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Articles 58081 - 58110 of 59351
Full-Text Articles in Entire DC Network
Some Aspects Of Geology As A Service To The Public, Robert J. Willard
Some Aspects Of Geology As A Service To The Public, Robert J. Willard
Journal of the Arkansas Academy of Science
No abstract provided.
Geology Of The East-Central Portion Of The Nelson Quadrangle, Clark County, Nevada, Tedral Kantor
Geology Of The East-Central Portion Of The Nelson Quadrangle, Clark County, Nevada, Tedral Kantor
Masters Theses
"The purpose of this investigation was to determine the unusually complex geology of a little-known area south of the Eldorado mining district, southern Clark County, Nevada. The area, mapped at a scale of 1:24000, comprises a segment of the northerly-trending Eldorado mountains in the southeast corner of the Great Basin. This rugged desert area is on a drainage divide between the Great Basin and the Colorado River. The rocks of the area consist of Precambrian gneisses and schists invaded by successive generations of Upper Cretaceous (?) - Tertiary igneous rocks. The older rocks, mainly biotite-chlorite gneisses, have resulted from high-grade …
Certain Features Of Alteration In The Michigan Lavas And Their Genetic Interpretation, Peethambaram Doraibabu
Certain Features Of Alteration In The Michigan Lavas And Their Genetic Interpretation, Peethambaram Doraibabu
Masters Theses
"The origin of the alteration and copper mineralization in the Keweenawan lavas of the Upper Peninsula of Michigan is one of the well known controversial topics in Economic Geology. The literature on this problem is most extensive and an attempt was made in this thesis to first review as many aspects of the discussion as appeared to be necessary. This portion is necessarily extensive, and it is hoped that some new light has been thrown here on some patterns of approach or thought which, today, can hardly be called scientific.
Next, the observations made in the field, on hand specimens …
Certain Trace Element Distribution In The Searchlight, Nevada Quartz Monzonite, Clark County, Nevada, Jai Nandan Shrivastava
Certain Trace Element Distribution In The Searchlight, Nevada Quartz Monzonite, Clark County, Nevada, Jai Nandan Shrivastava
Masters Theses
"The once prosperous gold, silver, copper and lead mines of the Searchlight mining district, Nevada, are situated along the south and western margins of a large quartz monzonite body. This intrudes the Precambrian gneisses and younger lava flows. Associated mineral veins show an eccentric type of zoning around the intrusive.
Seven rock samples of the quartz monzonite representing different parts of the intrusive were analyzed petrographically and spectrographically. Modal analyses and various types of rock alteration were investigated petrographically. Spectrochemical analyses of the rock samples and their major minerals were carried out for certain trace elements. A semi-quantitative method was …
The Surficial Geology Of Southern Logan County, North Dakota, John W. Bonneville
The Surficial Geology Of Southern Logan County, North Dakota, John W. Bonneville
Theses and Dissertations
Southern Logan County, North Dakota, was glaciated at least three different times during the Pleistocene epoch. Scattered patches of highly weathered iron-cemented drift found in the area of eroded Cretaceous bedrock in southwest-era Logan County are very possibly pre-Wisconsinan in age. Two younger drift sheets of Wisconsinan age cover the remaining portion of the county. One of these drifts, the Napoleon drift, is probably early Wisconsinan, and the other, the Burnstad-Streeter drift, is likely late Wisconsinan in age.
A great diversity in types of glacial topography and individual features is found in southern Logan County. Excellent examples of end moraine, …
Special Report (1960), Walter A. Lawrance
Special Report (1960), Walter A. Lawrance
Walter Lawrance Papers
No abstract provided.
Odor Report (1960), Walter A. Lawrance
Addition Of Sodium Nitrate (1960), Walter A. Lawrance
Addition Of Sodium Nitrate (1960), Walter A. Lawrance
Walter Lawrance Papers
No abstract provided.
Analytical Data (1960), Walter A. Lawrance
Analytical Data (1960), Walter A. Lawrance
Walter Lawrance Papers
No abstract provided.
Press Report (1960), Walter A. Lawrance
Wells In Fillmore County, Nebraska, C.F. Keech
Wells In Fillmore County, Nebraska, C.F. Keech
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
Groundwater Map Of Nebraska, November 1960, E. C. Reed, V. H. Dreeszen
Groundwater Map Of Nebraska, November 1960, E. C. Reed, V. H. Dreeszen
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
Wells In Hamilton County, Nebraska, C.F. Keech
Wells In Hamilton County, Nebraska, C.F. Keech
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
Geology Of The Area Between Virden And Red Rock, Hidalgo And Grant Counties, New Mexico, Biswa Pradhan
Geology Of The Area Between Virden And Red Rock, Hidalgo And Grant Counties, New Mexico, Biswa Pradhan
Earth and Planetary Sciences ETDs
The area between Virden and Red Rock is located in southwestern New Mexico, about 30 miles northwest of the town Longsburg. Mapping covered an area of about 94 square miles.
