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Articles 28381 - 28410 of 29715
Full-Text Articles in Physical Sciences and Mathematics
Twelve Maps Summarizing The Geologic Framework Of Southeastern Nebraska, R. R. Burchett, M. P. Carlson
Twelve Maps Summarizing The Geologic Framework Of Southeastern Nebraska, R. R. Burchett, M. P. Carlson
Conservation and Survey Division
No abstract provided.
Mohole» Projesi̇ Ve Uygulanmasi *, Muammer Çeti̇nçeli̇k
Mohole» Projesi̇ Ve Uygulanmasi *, Muammer Çeti̇nçeli̇k
Bulletin of the Mineral Research and Exploration
No abstract provided.
Gedanken Über Die Entstehung Der Erde Und Des Lebens, Hartmann Wedding
Gedanken Über Die Entstehung Der Erde Und Des Lebens, Hartmann Wedding
Bulletin of the Mineral Research and Exploration
No abstract provided.
Zur Geologie Und Metallogenese Des Gebietes Zwischen Yahyali (Kayseri̇) Und Zamantifluss, K. Vohryzka
Zur Geologie Und Metallogenese Des Gebietes Zwischen Yahyali (Kayseri̇) Und Zamantifluss, K. Vohryzka
Bulletin of the Mineral Research and Exploration
No abstract provided.
Sur L'Existence De Roches A Diaspore Dans La Région De Muğla, Sw De La Turquie, S. Ayrton, J. P. Vernet, R. Woodtli
Sur L'Existence De Roches A Diaspore Dans La Région De Muğla, Sw De La Turquie, S. Ayrton, J. P. Vernet, R. Woodtli
Bulletin of the Mineral Research and Exploration
No abstract provided.
The Significance Of The Geologic Time Factor In Metallogeny And Petrology, Mehmed Ramoviç
The Significance Of The Geologic Time Factor In Metallogeny And Petrology, Mehmed Ramoviç
Bulletin of the Mineral Research and Exploration
No abstract provided.
Availability And Use Of Water In Nebraska, F. Butler Shaffer
Availability And Use Of Water In Nebraska, F. Butler Shaffer
Conservation and Survey Division
No abstract provided.
Surficial Geology Of The Las Vegas Quadrangle, Nevada, Charles Edgar Price Jr
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 …
Stratigraphy Of The Laketown Dolostone, North-Central Utah, David R. Budge
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.
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
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
No abstract provided.
Water Levels In Observation Wells In Nebraska, 1965, Philip A. Emery, Mildred M. Malhoit
Water Levels In Observation Wells In Nebraska, 1965, Philip A. Emery, Mildred M. Malhoit
Conservation and Survey Division
No abstract provided.
The Feather Mite Genus Proctophyllodes (Sarcoptiformes: Proctopbyllodidae), Warren T. Atyeo, Norman L. Braasch
The Feather Mite Genus Proctophyllodes (Sarcoptiformes: Proctopbyllodidae), Warren T. Atyeo, Norman L. Braasch
Bulletin of the University of Nebraska State Museum
A systematic revision is presented for the genus Proctophyllodes. Data on the bionomics, morphology, and host-parasite relationships are included.
Ecology And Distribution Of Foraminifers Of A Traverse In The Northwestern Gulf Of Mexico, Faiz Nassir Thomas
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 …
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 …
Tectonic Analysis Of Mare Humorum On The Lunar Surface, Adnan Said Abul-Husn
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 …
Origin And Factors Affecting Distribution Of Solid Oil In Mid-Western Missouri, Rafid Abdul-Halim Jasim
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
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 …
Geochemical And Petrological Study Of The Precambrian Iron Metallogenic Province Of Southeast Missouri, Geza Kisvarsanyi
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 …
Some Geological And Magnetic Characteristics Of Buried And Resurrected Precambrian Hills Of Southeastern Missouri, James Edward Palmer
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 …
Total Number Of Irrigation Wells Located In Nebraska Counties As Of 1966
Total Number Of Irrigation Wells Located In Nebraska Counties As Of 1966
Conservation and Survey Division
No abstract provided.
