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Articles 57001 - 57030 of 59364
Full-Text Articles in Entire DC Network
Total Number Of Irrigation Wells Located In Nebraska Counties As Of 1973
Total Number Of Irrigation Wells Located In Nebraska Counties As Of 1973
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
Glacial Deposits, Vol. 1, 1972-1973, Department Of Geography-Geology
Glacial Deposits, Vol. 1, 1972-1973, Department Of Geography-Geology
Glacial Deposits
Newsletter of the Department of Geography-Geology
Heavy Minerals Of Glacial Sediments In The Area Of Red Lake Falls, Minnesota, Howard Hobbs
Heavy Minerals Of Glacial Sediments In The Area Of Red Lake Falls, Minnesota, Howard Hobbs
Theses and Dissertations
Pleistocene lithostratigraphic units containing glacial sediments in the Red Lake Falls, Minnesota, area and adjacent areas were studied to determine their heavy-mineral assemolages. Seventy-two samples of fine sand were studied by optical grain-count methods and 77 samples of fine sand were studied by x-ray diffraction methods. Most formations contain a hornblende-garnet-pyroxene-epidote assemblage; the Gervais Formation contains a pyroxene-hornblende assemblage. The mean proportion of the constituent minerals is different in each formation; however, there is overlap in the ranges of heavy mineral proportions among the formations. The Red Lake Falls Formation can be subdivided on the basis of garnet abundance.
Depositional Environments Of The Upper Part Of The Sentinel Butte Formation, Southeastern Mckenzie County, North Dakota, Robert Post Johnson
Depositional Environments Of The Upper Part Of The Sentinel Butte Formation, Southeastern Mckenzie County, North Dakota, Robert Post Johnson
Theses and Dissertations
The depositional environments of a 40 meter thick interval in the upper part of the Sentinel Butte Formation in southeastern McKenzie County, North Dakota have been determined from the sedimentary structures, geometry, distribution of grain· sizes, and stratigraphic relations of cyclic lithostratigraphic units. The top of the study interval is the top of the upper yellow marker bed.
An elongate, tabular sand bed was studied in detail. It is 12 meters thick and 3 kilometers wide and it is interpreted to have been deposited by lateral accretion in a high-sinuosity stream. Paleo current indicators are parallel to the long axis …
Quaternary Stratigraphy Of The Lake Sakakawea Area, Mclean County, North Dakota, James H. Ulmer
Quaternary Stratigraphy Of The Lake Sakakawea Area, Mclean County, North Dakota, James H. Ulmer
Theses and Dissertations
The Quaternary stratigraphy of central North Dakota is best exposed along the nearly continuous, 20-meter-high, vertical bluffs of Lake Sakakawea in the Missouri River trench. The following lithostratigraphic units (in ascending order) are exposed just north of Riverdale, North Dakota, and can be correlated for tens of kilometers along the bluffs: (1) Sentinel Butte Formation (lignite-bearing sediment of Paleocene age), (2) lower Medicine Hill Formation (fluvial sand and gravel), (3) upper Medicine Hill Formation (massive pebble loam with silt and gravel inclusions> glacial sediment), (4) lower Horseshoe Valley Formation (fluvial sand and gravel), (5) upper Horseshoe Valley Formation (jointed pebble-loam, …
Heavy Metals In The Main Streams Of The James River Basin, Missouri, Richard Jerome Lance
Heavy Metals In The Main Streams Of The James River Basin, Missouri, Richard Jerome Lance
Masters Theses
"Demands on water resources in the James River basin have greatly increased. Industrial plants and lead-zinc prospects in the basin are potential sources of heavy metal additions to the waters of the area. The study determines the heavy metal content and distribution in the streams of the basin.
Approximately 50 water samples were collected each season and analyzed by atomic absorption techniques. Field determinations of temperature, specific conductance, pH, and effective alkalinity were also made.
Ranges of heavy metal content were: (1) mercury- <0. 1 to 0.3 ppb (summer only); (2) zinc-
The urban areas of Springfield contribute dissolved heavy metals to the surface streams. The Southwest Springfield Sewage …
0.>Paleozoic Stratigraphy As An Ore Control Of Hydrothermal, Base-Metal, Sulfide Deposits In New Mexico, John Samuel Sullivan Jr.