This report deals with the stratigraphy of sedimentary and igneous rocks of the area, with particular attention to the faunal and floral assemblages of Cretaceous sediments and the consequent determination of age of interbedded volcanic rocks.
Geology Of The East Potrillo Hills, Dona Ana County, New Mexico, William E. Bowers
Geology Of The East Potrillo Hills, Dona Ana County, New Mexico, William E. Bowers
Earth and Planetary Sciences ETDs
The East Potrillo Hills are essentially a low north-westerly trending ridge that lies just north of the Mexican border in southern Dona Ana County, New Mexico. The range is approximately 7 miles long and up to 1 1/2 miles wide. It is cut by transverse canyons that carry water to the bolson only during occasionally heavy rains. The crest of the ranges lies 700 to 900 feet above the extensive La Mesa plain which stretches for more than 20 miles to the north, east, and south. In the northern part of the range, the crest reaches a maximum elevation of …
Qualitative Reconnaissance Methods Of Geochemical Exploration, John Francis Brady Jr.
Qualitative Reconnaissance Methods Of Geochemical Exploration, John Francis Brady Jr.
Earth and Planetary Sciences ETDs
No abstract provided.
Upper Cretaceous Farmington Sandstone Of Northeastern San Juan County, New Mexico, Ottis L. Dilworth
Upper Cretaceous Farmington Sandstone Of Northeastern San Juan County, New Mexico, Ottis L. Dilworth
Earth and Planetary Sciences ETDs
The Upper Cretaceous Farmington sandstone is found only in northwestern New Mexico and Southwestern Colorado. The Farmington sandstone is the middle member of the Kirtland shale, there being a Kirtland shale member above and below it. This sandstone unit appears as an extensive wedge in the Kirtland shale and thins northward, southward, and southeastward from Townships 30-31 North, Ranges 9-13 West. The thickness of the Farmington sandstone ranges from 27 to 818 feet within the area of this thesis. The unit is correlative with parts of the Vermejo formation of the Raton basin and the Fox Hills formation of the …
Geology Of The San Pedro Mountains Santa Fe County, New Mexico, William W. Atkinson Jr.
Geology Of The San Pedro Mountains Santa Fe County, New Mexico, William W. Atkinson Jr.
Earth and Planetary Sciences ETDs
No abstract provided.
Water Resources Of The Western Slopes Of The Sandia Mountains, Bernalillo And Sandoval Counties, New Mexico, Eugene R. Caprio
Water Resources Of The Western Slopes Of The Sandia Mountains, Bernalillo And Sandoval Counties, New Mexico, Eugene R. Caprio
Earth and Planetary Sciences ETDs
The purpose of the study on which this thesis is based is to determine the source, occurrence, characteristics, and possible amounts of surface and ground water available along the western slope of the Sandia Mountains, New Mexico.
Geology Of The Northern Part Of The Fra Cristobal Range, Sierra And Socorro Counties, New Mexico, John T. Mccleary
Geology Of The Northern Part Of The Fra Cristobal Range, Sierra And Socorro Counties, New Mexico, John T. Mccleary
Earth and Planetary Sciences ETDs
The northern part of the Fra Cristobal Range contains rocks of Precambrian, Cambrian, Pennsylvanian, Permian, Cretaceous, Tertiary and Quaternary age. One of the northernmost exposures in New Mexico of the Cambrian Bliss formation occurs in the central part of the range. Here the bliss formation wedges out due to widespread pre-Pennsylvanian erosion which removed all the other lower Paleozoic rocks.
The Pennsylvanian Magdalena group, which is predominately limestone, rests uncomformably on Precambrian rock and the Bliss Formation. It forms the greatest part of the sedimentary sequence and is divided into three formations; the Red House, Nakaye, and Bar B formations …
A Magnetic Survey In The Rio Grande Depression, John W. M'Gonigle
A Magnetic Survey In The Rio Grande Depression, John W. M'Gonigle
Earth and Planetary Sciences ETDs
A vertical magnetic survey of a part of the Albuquerque basin was made in the fall and winter of 1959 to test the feasibility of detecting major faults in the Precambrian basement rocks.
