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Articles 211 - 240 of 250
Full-Text Articles in Geology
Stratigraphy Of A Pennsylvanian Deltaic Sequence In Russellville, Arkansas, Christopher F. Moyer, Ken Fritsche
Stratigraphy Of A Pennsylvanian Deltaic Sequence In Russellville, Arkansas, Christopher F. Moyer, Ken Fritsche
Journal of the Arkansas Academy of Science
No abstract provided.
Reconnaissance Of Ground-Water Resources Of Stone And Independence Counties, Arkansas, Albert E. Ogden, James R. Musgrove, Lisa Milligan
Reconnaissance Of Ground-Water Resources Of Stone And Independence Counties, Arkansas, Albert E. Ogden, James R. Musgrove, Lisa Milligan
Journal of the Arkansas Academy of Science
No abstract provided.
Geology For The Layman, James O. Staggs
Geology For The Layman, James O. Staggs
Annual of the Arkansas Natural Resources Law Institute
The first thing that an individual must thoroughly understand, is that geology is not an exact science. This may be strange for a geologist to say, but it is very similar to the profession of law in that any set of data may be and is usually interpreted differently by individual lawyers. We geologist start with some known facts (sometime geological), make assumptions, and then intrepret into the unknown. It is this interpretation that separates a successful geologist from a geologist. A successful oil finding geologist is a geologist that has developed this interpretation of geological facts into an art. …
Distribution Of Fenitized Crustal Xenoliths In Carbonatite Intrusions, West-Central Arkansas, John Sharp
Distribution Of Fenitized Crustal Xenoliths In Carbonatite Intrusions, West-Central Arkansas, John Sharp
Journal of the Arkansas Academy of Science
Crustal xenoliths from carbonatite intrusions in the Morrilton-Perryville Arkansas area display a variety of mineralogical and textural features that suggest that they are fragments of basement crystalline rock that has undergone sodic metasomatism resulting from their close proximity at depth to a carbonatite complex. With increasing degrees of fenitization, the leucocratic xenoliths range from granolite - syenite - analcite syenite, while the melanocratic xenoliths range from hornblende - biotite to aegerine-apatite. A definite increase in fenitization is observed from Morrilton in the north to Brazil Branch, 16.8 km to the south. Fenitized xenoliths from Brazil Branch are generally quite small …
Effects Of Changes In Surface Water Regime And/Or Land Use On The Vertical Distribution Of Water Available For Wetland Vegetation: Dynamic Model Of The Zone Of Aeration (Part 1 Of Completion Report For Project A-023-Ark), Robert N. Maccallum, R. A. Sims
Effects Of Changes In Surface Water Regime And/Or Land Use On The Vertical Distribution Of Water Available For Wetland Vegetation: Dynamic Model Of The Zone Of Aeration (Part 1 Of Completion Report For Project A-023-Ark), Robert N. Maccallum, R. A. Sims
Arkansas Water Resources Center Technical Reports
A mathematical model by Green, simulating one-dimensional vertical ground-water movement in unsaturated soils of the prairie region of Kansas, has been adapted for use in a wetlands environment typified by the wetlands forest of Eastern Arkansas. The model consists of two second-order, non-linear, partial differential equations and an algorithm for their numerical solution. The original model was extended to include functions for seasonal changes in transpiration and for drainage of excess precipitation. Before the addition of the two functions, the model reliability was limited to one growth season.
Chemistry Of The Spring Waters Of The Ouachita Mountains Excluding Hot Springs, Arkansas, George H. Wagner, Kenneth F. Steele
Chemistry Of The Spring Waters Of The Ouachita Mountains Excluding Hot Springs, Arkansas, George H. Wagner, Kenneth F. Steele
Arkansas Water Resources Center Technical Reports
This report is based on the chemical analysis of the waters from 93 springs and 9 wells. Springs, when free from metal plumbing, provide an uncontaminated source of the ground water and it was desired to obtain water uncontaminated with metals. A few wells were added to the list, usually because of their unique location in the sampling grid.