Paleozoic Stratigraphy As An Ore Control Of Hydrothermal, Base-Metal, Sulfide Deposits In New Mexico, John Samuel Sullivan Jr.
Doctoral Dissertations
"Until now the concept or regional stratigraphic control of hydrothermal ore deposits has not received much attention in the literature as a possible exploration guide for locating additional ore bodies. This concept is applied on a regional scale to Paleozoic strata in thirteen mining districts with hydrothermal base-metal deposits in a 35,300 square mile area or southwest New Mexico.
The rocks at the stratigraphic position of the ore-zones are characterized as massive- to thick-bedded with less than 5 percent chert present. The rocks are abundantly to moderately fractured. Fine- to medium-grained dolomite is the dominant host-rock in the lower Paleozoic …
Soil Structure Changes Under Wheatbelt Farming Systems, T C. Stoneman
Soil Structure Changes Under Wheatbelt Farming Systems, T C. Stoneman
Journal of the Department of Agriculture, Western Australia, Series 4
A review of 14 years of Department of Agriculture research into the effects of wheatbelt fanning practices on soil structure reaches the general conclusion that cultivation and grazing practices influence soil structure, and that structure can be improved by soil amendments and pasture growth.
Little data has been obtained to relate plant growth to improved soil structure, as measured.
1960-1973 Dogwood Circle, Mandarin Garden Club
1960-1973 Dogwood Circle, Mandarin Garden Club
Mandarin Garden Club Scrapbooks
Scrapbook includes leaflets, pamphlets, images and news clippings. Cover material: Cardboard. Size: 11" x 14" x 1.0625".
Multispectral Analysis Of Erts Imagery By Color Enhancement, John F. Peters
Multispectral Analysis Of Erts Imagery By Color Enhancement, John F. Peters
Masters Theses
"The Earth Resources Technology Satellite (ERTS) program has supplied the scientist with high resolution multispectral imagery of a large portion or the earth. Photographic and electronic methods of image enhancement are not universally available to those who might profit from such endeavors.
Diazo products were found to be satisfactory for creation of false color enhancement of ERTS multispectral data. The purpose of the enhancement was to make the Diazochrome composite comparable to more sophisticated methods for the purpose of interpretation. The basis of the enhancement was the standard false color infrared composite, with negative and positive Diazochrome masks to enhance …
A Study Of A New Hydrometallurgical Treatment For New Lead Belt Chalcopyrite Concentrates, Larry Steven Livingston
A Study Of A New Hydrometallurgical Treatment For New Lead Belt Chalcopyrite Concentrates, Larry Steven Livingston
Masters Theses
"A two-phase research project was conducted on chalcopyrite concentrates from the New Lead Belt of Missouri. Phase one includes an ore microscopy study of the Magmont and Viburnum chalcopyrite concentrates in respect to mineralogy, particle size and interlocking characteristics of ore minerals and their possible relationships to poor chalcopyrite-galena separation in the copper flotation circuits.
Results of the ore microscopy study of the Magmont and Viburnum mines chalcopyrite concentrates suggest that interlocking of chalcopyrite and galena are not the cause of poor chalcopyrite-galena separation in the copper flotation circuits.
The most common sulfides found in the Magmont and Viburnum chalcopyrite …
Distribution Of Trace Elements In Host Rock Limestone In The Tri-State Zinc-Lead District, Dinesh Jashbhai Patel
Distribution Of Trace Elements In Host Rock Limestone In The Tri-State Zinc-Lead District, Dinesh Jashbhai Patel
Masters Theses
"The trace metal contents of limestone in the Tri-State zinc-lead district were determined within a single horizon, the M bed. Ninety-six specimens, collected for a previous study of their petrographic character, were analyzed for zinc, lead, and copper using atomic absorption spectrophotometric techniques.
