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Articles 28621 - 28650 of 29715
Full-Text Articles in Physical Sciences and Mathematics
Geology And Ground-Water Resources Of Northern Lea County, New Mexico, Sidney R. Ash
Geology And Ground-Water Resources Of Northern Lea County, New Mexico, Sidney R. Ash
Earth and Planetary Sciences ETDs
The economy of northern Lea County is dependent upon groundwater; the only other source of water is the runoff from precipitation that is caught and retained in the man-made or natural reservoirs, where is it used for water stock. Irrigation utilizes most of the groundwater pumped; much smaller amounts are used for stock watering and industrial, public, rural and domestic supplies. In 1958, about 107,000 acre-feet of groundwater was pumped for irrigation and 19,000 acre-feet was pumped for all other uses. On the basis of present production of potable water, the economically usable supply will be depleted in certain areas …
Petrology Of The Precambrian Rocks Of Part Of The Monte Largo Area, Nm, Paul Wayne Lambert
Petrology Of The Precambrian Rocks Of Part Of The Monte Largo Area, Nm, Paul Wayne Lambert
Earth and Planetary Sciences ETDs
Approximately 7 to 8 square miles of Precambrian rocks are exposed in the vicinity of the Monte Largo Hills in north-central New Mexico. The Precambrian rocks are bounded mainly by Pennsylvanian sedimentary rocks in both fault and noncomformable contact.
The area is made up largely of quartz-feldspar gneiss, hornblende gneiss, and quartzite. Quartz-feldspar gneiss is the most abundant rock type. Mica schist and sillimanite hornfels occur in minor amounts. Other Precambrian rocks include medium-grained granite, splite and pegmatite dikes, and quartz veins. A minor amount of migmatite is present as a result of the intimate association of quartz-feldspar gneiss and …
The Structure And Stratigraphy Of The Frontier Formation In The Big Piney-La Barge Area Sublette And Lincoln Counties, Wyoming, Eldred D. Johnson
The Structure And Stratigraphy Of The Frontier Formation In The Big Piney-La Barge Area Sublette And Lincoln Counties, Wyoming, Eldred D. Johnson
Earth and Planetary Sciences ETDs
This study was undertaken to fulfill part of the requirements for the degree of Master in Science of Geology. The Big Piney-LA Barge area in western Wyoming covers approximately 354 square miles on the western edge of the Green River Basin and the eastern edge of the over thrust belt. The area is underlain by a sedimentary sequence containing rocks representing all the geologic time periods form the Cambrian through the Cenozoic, with the exception of the Silurian period. The entire known post-Precambrian strati-graphic sequence is approximately 18,00 feet thick.
A Petrographic And Environmental Study Of The Upper Cretaceous Greenhorn Limestone, New Mexico, John W. Emerson
A Petrographic And Environmental Study Of The Upper Cretaceous Greenhorn Limestone, New Mexico, John W. Emerson
Earth and Planetary Sciences ETDs
The Upper Cretaceous Greenhorn Limestone is composed of intercalated agrillaceous limestone and calcareous shale beds which crop out over much of the Western Interior. The Greenhorn was deposited in late Cenomanian and early Turonian time in a westward transgressing sea. In New Mexico the age is early Turonian. The edge of deposition extends as far south as Capitan and Carthage, northward through western Bernalillio County, and northwest through Toadlena.
Geology Of The Queen Lake Domes Near Malaga, Eddy County, New Mexico, George R. Reddy
Geology Of The Queen Lake Domes Near Malaga, Eddy County, New Mexico, George R. Reddy
Earth and Planetary Sciences ETDs
There are many domes in the vicinity of Queen Lake near the Pecos River in southern Eddy County. The rocks involved in the doming range in age from Permian to Recent. Their relationships indicate that there were two periods of doming, the first during early Pleistocene time and the second after the formation of Recent caliche.