Contamination Of Boone-St. Joe Limestone Groundwater By Septic Tanks And Chicken Houses, Gerald D. Cox, Albert E. Ogden, Gretta Slavik
Contamination Of Boone-St. Joe Limestone Groundwater By Septic Tanks And Chicken Houses, Gerald D. Cox, Albert E. Ogden, Gretta Slavik
Journal of the Arkansas Academy of Science
Eighty-one water samples were collected from wells in the Boone-St. Joe limestone aquifer of northwest Arkansas and analyzed for fecal coliform, fecal streptococcus, total coliform bacteria, chloride, phosphate, nitrate and sulfate to determine the degree of contamination. Forty-nine percent of the samples had fecal streptococcus counts greater than 1 colony per 100 ml, 68% had total coliform counts of 1 or more colonies per 100 ml, and 9% of the wells had fecal coliform counts of 1 or more colonies per 100 ml. Water from wells in Clarksville, Nixa, Noark, Tonti and Waben cherty silt loam soils showed from 83 …
Stratigraphic Relationships Of The Brentwood And Woolsey Members, Bloyd Formation (Type Morrowan), Northwest Arkansas, Thomas A. Mcgilvery, Charles E. Berlau
Stratigraphic Relationships Of The Brentwood And Woolsey Members, Bloyd Formation (Type Morrowan), Northwest Arkansas, Thomas A. Mcgilvery, Charles E. Berlau
Journal of the Arkansas Academy of Science
The Brentwood Member of the Bloyd Formation conformably overlies the Prairie Grove Member, Hale Formation in the type Morrowan succession of northwestern Arkansas. At its type locality, the Brentwood is separated from the underlying Prairie Grove Member by nearly 6 m of dark shale. Away from this area, the shale thins rapidly and the Hale-Bloyd boundary may be placed with difficulty. At some localities east of type section, the boundary is thought to be erosional rather than the more typical gradational contact. The Brentwood consists of discrete carbonate bodies separated by dark shales. The carbonates consist principally of open shelf …
Mercury Content Of Waters In The Midcontinent Region, Larry Barber Ii, Kenneth F. Steele
Mercury Content Of Waters In The Midcontinent Region, Larry Barber Ii, Kenneth F. Steele
Journal of the Arkansas Academy of Science
Two major areas of the midcontinent region were investigated for their aqueous mercury concentrations. Sixteen surface water and 17 ground water samples were collected in an eleven county area of N.W. Arkansas, S.W. Missouri and N.E. Oklahoma (Ozark area) and analyzed for total dissolved mercury by the flameless atomic absorption spectrophotometric method. The range (<0.2 to 0.8 ppb), the mean (0.4 ppb) and the median (0.4 ppb) are the same for both ground water and surface water. Values obtained for the Ozark area are slightly greater than those reported for surface water by others (about 0.1 ppb), but are well within the range reported for surface waters (0.1 to 17.0 ppb). The range for 102 ground water samples from the Ouachita Mountain area is <0.1 to 2.3 ppb, the mean 0.3 ppb and the median 0.1 ppb. Thus, the mercury values for this area are similar to those of the Ozark area except fora higher upper range. The mercury mineralization (cinnabar) in the southern part of the Ouachita Mountain area, in part, is the cause of the higher values. Only two samples (2.1 and 2.3 ppb), both from the Ouachita Mountain area, exceed the EPA drinking water limits of 2 ppb mercury in the western Arkansas region.
