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Ore Controls And Formation Of The Ore-Bearing Structures In The Idarado Mines, San Miguel And Ouray Counties, Colorado, S. R. Sanjines

Theses and Dissertations

Two major ore-bearing veins were studied on two levels in the Idarado mine, on the northwestern flank of the San Juan Mountains of southwestern Colorado. The Argentine vein, striking N. 10°-20° W. and dipping 75°-85° W., and the Cross vein, striking N. 45°-50° W. and dipping 50° W. represent the two systems to which all productive veins of the mine belong. Although not formed simultaneously, all veins represent mid-Tertiary mineralization associated with volcanism that formed the San Juan Mountains. Vein minerals are galena, sphalerite, chalcopyrite, silver (probably as sulfides), and gold in a gangue of pyrite, quartz, calcite and epidote. …

The Geology Of The Elliston Area, Western Montana, Thomas R. Walker

Theses and Dissertations

The Elliston area includes four townships located along the continental divide west of Helena, Montana on the northwest margin of the Boulder Batholith and within the Laramide disturbed belt. Strata ranging in age from Precambrian through recent are present, with all but the Ordovician, Silurian, and Triassic System& represented. The sedimentary rocks are mainly marine and continental carbonates, shales, and sandstones typical of a relatively stable shelf. The Precambrian Belt "Series" comprise the oldest rocks. The lower Cretaceous Blackleaf Formation is the youngest pre-Laramide unit. Post-Laramide sediments include fine-grained mid-Tertiary basin fills, terrace gravels, a moraine, and a mantle of …

The Surface Morphology Of A Small Drainage Basin In The North Dakota Badlands, J. Ladd Hagmaier

Theses and Dissertations

To describe the surface morphology of a fourth order drainage basin located in the North Dakota Badland,, the writer made quanti tative application• of known descriptive techniques and morphological laws.

The surface configuration is a function of the study area's linear, areal, and relief properties and surface elements. The linear and areal properties are determined from maps showing the drainage basin 's surface geometry, the relief properties are determined from large-scale topographic maps of the area, and the surface elements are determined by direct field measurements of the ground slopes, surface materials, and vegetal coverage.

The surface geometry of the …

Bivalvia And Paleoecology Of The Fox Hills Formation (Upper Cretaceous) Of North Dakota, Rodney M. Feldmann

Theses and Dissertations

The bivalve fauna of the Fox Hills Formation, Maestrichtian, of North Dakota was studied in an attempt to modernize the nomenclature of known bivalves, describe new forms, interpret the relationships of members of the formation, and establish the paleoecological setting in which the Fox Hills was deposited.

The Fox Hills Formation crops out in Logan, Emmons, Sioux, Morton, Burleigh, Kidder, Pierce, McHenry, Bottineau, and Bowman counties in North Dakota. It is best exposed along the Missouri River in south-central North Dakota. Traditionally, the formation has been subdivided into four members, all of which are exposed in the type area of …

Stratigraphy And Sedimentology Of The Tongue River Formation (Paleocene), Southeast Golden Valley County, North Dakota, Jack W. Crawford

Theses and Dissertations

The exposed Tertiary rock units in southeast Golden Valley County, North Dakota were measured and described with particular emphasis on the Tongue River Formation. Lithologic samples were collected and analyzed for total carbonate content, particle size, particle roundness, and mineral composition. In the area studied, the Tongue River Formation is 763 feet thick which is considerably thinner than in surrounding areas. The lower member of the Tongue River Formation is 313 feet thick and is composed of yellow-gray, very fine-grained sandstone, siltstone, claystone, shale, and lignite. The overlying Sentinel Butte Member is 450 feet thick and composed of yellow-brown, fine …

Recent Fluvial Geology In Western North Dakota, Thomas M. Hamilton

Theses and Dissertations

The thesis here abstracted was written under the direction of Lee Clayton and approved by Walter L. Moore -and John R. Reid as members of the examining connnittee, of which Mr. Clayton was chairman.

In western North Dakota many drainage channels that are incised into valley fill are characterized by steep, unvegetated sides. Many such channels contain actively eroding scarps. The origin of these scarps is most frequently related to increased water velocity causing accelerated erosion on a steepened reach of the valley flat.

