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Articles 1591 - 1620 of 1654
Full-Text Articles in Other Earth Sciences
A Detailed Economic Investigation Of Geochemical And Aeromagnetic Anomalies North Central Maine, W. F. Stickney, R. S. Young, L. A. Wing
A Detailed Economic Investigation Of Geochemical And Aeromagnetic Anomalies North Central Maine, W. F. Stickney, R. S. Young, L. A. Wing
Maine Collection
A Detailed Economic Investigation of Geochemical and Aeromagnetic Anomalies North Central Maine
W.F.Stickney, R.S.Young and L.A.Wing
Special Economic Series No.4, Maine Geological Survey, Department of Economic Development, Augusta, Maine (March 1965).
Contents: Foreword / Part I - Geology (W.F. Stickney) / Part II - Geophysics (R.S. Young) / Part III - Geochemistry (L.A. Wing) / References
Slope Deposits Of The Pennsylvanian Haymond Formation, Marathon Region, Texas, Walter E. Dean Jr.
Slope Deposits Of The Pennsylvanian Haymond Formation, Marathon Region, Texas, Walter E. Dean Jr.
Earth and Planetary Sciences ETDs
The Haymond Formation of the Marathon basin, Texas consists mainly of a sequence of more than 12,000 siltstone-shale couplets which, combined with the similar couplets of the older Tesnus Formation, form a sequence of "flysch" sediments more than 10,000 feet thick deposited on the eastern slope of the subsiding Llanoria geosyncline. The Haymond Formation contains no diagnostic fossils; its age is known only as Lower Pennsylvanian, probably Atokan.
Geology Of The Sedillo-Cedro Canyon Area, Bernallio County, New Mexico, Bert Norman Brown
Geology Of The Sedillo-Cedro Canyon Area, Bernallio County, New Mexico, Bert Norman Brown
Earth and Planetary Sciences ETDs
This report was undertaken primarily as a study of Pennsylvanian strata which crop out in the Sedillo-Cedro Canyon area. The subdivision of the Madera formation as proposed by Read and others (1944) was adopted for purposes of mapping. This subdivision is based on a dominance of either limestone or clastic rocks in the formation.
The writer was unable to measure a Pennsylvanian section in the field due to thickness changes, facies gradations, and faults which were often concealed by dense soil cover. However, by visually traversing the area on aerial photographs using arbitrarily chosen zones, estimated thicknesses for the members …
Permian Stratigraphy And Stratigraphic Paleontology Of The Colorado Plateau, Peggy L. Kirkland
Permian Stratigraphy And Stratigraphic Paleontology Of The Colorado Plateau, Peggy L. Kirkland
Earth and Planetary Sciences ETDs
The purpose of this study is to synthesize a portion of this vast source of data in order to arrive at a better understanding of Permian stratigraphy.
Geology Of Torreon And Pedricenas Quadrangles, Coahuila And Durango, Mexico, Russell E. Clemons
Geology Of Torreon And Pedricenas Quadrangles, Coahuila And Durango, Mexico, Russell E. Clemons
Earth and Planetary Sciences ETDs
The Torreon and Pedricenas quadrangles are in central Mexico between parallels 25 degrees and 26 degrees N. and meridians 103 degrees 20' and 104 degrees W.; together they embrace 7,600 square kilometers. The northeastern corner of the area lies in the Bolson de Mapimi; most of the area, however, is in the Sierra Madre Oriental.
Hypogene Zoning In The Lordsburg Mine District, Hidalgo County, New Mexico, K. F. Clark
Hypogene Zoning In The Lordsburg Mine District, Hidalgo County, New Mexico, K. F. Clark
Earth and Planetary Sciences ETDs
Although descriptions of the Lordsburg mining district have been in the literature for more than fifty years, no reference to hypogene zoning of the ores has been made. The present work is mainly concerned with hypogene zoning and related phenomena. Hypogene zoning, temperature of formation, and paragenesis are interrelated factors in ores differentiated from magmas. All three processes are discussed in this thesis. Other aspects of the mining district are mentioned only where relevant.
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 …
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.
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.
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 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.
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.
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.
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.
Mineral Deposits Of The Granite Gap Area, Hidalgo County, New Mexico, David N. Cargo
Mineral Deposits Of The Granite Gap Area, Hidalgo County, New Mexico, David N. Cargo
Earth and Planetary Sciences ETDs
The Granite Gap area lies in the central part of the Peloncillo Mountains about 28 miles southwest of Lordsburg, New Mexico. Ores of lead, zinc, silver, and tungsten from four separate deposits have been mined there during the past seventy years.
Pennsylvanian Spores From The Sandia Formation Santa Fe County, New Mexico, Thomas L. Carten
Pennsylvanian Spores From The Sandia Formation Santa Fe County, New Mexico, Thomas L. Carten
Earth and Planetary Sciences ETDs
No abstract provided.
Petrology Of The Tijeras Greenstone, Bernallio County, New Mexico, John J. Bruns
Petrology Of The Tijeras Greenstone, Bernallio County, New Mexico, John J. Bruns
Earth and Planetary Sciences ETDs
The Precambrian metamorphosis rocks of the Tijeras Canyon area crop out along a five-mile, northeast-trending belt, which lies approximately five miles east of the Sandia Mountains front, in north-central New Mexico. The sequence, to the east, is overlain uncomfortably by Pennsylvanian Madera limestone, while the trace of the Tijeras fault marks the western side.
