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Articles 1 - 19 of 19
Full-Text Articles in Physical Sciences and Mathematics
Early Cementation Of The Short Creek Oolite Member, Boone Formation (Osagean, Lower Mississippian), Northern Arkansas, K. A. Jayne, A. K. Chandler, W. L. Manger
Early Cementation Of The Short Creek Oolite Member, Boone Formation (Osagean, Lower Mississippian), Northern Arkansas, K. A. Jayne, A. K. Chandler, W. L. Manger
Journal of the Arkansas Academy of Science
The Short Creek Oolite is the only formally named member of the Boone Formation in northern Arkansas. It lacks bedding features, and oolith concentrations that would suggest a shoal environment, and it occurs at variable stratigraphic horizons within the upper Boone Formation consistent with episodic deposition as grainflow slurries. As with modern oolite examples, such as Joulters Cays, Bahamas, the Short Creek preserves numerous intraclasts, and at least one large olistolith indicating an early cementation history.
Sedimentation In The Upper Reaches Of Lake Ouachita, J. A. Patton
Sedimentation In The Upper Reaches Of Lake Ouachita, J. A. Patton
Journal of the Arkansas Academy of Science
Lake Ouachita in west-central Arkansas is the largest man-made reservoir in the state. The lake was created by the U.S. Army Corps of Engineers (USACE) in 1953 for the purposes of hydropower, flood control, and recreation. Although Lake Ouachita is widely known for its high water clarity near Blakely Dam, little is known about the volume and ultimate fate of sediments that enter the lake from two primary tributaries: the North and South Forks of the Ouachita River. This project utilized a dual-frequency echo sounding system in combination with geographic information system and statistical analysis to calculate an average post-impoundment …
Impact Of Black Shale Weathering On Sediment Quality, G. M. Ogendi, R. E. Hannigan, Jerry L. Farris, D. Smith
Impact Of Black Shale Weathering On Sediment Quality, G. M. Ogendi, R. E. Hannigan, Jerry L. Farris, D. Smith
Journal of the Arkansas Academy of Science
Weathering of black shales leads to elevated metal concentrations in both surface water and stream sediments. In spite of the recent focus on black shales, few data exist on the ecological impacts of this process particularly on aquatic organisms. The key objective of this study was to determine the impact of trace metal concentrations in sediments upon aquatic organisms. To achieve the above objective, stream sediment samples were collected from streams draining black shale and limestone (used as a reference stream) lithologies located in central Arkansas between June 2003 and January 2004. Trace metal concentrations were measured by the dynamic …
Geologic Hazards Associated With Shale Strata And Swelling Clays Within Fayetteville Quadrangle, Washington County, Arkansas, Maria E. King, Jack T. King, Stephen K. Boss
Geologic Hazards Associated With Shale Strata And Swelling Clays Within Fayetteville Quadrangle, Washington County, Arkansas, Maria E. King, Jack T. King, Stephen K. Boss
Journal of the Arkansas Academy of Science
No abstract provided.
Reference Sediment Selection In The Lower Mississippi Delta, M. T. Moore, C. D. Milam, Jerry L. Farris
Reference Sediment Selection In The Lower Mississippi Delta, M. T. Moore, C. D. Milam, Jerry L. Farris
Journal of the Arkansas Academy of Science
Floodplain deposition has been a critical part in the evolution of Arkansas' Delta ecoregion, and because ofits high potential for such events, this region is highly enriched and extremely fertile. Historically, water quality in the area has been the subject ofscientific study, and as a result littlehas been published on the effects of underlying sediment with associated benthic communities. Sediment analysis is critical to many of the ongoing aquatic studies because ofits significance as both a habitat for benthic organisms and a sink for contaminants. Seven rivers and one creek within the Delta ecoregion were examined for water chemistry, sediment …
Textural And Lithologic Differences Of Cretaceous, Tertiary, And Quaternary Gravels Of South Arkansas, Lesli Wood
Textural And Lithologic Differences Of Cretaceous, Tertiary, And Quaternary Gravels Of South Arkansas, Lesli Wood
Journal of the Arkansas Academy of Science
Stream gravels have been derived from the Ouachita Mountains since at least Cretaceous times. Past studies have assigned ages to gravel deposits in the basins of the Saline and Little Missouri Rivers on the basis of altitude above local floodplains. This study examines the lithologies and textures of seven gravel outcrops ranging in age from Cretaceous to Quaternary to determine whether any patterns of variation based on assigned ages, variable sources, or precise depositional setting can be discerned. No variation patterns could be found for size distributions of sand-sized and larger fractions. However, the amount of silt-clay matrix decreases through …
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 …
Regional Carbonate Deposition Of The Pitkin Limestone (Chesterian): Washington And Crawford Counties, Arkansas, Robert E. Tehan
Regional Carbonate Deposition Of The Pitkin Limestone (Chesterian): Washington And Crawford Counties, Arkansas, Robert E. Tehan
Journal of the Arkansas Academy of Science