Controls On Paradox Salt Deposition In The Area Of Comb Monocline San Juan County, Utah, Jim S. Hinds
Controls On Paradox Salt Deposition In The Area Of Comb Monocline San Juan County, Utah, Jim S. Hinds
Earth and Planetary Sciences ETDs
This study was undertaken for the purpose of delineating the configuration of the Paradox salt wedge edge in relation to the Comb monocline structure. It was designed to illustrate whether or not, and to what extent, the Comb structure was a submarine barrier controlling deposition of sediments on the western shelf of the Paradox seaway during middle Paradox time.
Water Levels In Observation Wells In Nebraska, 1959, C. F. Keech
Water Levels In Observation Wells In Nebraska, 1959, C. F. Keech
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
Studies In Iron Chlorosis Of Leaves, Narayan Gunderao Perur
Studies In Iron Chlorosis Of Leaves, Narayan Gunderao Perur
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Normal healthy growth and development of plants is controlled by certain factors known as factors of plant growth. They are soil, climate, and plant inheritance. The soil contains many nutrient elements needed by plants both in macro and micro quantities. Iron is one of the essential elements required by plants in small amounts.
When plants are starving for any of the essential nutrients, characteristic symptoms usually appear as certain abnormalities, discoloration and deformation of leaves, fruits, and other parts. The deficiency symptoms, though not easily recognizable in some cases at the beginning, are quite apparent in advanced stages of plant …
The Temperature Dependence Of The Drying Of Horizontal Soil Columns, Craig Loren Wiegand
The Temperature Dependence Of The Drying Of Horizontal Soil Columns, Craig Loren Wiegand
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
A consideration of the physical principles involved in evaporative drying of soil indicates that several physical processes might possibly limit the rate of evaporation. These include the rate of supply of energy to the site of evaporation, the rate of transfer of water vapor through the sample or through the atmosphere above the sample, and the rate of unsaturated flow of water to the soil surface or to the site of evaporation.
The Effect Of The Method Of Irrigation And Fertilizer Application On The Movement Of Nitrates In The Soil, Lavoir A. Banks
The Effect Of The Method Of Irrigation And Fertilizer Application On The Movement Of Nitrates In The Soil, Lavoir A. Banks
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
It is generally recognized that one of the most important factors limiting crop production is soil nitrogen. Farmers today are using more nitrogen fertilizers than ever before. All indications show that this usage will probably continue to increase. With the expanded use of nitrogen, it has become desirable to increase the efficiency from nitrogen fertilizers. One factor which will affect the efficiency is the position of the nitrogen in the soil in relation to the plant roots.
Hydrogen Bonding Between The Carbonyl Group And Wyoming Bentonite, Robert A. Kohl
Hydrogen Bonding Between The Carbonyl Group And Wyoming Bentonite, Robert A. Kohl
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The vibrational frequencies of atom to atom bonds within a molecule are a function of the bond energies. Each bond has its characteristic frequency, and most of these frequencies can be detected with the infrared spectrophotometer. When one compound reacts with another or is adsorbed on the surface of a solid, detectable frequency changes or shifts may occur. These changes or shifts yield valuable information about the bonds which are formed or broken.
The Influence Of Soil Moisture Suction And Evaporative Demand On Actual Evapotranspiration And Yield Of Alfalfa, Bozorg Bahrani
The Influence Of Soil Moisture Suction And Evaporative Demand On Actual Evapotranspiration And Yield Of Alfalfa, Bozorg Bahrani
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Evapotranspiration has been defined as the combination of evaporation of water from the soil surface and transpiration of water by vegetation. If the ground is well covered by plants, most of the water is lost by transpiration of water directly from the plant tissue, rather than by evaporation of water directly from the soil surface. The term consumptive use is synonymous with evapotranspiration.
Spores Of The Pennsylvanian Toronto Limestone In Kansas And Oklahoma, James F. Carter
Spores Of The Pennsylvanian Toronto Limestone In Kansas And Oklahoma, James F. Carter
Earth and Planetary Sciences ETDs
The Toronto cyclothem is the lower limestone member of the Oread megacyclothem of the Shawnee group, Virgilian series, Pennsylvanian system and crops of in a linear belt extending north-south for a distance of 300 miles across Oklahoma, Kansas, and parts of Missouri and Nebraska.
Reclaiming Salt Land With Bluebush, Stanley Thomas Smith
Reclaiming Salt Land With Bluebush, Stanley Thomas Smith
Journal of the Department of Agriculture, Western Australia, Series 4
IN Western Australia there are approximately a million acres of salt land, some of which is a serious economic problem to individual farmers, unfortunate enough to have the major portion of their properties affected by salt encroachment.