Salt beds are present in the Salado and Castile formations beneath the area in which the domes are distributed. At Queen Lake the salt is within 300 feet of the surface. Farther east, the salt-bearing rocks are buried beneath Triassic and Cenozoic deposits. These …
Lithogenesis Of Atoll Sediments, Uliga Island, Majuro Atoll, Marshall Islands, Phyllis B. Helms
Lithogenesis Of Atoll Sediments, Uliga Island, Majuro Atoll, Marshall Islands, Phyllis B. Helms
Earth and Planetary Sciences ETDs
Sixteen thin sections and 53 samples of rock and sand were examined under petrographic and binocular microscopes to determine composition, kinds of cement, degrees of cementation, and the sequence of lithogenesis of the consolidated materials. Studies were made of the loose sediments to relate the characteristics of the sedimentary grains to environmental energy of today, and then collate these data with the lithified sediments.
Sedimentary Petrogenesis Of The Yeso-Glorieta San Andres Transition, Joyita Hills, Socorro County, New Mexico, James R. Huber
Sedimentary Petrogenesis Of The Yeso-Glorieta San Andres Transition, Joyita Hills, Socorro County, New Mexico, James R. Huber
Earth and Planetary Sciences ETDs
The transitional character of the middle Permian (Leonardian and Guadalupian) Yeso Formation, Glorieta sandstone, and San Andres formation in central New Mexico has been recognized in several reports (Needham and Bates, 1943; Wilpolt, et. al., 1946; Wilpolt and Wanek, 1951; and Boyd, 1958). Interpretation of the depositional history and environment of this sequence has been restricted to generalizations based on field observation.
A detailed petrographic study of the Yeso-Glorieta-San Andres transition at a single locality was undertaken in an attempt to gain better understanding of this stratigraphic interval.
Geology Of The Nutria Monocline, Mckinley County, New Mexico, R. John Edmonds
Geology Of The Nutria Monocline, Mckinley County, New Mexico, R. John Edmonds
Earth and Planetary Sciences ETDs
The Nutria monocline forms the northwestern boundary of the Zuni uplift in McKinley County, New Mexico. The sedimentary rocks that are exposed along the monocline range in age from Permian to Cretaceous and rest on Granite of probable Precambrian age. The Jurassic Todilto limestone, which is present north of the mapped area, pinches out in a southerly direction. South of this pinch-out the massive sandstone of the Entrada formation joins the main body of the Zuni sandstone. Only the even bedded, silty sandstone that has previously been considered to be the middle member of the Entrada is regarded as Entrada …
Geology Of The Sharp Mountain Area, Southern Part Of The Bear River Range, Utah, Preston L. Hafen
Geology Of The Sharp Mountain Area, Southern Part Of The Bear River Range, Utah, Preston L. Hafen
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The Sharp Mountain area is situated in the southern part of the Bear River Range in Utah. The geology of the Bear River Range to the north of this area, in Utah and Idaho, has been mapped; however, prior to this study little was known about the Sharp Mountain area. The purpose of this investigation are as follows: (1) to map and describe the geology of the area, and (2) to relate the stratigraphic and structural features of the Sharp Mountain area to those of the surrounding region.
Geology Of The Weston Canyon Area, Bannock Range, Idaho, Clair N. Murdock
Geology Of The Weston Canyon Area, Bannock Range, Idaho, Clair N. Murdock
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The Weston Canyon area comprises the southern part of the Bannock Range and northwestern part of the Malad Range in southern Idaho. Geologic investigations of adjacent areas date from 1871. These investigations have led to detailed geologic reports that cover much of the Wasatch Range, Bear River Range, Malad Range, Portneuf Range, and Cache Valley. The geology of the southern part of the Bannock Range, however, has not been studied in detail, and it is the purpose of this investigation to map and describe the geology of the Weston Canyon area and to correlate it with previously described geology of …
Water Levels In Observation Wells In Nebraska 1960, C.F. Keech
Water Levels In Observation Wells In Nebraska 1960, C.F. Keech
Conservation and Survey Division
No abstract provided.