The unaltered M bed limestone at a distance from ore bodies was found to contain only 12-28 ppm zinc, 40-SO ppm lead and 12 ppm or less copper. Those limestone specimens which were found b earlier petrographic study to be altered principally to sparry calcite commonly contain anomalous amounts of zinc and lead. Some also have slightly …
Heavy Metal Concentrations In The Waters Of The Springfield Area, Missouri, Anita Louise Williams
Heavy Metal Concentrations In The Waters Of The Springfield Area, Missouri, Anita Louise Williams
Masters Theses
"Water samples consisting of streams, springs, lakes, deep wells, and shallow wells were collected from various locations around the Springfield area. These were analysed for concentrations of the heavy metals of lead, copper, cadmium, zinc, mercury, and iron. Heavy metal contents in the waters occasionally show local concentrations. The zinc content can be related to known minor mineralized areas around Springfield. Some iron content in the surface waters and shallow aquifers is contributed by the iron-bearing clays and pyrites in the shallow formations.
The ranges of heavy metal values in the Springfield area are in ppb: lead, 1 to 70; …
Heavy Metal Analysis Of Stream Sediments In The James River Basin, Missouri, William J. Head
Heavy Metal Analysis Of Stream Sediments In The James River Basin, Missouri, William J. Head
Masters Theses
"A reconnaissance survey of stream sediments using the minus 80 mesh sieve fraction was made at 53 sites throughout the James River basin, Missouri. Sample sites within the 1460 square miles of the basin were chosen at tributary confluences, suspected contamination sources, and known areas of mineralization. Replicates and stream profiles were taken to check for analytical variation and reproducibility of results. Sediment samples were prepared by a hot nitric acid leach method. The sediments were analyzed using an atomic absorption unit to determine Cu, Pb, Zn, and Cd trace metal contents.
Values of selected streams within the basin were …
Corals Of The St. Louis Limestone In The Area Of Calhoun County, Illinois And St. Louis County, Missouri, William Earl Collins
Corals Of The St. Louis Limestone In The Area Of Calhoun County, Illinois And St. Louis County, Missouri, William Earl Collins
Masters Theses
"The St. Louis Limestone and its equivalent formations crop out from Alaska south to Sonora and from Arizona east to Virginia. The St. Louis, in most cases, is fossiliferous and contains numerous species of foraminifers, echinoderms, bryozoans, molluscans, brachipods, arthropods and coelenterates. Algal mounds and mats are common. The rugose coral fauna of the Middle Mississippian (Meramecian) St. Louis Limestone of southern Calhoun County, Illinois and northern St. Louis County, Missouri was studied to determine first what corals were present and second the validity of the names assigned to the previously described species. It was found that the binomen for …
Structure And Chemical Composition Of The Otoliths Of Cyprinus Carpio, Larry Paul Coen
Structure And Chemical Composition Of The Otoliths Of Cyprinus Carpio, Larry Paul Coen
Masters Theses
"The need for the study of microfossils such as foraminifera, conodonts, and otoliths as stratigraphic tools has been well established. However, disarticulated parts such as otoliths and conodonts cannot be effectively used unless they can be recognized. Otoliths, although somewhat unrecognized in the geological record, are far more abundant than articulated skeletons (Frizzell, 1965, p. 86). Therefore, much investigation is being conducted to reveal the origin, function, morphology, and usefulness of the otoliths of fishes.
In this investigation, the asteriscus, well developed only in Ostariophysins (of which the carp is a member), is studied for morphology. New tentative terms are …
Los Cañones Submarinos, Aldemaro Romero Jr.
Los Cañones Submarinos, Aldemaro Romero Jr.
Publications and Research
No abstract provided.