The principal mechanism of scarp migration is soilfall which is initiated by undercutting of the scarp …

The Hell Creek Formation In North Dakota, Charles I. Frye

Theses and Dissertations

This paper is a discussion of the surface stratigraphy and petrology of the Hell Creek Formation in North Dakota and eastern Montana. Principal area of study included the Missouri Valley south of Bismarck, North Dakota; the Little Missouri Valley in Slope and Bowman Counties, southwestern North Dakota; the Yellowstone Valley near Glendive, Dawson County, Montana; and the type area of the Hell Creek Formation on Hell Creek and East Hell Creek, Garfield County, Montana on the south shore of the Fort Peck Reservoir.

Two and one-half summers were spent in the field measuring 72 stratigraphic sections, correlating between the measured …

Hydrogeology Of The Shell Creek Area, Mountrail County, North Dakota, Robert G. Willson

Theses and Dissertations

A field study of the geology and hydrology of the Shell Creek area in southeastern Mountrail County, North Dakota, was made during 1966 in order to determine the hydrogeology of the area. Six lithostratigraphic and lithologic units were mapped. Samples were analyzed for grain size and mineralogy. Those units are the Fort Union Group, the “Lostwood” slightly-gravelly loam, the “Lostwood” sand-gravel, the “Lostwood” silt-clay, the “Little-Knife Formation”, and the “Coteau Formation”. Mine average maximum slope and drainage integration units were used to map the morphology of the area.

There are four magnitudes of flow systems observed in the Shell Creek …

Geology And Structure Of A Portion Of The Rio Puerco Fault Belt, Western Bernalillo County, New Mexico, Jock Campbell

Earth and Planetary Sciences ETDs

The Rio Puerco fault belt is a transitional feature between the Colorado Plateau and the Rio Grande depression in west-central New Mexico.

The major purpose of this report has been to map in detail a portion of the Rio Puerco fault belt not previously investigated thoroughly. The main interest herein is the structure of the area. Particular attention has been given to the determination of the character of the Apache graben. Secondary emphasis is placed on stratigraphy, as more complete reports concerning the sedimentary section can be found elsewhere.

Twelve Maps Summarizing The Geologic Framework Of Southeastern Nebraska, R. R. Burchett, M. P. Carlson

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

Surficial Geology Of The Las Vegas Quadrangle, Nevada, Charles Edgar Price Jr

UNLV Theses, Dissertations, Professional Papers, and Capstones

The Las Vegas 15-minute quadrangle, located in the south part of the state of Nevada, includes about 240 square miles in and around the city of Las Vegas; it is in the basin and range province. The quadrangle includes a broad valley floor that was once a lake bottom, a bordering area of badlands and rolling hills developed in Tertiary and Quaternary deposits, an outer marginal area of alluvial fans, and the surrounding mountains.

The mountains constitute about three per cent of the total land surface and are composed of rock ranging in are from Precambrian to Tertiary. The remainder …

Availability And Use Of Water In Nebraska, F. Butler Shaffer

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

Evidence Of Multiple Glaciation In The Glacial - Periglacial Area Of Eastern Nebraska, E. C. Reed, V. H. Dreeszen, J. V. Drew, V. L. Souders, J. A. Elder, J. D. Boellstorff

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

Stratigraphy Of The Laketown Dolostone, North-Central Utah, David R. Budge

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The main objective of the present study is to provide a greater understanding of the strata referred to as the Silurian System in north-central Utah and southeastern Idaho and to serve as a basis for comparative regional studies in Silurian stratigraphy. It may be properly classified as a detailed reconnaissance of limited areal extent involving a single stratigraphic unit. It is based on field work done intermittently during the summer months of 1963-65 and laboratory and library work accomplished during the intervening winter months.

Water Levels In Observation Wells In Nebraska, 1965, Philip A. Emery, Mildred M. Malhoit

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

An X-Ray Diffraction Study Of Some Of The Naturally Occurring Iodates., Seymour F. Kaplan

Earth and Planetary Sciences ETDs

The iodate minerals, bellingerite, dietzeite, lautarite, and schwarzembergite were studied using x-ray diffraction methods.