The Stratigraphy Of The Sperati Point Quadrangle, Mckenzie County, North Dakota, Michael B. Clark
The Stratigraphy Of The Sperati Point Quadrangle, Mckenzie County, North Dakota, Michael B. Clark
Theses and Dissertations
The Sperati Point Quadrangle is in McKenzie County, northwestern North Dakota, about 30 miles south-southwest of Watford City, North Dakota. The quadrangle is bounded by Ts. 146-148 N., Rs. 100- 101 W., and encompasses an area of about: 54 square miles. The topography consists of weakly dissected upland plains and, adjacent to the Little Missouri River and tributaries, well dissected, well drained, badland areas characterized by extensive slumping. About 570 feet of the Sentinel Butte Member of the Tongue River Formation of Paleocene age is exposed in the quadrangle. The lower 200 to 250 feet is dominantly grayish, fine to …
Surficial Geology Of Northern Griggs County, North Dakota, Laverne C. Rude
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 …
Jurassic Stratigraphy Of The Southern Two-Thirds Of North Dakota, Richard A. Salisbury
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
"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
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 …
Upper Cretaceous-Lower Cenozoic Foraminifera From An Oil Well In Northwestern Iraq, Farouk Sunallah Al-Omari
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.
Geology Of The Acari Iron Mining District Arequipa, Peru, Raul Alejandro Zevallos
Geology Of The Acari Iron Mining District Arequipa, Peru, Raul Alejandro Zevallos
Masters Theses
"The Acari Iron Mining District, part of a tilted uplifted fault block, comprises an area about 300 square kilometers, in the southern part of the coastal belt of Peru. It is in the foothills of the western range of the Andes and it is dominantly formed by granodioritic and granitic intrusive rocks which belong to the Andean batholith of Cretaceous-Tertiary age. The intrusive rocks are overlain by a central, elongated, northwest trending band, of metasedimentary and volcanic rocks
The magnetite deposits of Acari district are long, dike-shaped bodies, which fill two systems of fractures in the granodiorite intrusive, located in …
Structure Of The Northern Portion Of The Dumplin Valley Fault Zone In East Tennessee, Robert Dean Hatcher Jr.
Structure Of The Northern Portion Of The Dumplin Valley Fault Zone In East Tennessee, Robert Dean Hatcher Jr.
Doctoral Dissertations
(From the Introduction) The purpose of this investigation is to study, synthesize, and interpret the structure of the Dumplin Valley family of faults and associated folds. The ultimate objective of the investigation is to present a clear, concise hypothesis for the origin of the structure. Finally, the writer has tried to relate the fault to other structures in East Tennessee, and to determine if the interpretation as formulated fits the regional tectonic picture.
Geology Of Copper-Lead-Zinc-Turquoise Deposits, Southern Part Of The Cerrillos Mining District, Santa Fe County, New Mexico, William G. Gustafson
Geology Of Copper-Lead-Zinc-Turquoise Deposits, Southern Part Of The Cerrillos Mining District, Santa Fe County, New Mexico, William G. Gustafson
Earth and Planetary Sciences ETDs
ABSTRACT
The southern part of the Cerrillos mining district is underlain by a sequence of igneous rocks which have been altered and mineralized. The rocks are intrusive equivalents of the Oligocene (?) Espinaso Volcanics. Four stages of intrusion are recognized. A hornblende monzonite porphyry stock was emplaced during stage T1. Several small hornblendeaugite monzonite stocks intruded stage T1 rocks during stagesT2 and T3. During stage T4, stocks of augite-biotite monzonite, hornblende-biotite monzonite porphyry, and andesineaugite-biotite monzonite porphyry were intruded into the older igneous rocks. The stage T1, T2, and T3 stocks are flanked by sills and laccoliths.
Three sets of …