Preliminary Investigation Of The Ground-Water Resources Of Northern Searcy County, Arkansas, Wyndal M. Goodman, Albert E. Ogden
Preliminary Investigation Of The Ground-Water Resources Of Northern Searcy County, Arkansas, Wyndal M. Goodman, Albert E. Ogden
Journal of the Arkansas Academy of Science
Two aquifers are extensively used by residents of small communities and rural areas in northern Searcy County, Arkansas. The Mississippian Boone-St. Joe aquifer is generally the less productive and the shallower of the two. Ground-water yields for the Boone-St. Joe range from 0.5 to 75 gpm with a median yield of 5 and a mean of 9.8 gpm. Well depths range from 100 to 754 feet with a median depth of 350 feet and a mean of 360 feet. Confined conditions are indicated by the greater depths, whereas the Boone-St. Joe aquifer is unconfined when exposed at the surface. Underlying …
Preliminary Investigation Of The Ground-Water Resources Of Baxter, Fulton, Izard And Sharp Counties, Arkansas, Mike Liebelt, Gerald Lundy, Albert E. Ogden
Preliminary Investigation Of The Ground-Water Resources Of Baxter, Fulton, Izard And Sharp Counties, Arkansas, Mike Liebelt, Gerald Lundy, Albert E. Ogden
Journal of the Arkansas Academy of Science
One hundred and seventy-seven drillers' well reports were used to investigate the groundwater resources of Baxter, Fulton, Izard, and Sharp counties. The most widely utilized aquifer zone is composed of the Cotter and Jefferson City dolomites. The well depths range from 30 to 740 ft. with a mean and median of 264 and 225 ft., respectively. The drillers' yield estimates range from 1 to 50 gpm with a mean of 12.0 gpm and a median of 10 gpm. The piezometric surface has an average hydraulic gradient of 9 ft./mile with groundwater discharge occurring along the Spring and White Rivers. Overlying …
Preliminary Investigation Of Rural-Use Aquifers Of Boone, Carroll, And Madison Counties, Arkansas, Albert E. Ogden, Nancy L. Taylor, Steve D. Thompson
Preliminary Investigation Of Rural-Use Aquifers Of Boone, Carroll, And Madison Counties, Arkansas, Albert E. Ogden, Nancy L. Taylor, Steve D. Thompson
Journal of the Arkansas Academy of Science
Approximately 500 water wells having driller's lithologic logs were plottedin Boone, Carroll, and Madison Counties, Arkansas. Three aquifers were found to be used by the rural residents and smaller communities. The most shallow of these is the Mississippian Boone-St. Joe aquifer. This aquifer is generally the least productive having a range of .25 to 60 gpm but a median productivity of only 5 gpm. Well depths for the Boone-St. Joe range from 46 to 464 ft. and have a median depth of 225 ft. The Boone-St. Joe aquifer is unconfined to semi-confined and yields sufficient quantities of water only when …
Lithostratigraphy Of The Cane Hill Member Of The Hale Formation (Type Morrowan), Northwest Arkansas, Robert T. Liner
Lithostratigraphy Of The Cane Hill Member Of The Hale Formation (Type Morrowan), Northwest Arkansas, Robert T. Liner
Journal of the Arkansas Academy of Science
The Hale Formation (lower Morrowan Series) is a sequence of sandstones and shales divided into the Cane Hill(lower) and Prairie Grove Members. In Washington County, Arkansas, the type Cane Hill consists predominantly of interbedded fine-grained, noncalcareous sandstones and silty shales often with a pebble conglomerate at its base. The member rests unconformably on Chesterian Strata of either the Pitkin Formation or underlying Fayetteville Formation, and it is unconformably overlain by the Prairie Grove Member. In Washington County, the Cane Hill exhibits a slight thickening trend to the south and east. Interpretation of sedimentary structures indicates that the Cane Hill was …
Hydrogeologic Investigation Of A Landfill Site In Washington County, Arkansas, Albert E. Ogden, Carlos J. Quintana
Hydrogeologic Investigation Of A Landfill Site In Washington County, Arkansas, Albert E. Ogden, Carlos J. Quintana
Journal of the Arkansas Academy of Science