The unit cell dimensions of lautarite, Ca(IO3)2, previously reported, are ao=7.18, bo=11.38, co=7.32, b=106 22’. Those dimensions are confirmed by powder diffraction methods for American Museum of Natural History Specimen No. 17150. The space group is either P2, Pm, or P2/m. The pattern listed os ASTM Card No. 1-0386 corresponds to CA(IO3)2*nH2O, not to lautarite as stated.

Upper Cretaceous-Lower Cenozoic Foraminifera From An Oil Well In Northwestern Iraq, Farouk Sunallah Al-Omari

Masters Theses

"Twenty-five samples of well cuttings from the Iraq Petroleum Company Butmah Number 9 Well in northwestern Iraq, at approximately 36° 37' north latitude and 42° 41' east longitude, have been examined in detail. The boundary between the Upper Cretaceous and lower Cenozoic is recorded as closely as possible on the basis of the microfaunal assembalges. A unit showing equivalence to the Danian Stage also is recognized"--Abstract, page ii.

Tectonic Analysis Of Mare Humorum On The Lunar Surface, Adnan Said Abul-Husn

Masters Theses

"Morphology and internal structures of surface features of the Mare Humorum area were interpreted from photographs and topographic maps. The postulated origin of certain features is based on analog comparisons with known terrestrial features. The laws of crate ring and a newly developed computer program were applied to two representative classes of craters to determine the possibility of a meteoritic impact origin. Some of the craters formed by meteoritic impact and others, including those with a radius larger than 10 Km, probably resulted from volcanic activity.

Mare Humorum formed from centripetal subsidence followed by extensive lava eruptions. Spacially related rilles …

Total Number Of Irrigation Wells Located In Nebraska Counties As Of 1966

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

Facts About Oil In Nebraska

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

Geochemical And Petrological Study Of The Precambrian Iron Metallogenic Province Of Southeast Missouri, Geza Kisvarsanyi

Doctoral Dissertations

"The general purpose of this dissertation was to investigate and establish petrological and geochemical relationships, if any, between the Precambrian iron deposits and associated host rocks. A more specific objective was to determine the distribution of some significant minor elements in the rocks and mineral deposits and to include specific mineralogical and petrological studies of the iron deposits and country rocks important to a better understanding of the genetic and geochemical relationships ... A primary task in the investigation was the study of the trace element population of individual iron deposits and establishment of differences, if they exist, between the …

Structure Contours On The Top And Base Of The M Bed, The Relationship Of Mineralization To Structures, And The Variation Of The M Bed Thickness In The Tri-State District, Missouri, Kansas And Oklahoma, Arvind A. Desai

Masters Theses

"Regional structure and thickness of a single horizon, the M bed, have been studied in the Tri-State district by picking the top and base of the M bed in the logs of 557 selected drill holes and contouring this data together with the aid of local detailed structural information available for individual mining fields. Structures determined from these data were compared to the positions of mined mineralization to determine the control of regional structure upon the localization of ore. Variations in the M bed thickness were compared to the positions of fields of mineralization to examine possible spatial relationships which …

Some Geological And Magnetic Characteristics Of Buried And Resurrected Precambrian Hills Of Southeastern Missouri, James Edward Palmer

Doctoral Dissertations

"PURPOSE AND SCOPE OF INVESTIGATION The major purpose of this investigation was to determine by a comprehensive study various geological and magnetic characteristics of buried and resurrected Precambrian hills of the Central Ozarks. A second important objective was the determination of characteristics which might aid in the location of buried Precambrian hills. A final objective was the testing of the magnetic surface integration method for identification and determination of depth of buried Precambrian hills.

This investigation is limited to buried and resurrected Precambrian hills of the Central Ozarks. It is concerned primarily with the structure and stratigraphy of sediments adjacent …

Origin And Factors Affecting Distribution Of Solid Oil In Mid-Western Missouri, Rafid Abdul-Halim Jasim

Masters Theses

"A textural analysis was made of the heavy oil-bearing sandstones in the Middle Pennsylvanian (Desmoinesian) Warner and Bluejacket formations of mid-western Missouri in order to determine and compare their depositional environments.

Grains of the Bluejacket sandstones are smaller and more rounded than grains of the Warner sandstones. The Bluejacket sandstone is also better sorted than the Warner sandstone.

