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Articles 29041 - 29070 of 29983
Full-Text Articles in Entire DC Network
Sedimentary Features And Geochemistry Of The Sulphide Facies In The Transition Between The Lamotte Sandstone And The Bonneterre Formation In The Fredericktown Area, Madison County, Missouri, Farouk El Baz
Masters Theses
"SCOPE AND PURPOSE The Lead Belt area of southeast Missouri, which is nearly 40 km. long and 10 km. wide, is considered, at the present time, the most important lead district in the world. Lead has been mined in this area by the natives prior to 1720, and almost continuously up to the present day. A variety of sulphides are mined from different places in the district.
The sulphide deposits in the Lead Belt are considered to be typical examples of the Mississippi Valley Type Deposits, which are distributed all over the world. As in practically all the Mississippi Valley …
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.
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.
Cyclic Sedimentation Of The Upper Fayetteville Formation, Faramarz Frouzan
Cyclic Sedimentation Of The Upper Fayetteville Formation, Faramarz Frouzan
Masters Theses
"In the past decade considerable interest has developed in the geology of the Boston Mountain area of northern Arkansas. This has been due to exploration for oil and gas in-the area and the related desire to know more about the structure and stratigraphy of the region. Principal work has been done by the University of Arkansas, the United States Geological Survey, and oil companies. This study involves only one of the formations making up the geologic column in the Boston Mountains, the Upper Mississippian (Chesterian Series) Fayetteville Formation.
Portions of the upper part of the Fayetteville Formation of northwestern Arkansas …
Application Of Palynology To The Study Of Tertiary Rocks Of The Coastal Plain Of Arkansas, Eugene L. Jones
Application Of Palynology To The Study Of Tertiary Rocks Of The Coastal Plain Of Arkansas, Eugene L. Jones
Journal of the Arkansas Academy of Science
No abstract provided.
Early History Of Malad Valley, Glade F. Howell
Early History Of Malad Valley, Glade F. Howell
Theses and Dissertations
The Malad Valley is geographically located in a unique position in the Pacific Northwest. The Bear River and its main affluent, the Malad River, are the only rivers in the Pacific Northwest that drain into the Great Basin, whereas the other streams and rivers of the states of Washington, Idaho, and Oregon empty eventually into the Pacific Ocean. It is also characterized for being the northern end of prehistoric Lake Bonneville, and eventually it was through this valley that an outlet opened to drain the lake. The soil deposits from this lake left a fertile valley, capable of producing most …
Method Of Teaching Basic Crystallography To The Beginning Student, Robert J. Willard
Method Of Teaching Basic Crystallography To The Beginning Student, Robert J. Willard
Journal of the Arkansas Academy of Science
No abstract provided.
Factors That Influenced Homesteading And Land Abandonment In San Juan County, Utah, Melvin J. Frost
Factors That Influenced Homesteading And Land Abandonment In San Juan County, Utah, Melvin J. Frost
Theses and Dissertations
Homesteading in San Juan County, Utah is for the most part, located on Sage Plain at elevations between 6,000 to 7,200 feet. Sage Plain is an undulating surface deeply dissected with canyons. The soil is relatively shallow and the predominant vegetation is pinyon, juniper, sage brush and blue-stem grass.
The 52 year mean precipitation is 15.47 inches. Since the beginning of weather records there has been a noticeable decrease in the annual precipitation. There is generally sufficient moisture to mature winter wheat. Pinto beans are also grown in the more favorable locations.
Principle factors that have influenced homesteading and land …
Comprehensive Survey Of Sedimentation In Lake Mead, 1948-49, W. O. Smith, C. P. Vetter, G. B. Cummings, U.S. Bureau Of Reclamation
Comprehensive Survey Of Sedimentation In Lake Mead, 1948-49, W. O. Smith, C. P. Vetter, G. B. Cummings, U.S. Bureau Of Reclamation
Publications (WR)
Reservoirs are becoming an increasingly prominent feature of the American landscape. Built for flood mitigation and to change a fluctuating river into a dependable source of water for irrigation, power, and other purposes, they are predestined, like natural lakes, to be destroyed sometime following their creation. Sedimentation sooner or later robs most lakes and reservoirs of their capacity to store water. The significance of sedimentation in the life of Lake Mead, the largest artificial reservoir in the world, was realized when the plan for the reservoir was conceived, and an aerial survey of the floor was made in 1935 before …
Occurrence Of Mineralized Ground Water In Southern St. Louis And Jefferson Counties, Missouri, Willard Glennon Owens
Occurrence Of Mineralized Ground Water In Southern St. Louis And Jefferson Counties, Missouri, Willard Glennon Owens
Masters Theses
"Mineralized ground water occurs at some localities in southeastern St. Louis and northern Jefferson counties, Missouri. This water is usually undesirable and is detrimental to development of ground water resources.
Water well records in the offices of the Missouri Geological Survey and Water Resources provided data for a study of structure, lithology and occurrence of ground water. Water well drillers and property owners were interviewed to obtain additional information concerning drilling problems and quality of water.
Geologic cross-sections, subsurface contour maps and isochlorinity maps aided the study of lithology, structure and areal distribution of mineralized ground water. Relationship is suggested …
Mississippian Bioherms Of Southwestern Missouri And Northwestern Arkansas, Arthur R. Troell Jr.
Mississippian Bioherms Of Southwestern Missouri And Northwestern Arkansas, Arthur R. Troell Jr.
Masters Theses
"Lenticular bodies of massive limestone, flanked by thin crinoidal beds, crop out in southwestern Missouri and northwestern Arkansas. They are within the St. Joe limestone of the Lower Mississippian.