A proposed landfill site near Wheeler, Washington Co., Arkansas, was investigated for its hydrogeologic suitability. The site is located on the highly fractured, cavernous, and cherty Boone Ls. The site is a small upland valley 4500 ft. north of Clear Creek. The valley containing the proposed site is a karst dry valley in which precipitation rapidly infiltrates, recharging the water table and local springs. The water table around the site was mapped to determine the hydraulic gradient and direction of ground-water movement. The water table slopes in a SE direction from the landfill towards Clear Creek with a steep hydraulic …
Structural Geology Of The Brentwood-St. Paul Area, Northwest Arkansas, Mikel R. Shinn
Structural Geology Of The Brentwood-St. Paul Area, Northwest Arkansas, Mikel R. Shinn
Journal of the Arkansas Academy of Science
Photogeologic and field mapping of a 530 mi² area in southeastern Washington and southern Madison Counties, Arkansas, indicates that post-Atoka structural deformation occurred primarily through differential uplift of basement fault blocks. Northeast and east trending basement faults and fracture systems are present. Northeast trending features are related to the major fracture systems of the stable continental interior. They were initiated by shearing during Pre-Cambrian time and have subsequently acted as crustal zones of weakness along which mostly vertical movement has occurred. East trending basement faults may have originally developed as a result of tension between the stable Ozark uplift and …
Geometry And Depositional Systems Of The Orr And Patterson Sands, Bloyd Formation (Pennsylvanian), Eastern Franklin And Western Johnson Counties, Arkansas, Michael E. Corbin
Geometry And Depositional Systems Of The Orr And Patterson Sands, Bloyd Formation (Pennsylvanian), Eastern Franklin And Western Johnson Counties, Arkansas, Michael E. Corbin
Journal of the Arkansas Academy of Science
The Orr and Patterson sandstones occur in the Trace Creek Shale Member, Bloyd Formation, in surface exposures on the northern Arkansas structural platform. The Orr sandstone exhibits regional thickening trends to the south and southeast into the Arkoma Basin as shown by isolith maps for the area studied. The depositional environment that formed this sandstone comprised fluvial or deltaic channels feeding a destructive delta system to the southeast. The Patterson sandstone lies stratigraphically above the Orr sandstone, and is confined essentially to Franklin and Johnson counties. It is poorly developed or not present in Washington and western Crawford Counties. The …
Depositional Systems Of The Sells And Cecil Sandstones, Atoka Formation (Pennsylvanian), Eastern Crawford And Western Franklin Counties, Arkansas, Chris A. Cardneaux
Depositional Systems Of The Sells And Cecil Sandstones, Atoka Formation (Pennsylvanian), Eastern Crawford And Western Franklin Counties, Arkansas, Chris A. Cardneaux
Journal of the Arkansas Academy of Science
The Cecil and Sells sandstones of the Atoka Formation (Pennsylvanian) were studied in the subsurface of eastern Crawford and western Franklin Counties. Sand of the Cecil sandstone was delivered to a high destructive, wave dominated delta southeast of Fort Smith and reworked laterally by longshore currents to form coastal barrier sands to the east. The Sells sandstone unit accumulated as a distributary channel system that bifurcates to the southeast and southwest. The interdistributary areas are characterized by immature sands interbedded with shales. These immature sands were deposited by crevasse splays and reworking of the distributary mouth bars by marine processes …
Mare Basalt Thickness In Sinus Aestuum And Sinus Medii, J. B. Sharp, N. Gilbert, R. A. De Hon
Mare Basalt Thickness In Sinus Aestuum And Sinus Medii, J. B. Sharp, N. Gilbert, R. A. De Hon
Journal of the Arkansas Academy of Science
No abstract provided.
Remnant Prairie Plots Of Benton County, Arkansas, Maxine B. Clark
Remnant Prairie Plots Of Benton County, Arkansas, Maxine B. Clark
Journal of the Arkansas Academy of Science
No abstract provided.
Chemical Composition Of Carbonatites In Conway And Perry Counties Of Arkansas, George H. Wagner, Kenneth F. Steele
Chemical Composition Of Carbonatites In Conway And Perry Counties Of Arkansas, George H. Wagner, Kenneth F. Steele
Journal of the Arkansas Academy of Science
No abstract provided.