The Bluejacket sandstone is thin-bedded; the Warner is mostly massive-bedded. These differences in bedding between the two formations have affected distribution of oil in the area of study.

Both the Bluejacket and Warner sandstones are better sorted than the Warrensburg sandstones; the …

Cenozoic And Recent Lunulitiform Bryozoans Of The Gulf And Atlantic Coasts, Ronald Greeley

Doctoral Dissertations

"Free, cup-shaped colonies of cheilostomatous bryozoans, equipped with vibracula, are termed lunulitiform bryozoans. This group is found in sandy and calcareous Cenozoic deposits of the Gulf and Atlantic Coastal Plains. Cupuliform bryozoans are taxonomically distinct from, but in many ways similar to, lunulitiform bryozoans; the two groups are frequently found together.

Known lunulitiform genera of the Gulf and Atlantic Coastal Plains are diagnosed and their species described: Lunulites Lamarck, fifteen species, one new; Oligotresium Gabb and Horn, six species, two new; Discoporella d'Orbigny, two species; Cupuladria Canu and Bassler, two species; Selenaria Busk, one species; Otionella Canu and Bassler, four …

Jurassic Stratigraphy Of The Southern Two-Thirds Of North Dakota, Richard A. Salisbury

Theses and Dissertations

Jurassic rocks in the southern two-thirds of North Dakota consist mainly of limestone, shale, anhydrite, and salt of the Piper Formation; shaly limestone, calcareous and non-calcareous shales of the Rierden Formation; shale and sandstone of the Swift Formation; and, at the top, non-marine shale and local sandstones of the Morrison Formation.

The units generally are conformable in the deep part of the Williston Basin, and are unconformable near the edge of the basin in eastern North Dakota. The Poe Member of the Piper Formation, however, unconformably overlies the Spearfish Formation in the western part of North Dakota where Dunham salt …

"Scoria" Of North Dakota, Robert J. Sigsby

Theses and Dissertations

No abstract provided.

Surficial Geology Of The Southern Half Of Griggs County, North Dakota, James C. Merritt

Theses and Dissertations

The southern half of Griggs County, in east-central North Dakota, lies entirely within the Young Drift section of the Central Lowlands physiographic province and is characterized by its undulating surface and nonintegrated drainage. The Kensel, Cooperstown, and Luverne phase of a Late Wisconsinan glaciation are largely responsible for the present appearance of the surface. The tills deposited during glacial stillstands cannot yet be differentiated by texture or X-ray diffreaction analyses, but the average shale pebble content of Kensel till is 16% higher than Cooperstown till.

Synthesis of Pleistocene history is based on the distribution of lithostratigraphic units and glacial geomorphic …

Surficial Geology Of Northern Griggs County, North Dakota, Laverne C. Rude

Theses and Dissertations

Griggs County, situated in the Western Lake section of the Central Lowland province, covers an area of 720 square miles in east-central North Dakota. The surface of the county is mantled with three, or possibly four Pleistocene drift sheets, separated by outwash deposits. These drift sheets lie unconformably on the Cretaceous Pierre Shale which is exposed in the Sheyenne River valley and the Binford Hills. Because the drift sheets have similar lithologic and physical characteristics, and are all late Wisconsin in age, they fulfill the requirements for a lithostratigraphic unit and are being considered for designation as part of the …

Ecology And Distribution Of Foraminifers Of A Traverse In The Northwestern Gulf Of Mexico, Faiz Nassir Thomas

Masters Theses

"Foraminiferal populations have been analyzed from five bottom samples along a traverse in the northwestern Gulf of Mexico, approximately 27⁰20' to 97⁰15' north latitude and 97⁰20' to 97⁰05' west longitude. Eighty-eight species and twenty-nine genera, belonging to eighteen families, were recorded. Species were identified and described.

Statistical studies indicate that probably five benthonic foraminiferal depth facies could be recognized in the area at the following approximate depths: 4 fathoms, 4-8 fathoms, 8-12 fathoms, 12-16 fathoms, and 16-20 fathoms. Determination of facies is based largely on the range of species. The frequency distribution of species of foraminifers was plotted against change …