Strata underlying these bodies typically are down-warped, those on the flanks lapping against, finally passing completely over the limestone core. Dips away from the “reef” are commonly around 5 degrees, but reach as much as 30 degrees. Conglomeratic detritus, originating from the core, occurs in flanking beds at their contact with it.
Thin sections of these masses show no more than 15 per cent of the limestone to consist of fossil …
Glacial Geology Of South-Central Kidder County, North Dakota, Barrett J. Williams
Glacial Geology Of South-Central Kidder County, North Dakota, Barrett J. Williams
Theses and Dissertations
South-central Kidder County is covered with deposits of drift brought by ice sheets which invaded the areas from the northeast and east. Bedrock of Cretaceous age underlies the drift mantle. The drift on the surface in Kidder County represents the Cary and Mankato substages of the Wisconsin Stage of Pleistocene series.
Three types of moraines, ground, stagnation, and end moraine, are present in the area. Five late Wisconsin and moraines are distinguished and named in this portion of Kidder County. These are, from west to east and oldest to youngest, the Long Lake loop and Sibley Buttes loop of Cary …
Pleistocene Geology Of Northern Kidder County, North Dakota, James Chmelik
Pleistocene Geology Of Northern Kidder County, North Dakota, James Chmelik
Theses and Dissertations
The topography of northern Kidder County is due almost entirely to glacial deposition. This are is covered with glacial drift up to a thickness of at least 269 feet which was deposited during Wisconsin ice advances. Seventy-five percent of the area has stagnation moraine which typically exhibits knob-and-kettle topography, has high local relief with no linear trends, and which was deposited after the ice became stagnant. Many kames and eskers were formed contemporaneously with stagnation moraine. The names, Lake Williams and Woodhouse Lake loops, and proposed for and moraines deposited by Cary and Mankato ice advances, respectively. The Lake Williams …
Comparative Petrographic, Petrochemical And Spectrographic Analyses Of The Precambrian Granitic Rocks Of Southeastern Missouri, Eva B. Kisvarsanyi
Comparative Petrographic, Petrochemical And Spectrographic Analyses Of The Precambrian Granitic Rocks Of Southeastern Missouri, Eva B. Kisvarsanyi
Masters Theses
"Petrographic, petrochemical and spectrographic studies were completed on selected Precambrian granitic rock samples from Southeastern Missouri. This investigation contributes to a more detailed knowledge of the Precambrian granitic rocks of this part of the state.
Petrographic analysis of forty-four thin sections of granitic rocks from the St. Francois Mountains area revealed six different granite types. These have been named the Fredericktown, Knoblick, Doerun, Graniteville, Klondike and Silvermine granites. These rocks form a large part of a composite batholith. More than one period of granitic intrusion is represented, but differentiation also contributed to the formation of this diversity of the rocks. …
Stratigraphy Of The Winnipeg And Deadwood Formations In North Dakota, Clarence G. Carlson
Stratigraphy Of The Winnipeg And Deadwood Formations In North Dakota, Clarence G. Carlson
Theses and Dissertations
The Deadwood formation includes all of the pre-Winnipeg sedimentary rocks of North Dakota which range in thickness from an erosional edge in the subsurface of northeastern North Dakota to at least 1,000 feet in northwestern North Dakota. It is composed of sandstone, shale, and carbonate of Late Cambrian to Early Crdovician age. Facies relationships are not entirely clear, but sedimentation appears to have been continuous from Late Cambrian to Early Crdovician in the Williston Basin. Conodonts from the upper part of the Deadwood formation in northwestern North Dakota are brownish-black, mostly simple cone types and suggest an Early Drdovician age …
The Surficial Geology Of North-Central Kidder County, North Dakota, Wallace E. Bakken
The Surficial Geology Of North-Central Kidder County, North Dakota, Wallace E. Bakken
Theses and Dissertations
Kidder County is situated in central North Dakota within the glaciated Missouri Plateau. Rocks underlying the drift range from Cretaceous (Pierre formation) through Palocene (Tongue River formation) in age. The Pierre and Fox Hills formations constitute the majority of the pre-Pleistocene surface. Ice-shove deformation, apparently during Cary time, tilted blocks of Fox Hills in the Sibley Buttes into northeastward-dipping positions.
Cary and Mankato subages of Wisconsin age are represented at the surface. Ages are difficult to assign to drift sheets on the basis of lithology or degree of weathering of included tills; but by correlation from South Dakota and crosscutting …
An Investigation Of The Bakken And Englewood Formations (Kinderhookian) Of North Dakota And Northwestern South Dakota, Jack Kume
Theses and Dissertations
Lower Mississippian rocks of the Williston Basin and Black Hills include the Bakken and Englewood formations of Kinderhockian age. The Englewood formation crops out in the northern Black Hills and can be traced with difficulty into the subsurface. The Bakken formation does not crop out in the area out in the area of this study. This study is based upon well sample and mechanical log information and measured surface sections.
The Englewood in the outcrops consists of a lower shale unit, a middle argillaceous and shaly limestone unit, and an upper delomitie limestone unit. A type section, NW, SE; see. …
An Aeromagnetic And Geologic Reconnaissance Survey Of The Sidney - Augusta And Gardiner Areas : Kennebec County, Maine, Lawrence A. Wing
An Aeromagnetic And Geologic Reconnaissance Survey Of The Sidney - Augusta And Gardiner Areas : Kennebec County, Maine, Lawrence A. Wing
Maine Collection
An Aeromagnetic and Geologic Reconnaissance Survey of the Sidney - Augusta and Gardiner Areas : Kennebec County, Maine
(GP & G Survey #5)
by Lawrence A. Wing, Chief Geologist, James W. Sewall Company, Old Town, Maine.
Maine Geological Survey, Department of Economic Development, Augusta, Maine - August 12, 1959.