1974 Nonflood-Stage Chemical Loads Of The Buffalo River, Arkansas, Kenneth F. Steele, George H. Wagner
1974 Nonflood-Stage Chemical Loads Of The Buffalo River, Arkansas, Kenneth F. Steele, George H. Wagner
Journal of the Arkansas Academy of Science
Dissolved Ca, Mg, Na, K, Fe, Mn, and Zn loads of the Buffalo River generally show trends along the river attributable to changes in geology and vary with the season because of concentration by evapotranspiration and dilution by rain. Suspended material element loads show neither seasonal trends nor trends along the river. The Fe load for the river is predominantly in the suspended material, the Mn load is divided approximately evenly between dissolved and suspended material, and Ca, Mg, Na, K, and Zn are predominantly in the dissolved load.
Limnology Of Four Bauxite Open-Pit Lakes, George L. Harp, Ronald D. Hubbard
Limnology Of Four Bauxite Open-Pit Lakes, George L. Harp, Ronald D. Hubbard
Journal of the Arkansas Academy of Science
The aquatic flora and fauna and 18 physicochemical characteristics of four bauxite open-pit lakes were studied from September 1969 to August 1970. The least acid lake (pH 3.4-4.4) supported 49 different aquatic insects, plankton, and higher aquatic plants. The most acid lake (pH 2.7-3.2) supported only 26 different plants and animals. Bauxite open-pit lakes within the pH range studied appear to be as relatively unproductive as their coal strip-mine lake counterparts, with which they share physicochemical and biological characteristics. Benthic macrofaunal diversity and abundance appear to be related more closely to distribution and abundance of leaf detritus than to hydrogen-ion …
Eddy Bluff Shelter Of Beaver Reservoir Of Northwest Arkansas, James D. Morrison
Eddy Bluff Shelter Of Beaver Reservoir Of Northwest Arkansas, James D. Morrison
Journal of the Arkansas Academy of Science
No abstract provided.
Monadnocks, Divides And Ozark Physiography, James Harrison Quinn
Monadnocks, Divides And Ozark Physiography, James Harrison Quinn
Journal of the Arkansas Academy of Science
No abstract provided.
Report On Some Iron And Nickel Minerals From The Soapstone Deposits Of Saline County, Arkansas, Phillip Wicklein, Alden B. Carpenter
Report On Some Iron And Nickel Minerals From The Soapstone Deposits Of Saline County, Arkansas, Phillip Wicklein, Alden B. Carpenter
Journal of the Arkansas Academy of Science
No abstract provided.
Dimension Stone In Arkansas, Charles G. Stone, William J. Crouch
Dimension Stone In Arkansas, Charles G. Stone, William J. Crouch
Journal of the Arkansas Academy of Science
No abstract provided.
New Lentil In Upper Fayetteville Formation, John D. Taylor
New Lentil In Upper Fayetteville Formation, John D. Taylor
Journal of the Arkansas Academy of Science
No abstract provided.
Relationship Of Igneous Activity To Mineral Deposits In Arkansas, Charles G. Stone, Philip J. Sterling
Relationship Of Igneous Activity To Mineral Deposits In Arkansas, Charles G. Stone, Philip J. Sterling
Journal of the Arkansas Academy of Science
No abstract provided.
Hypogene Clay And Mica Minerals Associated With Fault Zones In The Ouachita Mountains-Arkoma Basin Area, Arkansas, Charles G. Stone
Hypogene Clay And Mica Minerals Associated With Fault Zones In The Ouachita Mountains-Arkoma Basin Area, Arkansas, Charles G. Stone
Journal of the Arkansas Academy of Science
No abstract provided.
Geology Along A Portion Of Highway 23, Madison County, Arkansas, J. A. Mcentire Iii
Geology Along A Portion Of Highway 23, Madison County, Arkansas, J. A. Mcentire Iii
Journal of the Arkansas Academy of Science
No abstract provided.