Seismic Refraction Study Of Post-Pliocene Stratigraphy, Dismal Swamp, Virginia, William Brian Fraser
Seismic Refraction Study Of Post-Pliocene Stratigraphy, Dismal Swamp, Virginia, William Brian Fraser
OES Theses and Dissertations
This study examines Pliocene-Pleistocene lithostratigraphy and the Yorktown unconformity within the Dismal Swamp by means of remote sensing analysis, Wyrobek-Gardner seismic refraction profiling and split-spoon coring. Pre-Sangamon fluvial/tidal channel deposits are not present and the Yorktown unconformity dips irregularly southeastward at 0.35 meters/kilometer (2 feet/mile) from a high at 4 meters above sea level to a low of -1 meter (+12 to -2 ft) below sea level. The marker velocity for the Yorktown Formation is 1600 mps (5250 fps) and regression of seismic depths of the Yorktown Formation with corresponding split-spoon depths yields a high correlation. Short line upper layer …
Depositional Environments Of The Lower Tullock Formation (Paleocene), Slope County, Southwestern North Dakota, William K. Hickey
Depositional Environments Of The Lower Tullock Formation (Paleocene), Slope County, Southwestern North Dakota, William K. Hickey
Theses and Dissertations
The lower Tullock Formation (Paleocene), which consists of a section 5 to 30 feet thick, was studied in Slope County, southwestern North Dakota to determine its depositional environments. The lithol ogies present are sand, silt, clay and lignite. A bed of lignite or yellow silt marks the base of the Tullock Formation throughout the study area.
The silt beds are interpreted as having been deposited as natural levees because they are wedge-shaped and contain climbing ripple cross-stratification, interbedded sand lenses and lignitized paleo-raot systems. Well-drained swamp deposits are difficult to distinguish, but are probably located in the silt beds.
There …
Summary Of 1972 Seasonal Results "Decide" Superphosphate Rates On Pastures, J. W. Bowden
Summary Of 1972 Seasonal Results "Decide" Superphosphate Rates On Pastures, J. W. Bowden
Experimental Summaries - Plant Research
A total of 53 pasture trials were topdressed. Of these, 37 trials were quantitatively assessed at different times during the growing season. Of the 15 wheat trials sown, only four trials gave useful results because of multiple drilling techniques used on most trials. Until the trial results have undergone comprehensive statistical analysis, no conclusions can be drawn. about the levels of response or "optimum" rates of superphosphate application at individual sites. However, because of the very short growing season in 1972 responses were generally poor. It appears that nil superphosphate application would have been optimum for animal production in the …
1973 Rates Of Phosphate On Lupin Yield, G Walton
1973 Rates Of Phosphate On Lupin Yield, G Walton
Experimental Summaries - Plant Research
Comments on Results - New Land sites (Graphs 1, 2) - The three sites were very responsive with the point of inflexion about 600 kg/ha super rate (similar to 1972 result). The seed x super rate interaction shows the quicker response to super with higher seeding rates. Low Super Bank (800 kg/ha) (GRAPH 3) - The two sites showed very little response to super applied. On the Eradu sandplain no response to super for either Unicrop or Wheat. On the Watheroo yellow sandplain (73M015) the two lupin cultivers and the wheat gave different responses. High Super Bank (>1 OOOkg/ha) …
Mineral Nutrient Levels In Lupin Crops Affected By 'Split Seed'., M. W. Perry
Mineral Nutrient Levels In Lupin Crops Affected By 'Split Seed'., M. W. Perry
Experimental Summaries - Plant Research
Table 1. Survey of Nutrient Levels in Whole Seed. Table 2. Nutrient Levels in Tests and Embryo. Table 3. Effect of Sprays. Table 4. Nutrient Levels in Vegetative material. Table 5. Nutrient Level in Vegetative material (Soil type comparisons at paired adjacent sites) - Samples of M.L. Poole.
Progress And Data For Investigation, D Tennant Dr
Progress And Data For Investigation, D Tennant Dr
Experimental Summaries - Plant Research
1. Fallow Re-assessment. 2. Root Penetration and Distribution in Wheat. 3. Moisture use by Lupins, Rape and Wheat. 4. Variety Investigations in respect of Root Growth. 72M9, 73MO41. Locations: Lancelin - 73M041, Wyalkatchem 73N038, Bering Siding - 73N040 (2), Tammin - 73N041, Cunderdin - 73no42, Meckering - 73N043, Bodallin - 73ME26, Walgoolan - 73ME27, Ulva Siding - 73ME29, Shackleton - 73ME30, Yelbeni - 73ME31 (3).