The Geology Of South Fork Thrust And Subsurface Geology Of The Belknap Ranch, Park County, Wyoming, James L. Deurmyer
The Geology Of South Fork Thrust And Subsurface Geology Of The Belknap Ranch, Park County, Wyoming, James L. Deurmyer
Earth and Planetary Sciences ETDs
The segment of the South Fork thrust in the Belknap ranch area contains rocks representative of the Upper Jurassic, Lower Cretaceous and Upper Cretaceous. The thrust plate occupies 75 percent of the mapped area. Approximately 3,500 feet of predominantly marine rocks comprise the detachment thrust and about 15 percent of the exposed rocks of the thrust plate is sandstone and conglomerate. All the rock units present in the thrust plate crop out beyond the edge of the over-riding mass except the Sundance and Morrison formations. Approximately 4,600 feet of geologic section is exposed of drilled in the mapped area. The …
Geologic And Ground-Water Reconnaissance Of The Loup River Drainage Basin Nebraska, R. T. Sniegocki, R. H. Langford
Geologic And Ground-Water Reconnaissance Of The Loup River Drainage Basin Nebraska, R. T. Sniegocki, R. H. Langford
United States Geological Survey: Publications
The Loup River and its tributaries drain an area of about 15,230 square miles in central Nebraska. The upper three-fifths of the drainage basin is in the Sand Hills region of Nebraska, and the lower two-fifths is in the loess plains and hills region. An eastward-thinning wedge of semiconsolidated and unconsolidated deposits of Tertiary and Quaternary age underlies the surficial dune sand and loess. These deposits, which are recharged by infiltrating precipitation, contain a tremendous volume of water at least 400 million acre-feet and annually discharge about 1.7 million acre-feet into streams. Although wells supply nearly all the water used …
The Jurassic Todilto Formation Of New Mexico, Henry O. Ash
The Jurassic Todilto Formation Of New Mexico, Henry O. Ash
Earth and Planetary Sciences ETDs
The Todilto formation of New Mexico is a widespread and distinctive Jurassic unit confined to the northern one-half of the State and adjacent parts of Arizona and Colorado. It consists of a lower Limestone member and an upper Gypsum member. The Gypsum member also contains some limestone. The two members are not coextensive in area. Both are present in the central part of the area in which the formation is found, but the Limestone member extends far beyond the limits of the Gypsum member.
The Environment Of The Jurassic Todilto Basin, Northwestern New Mexico, Douglas W. Kirkland
The Environment Of The Jurassic Todilto Basin, Northwestern New Mexico, Douglas W. Kirkland
Earth and Planetary Sciences ETDs
The Todilto evaporites of Upper Jurassic age were precipitated in a basin which covered more then 34,000 square miles of northwestern New Mexico and parts of Colorado and Arizona. The Todilto formation consists of a lower Limestone and an upper Gypsum member, and has a maximum thickness of a little more than 100 feet. Both members are varved.
Geology Of The Pedernal Hills Area Torrance County, New Mexico, John F. Fallis
Geology Of The Pedernal Hills Area Torrance County, New Mexico, John F. Fallis
Earth and Planetary Sciences ETDs
The area included in this report is in the north-central part of Torrance county, central New Mexico. The area is bounded on the north by U.S. Highway 66, on the east by U.S. Highway 285, on the south by U.S. Highway 60, and on the west by the approximate eastern edge of the Estancia basin. Clines Corners on U.S. Highway 66 forms the Northeast corner of the area. The mapped area contain approximately 230 square miles.
Geology Of The Hidden Mountains Valencia County, New Mexico, Patrick J.F. Gratton
Geology Of The Hidden Mountains Valencia County, New Mexico, Patrick J.F. Gratton
Earth and Planetary Sciences ETDs
The hidden mountains are located in Valencia County, New Mexico, immediately southwest of the point where New Mexico State Highway 6 and the Santa Fe Railroad cross the Rio Puerco. This location places the Hidden Mountains near the center of the west half of the Albuquerque-Belen basin of structural and geomorphic Rio Grande Depression.
Stratigraphy And Structure Of The French Mesa Area, Rio Arriba County, New Mexico, Francis L. Fitter
Stratigraphy And Structure Of The French Mesa Area, Rio Arriba County, New Mexico, Francis L. Fitter
Earth and Planetary Sciences ETDs
The French Mesa Area includes over 120 square miles between the Nacimiento- San Pedro uplift and the Gallina Mountain uplift in Rio Arriba County, New Mexico. The French Mesa anticline is the most striking structural and topographic feature of the area.
Maine Granite Quarries And Prospects, John R. Rand
Maine Granite Quarries And Prospects, John R. Rand
Maine Collection
Maine Granite Quarries and Prospects : Minerals Resources Index No.2
John R. Rand, State Geologist - Maine Geological Survey
Department of Economic Development, Augusta, Maine : May 1, 1958.
Contents: Introduction / Acknowledgements / Explanatory Considerations / Selected Bibliography / Granite Quarries and Prospects -- Alphabetical Index / Granite Quarries and Prospects -- Country-Township Index / Buildings and Structures Built of Maine Granites / Granite Quarries and Prospects-Map Index (missing).