Copper Minerals For Fertilizer Use, R N. Glencross
Copper Minerals For Fertilizer Use, R N. Glencross
Journal of the Department of Agriculture, Western Australia, Series 4
COPPER fertilizers have an important role in maintaining: and increasing Western Australia's agricultural production.
On many soils they are essential for cereal growing or pasture production and persistence and for animal health and wool quality.
They are also sometimes used for fruit trees, vines, and vegetables.
Geologic Section Of Bradley, Calhoun, Ouachita, And Part Of Nevada Counties, Arkansas, Donald R. Albin
Geologic Section Of Bradley, Calhoun, Ouachita, And Part Of Nevada Counties, Arkansas, Donald R. Albin
Journal of the Arkansas Academy of Science
A series of 23 test holes has been drilled across Bradley, Calhoun, Ouachita, and part of Nevada Counties in southcentral Arkansas to determine the geology of the shallow water-bearing deposits of Tertiary and Quaternary age . The correlation of the lithologic and electric logs of the test holes and available electric and drillers' logs of oil-test wells indicates that: (1) the transition zone in the upper part of the Midway group may be about 85 feet thick in Nevada and Ouachita Counties; (2) the contact between the Wilcox and Claiborne groups is about 12 miles northwest of the location shown …
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.
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, …
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 …
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 …
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
No abstract provided.
Wells In Fillmore County, Nebraska, C.F. Keech
Wells In Fillmore County, Nebraska, C.F. Keech
Conservation and Survey Division
No abstract provided.
Fusulinids From The Hess Member Of The Leonard Formation, Leonard Series (Permian), Glass Mountains, Texas, Charles A. Ross
Fusulinids From The Hess Member Of The Leonard Formation, Leonard Series (Permian), Glass Mountains, Texas, Charles A. Ross
Geology Faculty Publications
Five fusulinid zones are recognizable in the Hess member of the Leonard formation in the eastern Glass Mountains. These zones are useful for correlation and contain two species of Schwagerina, previously described, and five species of Parafusulina which are new. The assemblage of Schwagerina crassitectoria Dunbar and Skinner and S. gaembeli Dunbar and Skinner forms the lowest zone, Parafusulina allisonensis n. sp. forms the second zone, P. deitoides n. sp. and Parafusulina sp. A form the third zone. P. spissisepta n. sp. forms the fourth zone which includes the upper Hess fossil bed of P. B. King (1931), and …
Wells In Hamilton County, Nebraska, C.F. Keech
Wells In Hamilton County, Nebraska, C.F. Keech
Conservation and Survey Division
No abstract provided.
Bemerkungen Über Das Neogen Zwischen Çan Und Bandirma (Nw - Anatolien), Hartmann Wedding
Bemerkungen Über Das Neogen Zwischen Çan Und Bandirma (Nw - Anatolien), Hartmann Wedding
Bulletin of the Mineral Research and Exploration
No abstract provided.
Garnet Stone Occurrences In Keski̇n-Çelebi̇dağ Region, Sabit Yilmaz
Garnet Stone Occurrences In Keski̇n-Çelebi̇dağ Region, Sabit Yilmaz
Bulletin of the Mineral Research and Exploration
No abstract provided.
Geology Of The Hasanoğlan-Ankara Region, Utarit Bi̇lgütay
Geology Of The Hasanoğlan-Ankara Region, Utarit Bi̇lgütay
Bulletin of the Mineral Research and Exploration
No abstract provided.
Geology Of The Mut Region*, İbrahim Akarsu
Geology Of The Mut Region*, İbrahim Akarsu
Bulletin of the Mineral Research and Exploration
No abstract provided.
The Geology Of The Sequatchie Valley Overthrust Block, Sequatchie Valley, Tennessee, Robert Calvin Milici
The Geology Of The Sequatchie Valley Overthrust Block, Sequatchie Valley, Tennessee, Robert Calvin Milici
Doctoral Dissertations
Introduction: Abbreviated
The purpose of this investigation was twofold: (1) to decipher the nature of the thrust faulting of the anticline; and, (2) to study the stratigraphy of the Paleozoic formations of the Sequatchie Valley.
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 …
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.