the Neogene Ogallala Formation. The aquifer is the main source of water for the High Plains of Texas and New Mexico and is being severely depleted by extensive pumpage for irrigation.

Nativ, Ronit Report of Investigations Bureau of Economic Geology