The Pitkin Limestone overlies black shale of the Fayetteville Formation and is the youngest Mississippian unit in the Paleozoic succession of northwest Arkansas. Five major fades have been delineated within the formation by apetrographic examination of samples collected from 17 measured sections: (1) oolith facies, (2) bioclast facies, (3) nodular limestone-shale facies, (4) mudstone facies, and (5) lime mud mound facies. The distribution of these facies in the Pitkin Formation suggests that Fayetteville terrigenous sedimentation was succeeded by the deposition of widespread oolith shoals and skeletal blanket sand bodies across the northern Arkansas structural platform. Sparse accumulations of lime mud …
Algal-Bryozoan Carbonate Buildups Within The Pitkin Limestone (Mississippian-Chesterian), Northwest Arkansas, Alex T. Warmath
Algal-Bryozoan Carbonate Buildups Within The Pitkin Limestone (Mississippian-Chesterian), Northwest Arkansas, Alex T. Warmath
Journal of the Arkansas Academy of Science
More than 14 biohermal buildups have been recognized within the Pitkin Limestone (Mississippian-Chesterian) in eastern Washington and western Madison Counties, northwest Arkansas. These buildups resemble previously described algal mounds in upper Pennsylvanian strata of the Midcontinent region, but differ in their faunal and floral constituents. The mounds are composed of calcilutite with variable amounts of spar and fossil allochemical grains. Associated flanking facies consist of mixed biosparite near the core, grading outward into oosparite. A few zones of shaly, poorly washed biomicrite containing rounded clasts bearing Archimedes fragments are interbedded with the flanking mixed biosparite facies. These clasts appear to …
Relationship Of Lead Mineralization And Bottom Sediment Composition Of Streams, Ponca-Boxley District, Arkansas, William S. Bowen, Kenneth F. Steele
Relationship Of Lead Mineralization And Bottom Sediment Composition Of Streams, Ponca-Boxley District, Arkansas, William S. Bowen, Kenneth F. Steele
Journal of the Arkansas Academy of Science
Samples from tributaries draining known mineralized areas contain considerably more lead than those from the main stream. The unique sediments (i.e. lead rich) from the tributaries are quickly diluted in the main stream to background levels. The lead content of the sediments from the tributaries apparently is controlled by the presence of lead-rich clasts. Sorption of lead by iron oxide coating grains is more significant in the main stream because the unique clasts are diluted. The mineralization also increases zinc and cadmium levels in the sediments. The concentration of calcium is controlled largely by the presence of limestone, whereas the …
Stratigraphy And Sedimentary Structures Of A Middle Bloyd Fluvial Sandstone, Washington And Madison Counties, Arkansas, John M. Glenn
Stratigraphy And Sedimentary Structures Of A Middle Bloyd Fluvial Sandstone, Washington And Madison Counties, Arkansas, John M. Glenn
Journal of the Arkansas Academy of Science
A prominent quartz-pebble-bearing sandstone unit crops out at stream level along the East Fork of the White River in Madison County. Detailed geologic mapping indicates that the unit is stratigraphically positioned between the Brentwood and Dye Shale Members of the Bloyd Formation and is not the Greenland Member of the Winslow Fromation as previously supposed. Sedimentary textures and structures of the unit indicate that it was deposited by competent, unidirectional currents flowing in a southerly direction. These currents were related to a broad braided stream system.
Middle Archaic Complex Of Northwest Arkansas, Michael A. Beckman
Middle Archaic Complex Of Northwest Arkansas, Michael A. Beckman
Journal of the Arkansas Academy of Science
No abstract provided.
Paleozoic Analogues Of Recent Carbonates, Tom Freeman
Paleozoic Analogues Of Recent Carbonates, Tom Freeman
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.
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.
Geological Implications Of Soil Mechanics, James Harrison Quinn
Geological Implications Of Soil Mechanics, James Harrison Quinn
Journal of the Arkansas Academy of Science
No abstract provided.
Geologic Section Of Bradley, Calhoun, Ouachita, And Part Of Nevada Counties, Arkansas, Donald R. Albin
Geologic Section Of Bradley, Calhoun, Ouachita, And Part Of Nevada Counties, Arkansas, Donald R. Albin
Journal of the Arkansas Academy of Science
A series of 23 test holes has been drilled across Bradley, Calhoun, Ouachita, and part of Nevada Counties in southcentral Arkansas to determine the geology of the shallow water-bearing deposits of Tertiary and Quaternary age . The correlation of the lithologic and electric logs of the test holes and available electric and drillers' logs of oil-test wells indicates that: (1) the transition zone in the upper part of the Midway group may be about 85 feet thick in Nevada and Ouachita Counties; (2) the contact between the Wilcox and Claiborne groups is about 12 miles northwest of the location shown …
Geology Of A Portion Of Prairie Township, Washington County, Arkansas, Kern C. Jackson, Ross H. Pohlo
Geology Of A Portion Of Prairie Township, Washington County, Arkansas, Kern C. Jackson, Ross H. Pohlo
Journal of the Arkansas Academy of Science
No abstract provided.
Brentwood Limestone Of Madison County, Arkansas, Vance O. Cook
Brentwood Limestone Of Madison County, Arkansas, Vance O. Cook
Journal of the Arkansas Academy of Science
No abstract provided.