1973 Long Term Rotation Trials, Ian Rowland
1973 Long Term Rotation Trials, Ian Rowland
Experimental Summaries - Plant Research
The results shown are the yield of grain harvested from crops grown after various lengths of pasture ley. Experiments - W56H, 66M29, 67BA6, 68E5, 68SG5, 69GE20,
Nebraska Groundwater Level (Decline & Rise), 1973
Nebraska Groundwater Level (Decline & Rise), 1973
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
Evaluation Of Nitrate Content Of Ground Water In Hall County, Nebraska, Rauf Piskin
Evaluation Of Nitrate Content Of Ground Water In Hall County, Nebraska, Rauf Piskin
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
Regional Hydrothermal Alteration Of The Leadville Limestone (Mississippian) Of Central Colorado, L. V. Benson
Regional Hydrothermal Alteration Of The Leadville Limestone (Mississippian) Of Central Colorado, L. V. Benson
United States Geological Survey: Staff Publications
Massive metallic-sulfide deposits were implaced in the Leadville Limestone {Mississippian) of Central Colorado less than 70 million years ago. The thermal fluids which precipitated ore at Gilman, Colorado have regionally altered the Leadville Limestone. The sequence of alteration began with the recrystallization of limestone to a dark medium~grained dolomite containing a homogeneous distribution of Fe. This Was followed by partial recrystallization of the medium-grained dolomite to coarse-clear dolomite which contains an inhomogeneous distribution of Fe. The resulting banded rock is known as "zebra rock" . Precipitation of Si0 2 (jasperoid) occurred next. The jaspe=oid formed prior to the deposition of …
Hydrogeology Of A Sanitary Landfill, Mandan, North Dakota, Raymond D. Butler
Hydrogeology Of A Sanitary Landfill, Mandan, North Dakota, Raymond D. Butler
Theses and Dissertations
The data from this study can be applied to much of southwestern North Dakota because the geologic and climatic conditions are similar.
The Mandan landfill is on the Heart River floodplain and next to the river on the north and steep valley wall on the south. The sanitary landfill bas been used for over 20 years.
The only pre-Pleistocene unit exposed is the Cannonball Formation, which is interbedded sand, silt, and clay. Quaternary units consist of till, fluvial sand, silt, clay, and gravel, and eolian sand and silt.
A local flow system recharges on the upland next to the valley …
Ordovician Corals Of The Williston Basin Periphery, Frank P. Caramanica
Ordovician Corals Of The Williston Basin Periphery, Frank P. Caramanica
Theses and Dissertations
Tabulate and rugose corals are described from the Ordovician Red River) Stony Mountain, and Stonewall Formations in southern Manitoba and the Ordovician Bighorn Formation in northern Wyoming. Fifty-four species, 12 of which are new, are distributed in 20 genera. The Flower Model of coral evolution, based on wall microstructure of colonial corals, is extended to include the septa! Microstructure of colonial and solitary corals. "Primitive" corals are characterized by non t-rabeculate walls and septa whereas "advanced" forms are characterizedby trabeculate walls and septa. "Mid-range" corals are those with intermediate stages of trabecular development in walls .and septa. Corals in the …
The Fauna And Paleoecology Of The Charleston Quarry Shale, James Karl Gilliam
The Fauna And Paleoecology Of The Charleston Quarry Shale, James Karl Gilliam
Masters Theses
The fauna and paleoecology of a late-Pennsylvanian shale contained in the Livingston Limestone of eastern Illinois is here defined. The name, Charleston quarry shale, is informally used for this shale in the area of the Charleston Stone Company quarry, northeast of Charleston, Illinois (SEC. 32, T. 13N., R. 10E., Coles Co.).
The fauna consists mostly of bryozoans, brachiopods and crinoids distributed throughout three distinct zones in the Charleston quarry shale. This fauna inhabited an offshore quiet bottom area in a shallow, warm, marine epicontinental sea which covered the area in the late-Pennsylvanian geologic period. The depth of water above the …