17 research outputs found
Cenozoic sedimentation and paleotectonics of north-central New Mexico: implications for initiation and evolution of the Rio Grande rift
No full textThe Rio Grande rift is one of the major late Cenozoic continental rifts of the world, sharing most geophysical, geochemical, and geological characteristics with other rifts. Cenozoic evolution of the rift was synchronous with lithospheric plate interactions along and under the western North American margin: Paleocene-Eocene: Laramide primarily amagmatic compression related to flat-slab subduction; Oligocene: intermediate to silicic volcanism related to collapse of the slab; Miocene to present: rifting related to complex plate interactions overprinted on the previous history. Cenozoic paleogeographic and paleotectonic characteristics are consistent with a passive-mantle model of rifting. North-central New Mexico provides a unique opportunity to constrain models for rift initiation and evolution. It is one of the few locations within any rift where excellently exposed pre-rift and syn-rift basin fill has been studied thoroughly enough to allow detailed paleogeographic reconstruction for almost the entire Cenozoic. -from Author
Demand Analysis of Recreation Visits to Chitral Valley: A Natural Resource Management Perspective
No full textDemand Analysis of Recreation Visits to Chitral Valley: A Natural Resource Management Perspective
No full textRecreational visits are primarily about human activity which
involves travel from an originating area to a destination for cultural,
economic, and social exchange processes. People travel to exotic
locations for sight seeing, picnicking, bird watching, and for cultural
and religious settings. However, accessibility to such areas is often
free, which not only results in environmental hazards but also deprives
the cash destitute government from revenue that such these sites offer.
Valuing the recreational benefits associated with a destination based on
tourists’ preferences can help formulate an appropriate policy for
Natural Resource Management (NRM). Environmental and natural resource
management studies often try to measure the welfare change associated
with a policy change. Welfare is generally defined as area under the
demand curve; accordingly, by estimating the demand curve, consumer
surplus is obtained which shows the welfare changes associated with an
environmental policy change [Gunatilake (2003)]. The recreational values
thus obtained can be utilised for a cost benefit analysis of a policy
option, thereby, managing a park or a natural resource on a sustainable
basis
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Correlation of Some Mid-Mesozoic Redbeds and Quartz Sandstones in the Santa Rita Mountains, Mustang Mountains, and Canelo Hills, Southeastern Arizona
No full textMid-Mesozoic redbeds in the Santa Rita Mountains, Mustang Mountains, and Canelo Hills are lithologically and petrographically correlative. Quartz sandstone overlying the redbeds in the Mustang Mountains and Canelo Hills is also lithologically and petrographically correlative. The sediments were deposited during one or more breaks in volcanism associated with a continental magmatic arc that was active in southern Arizona during Triassic (?) and Jurassic time. The exact timing of sedimentation cannot be determined without more accurate dating of volcanics associated with the redbed strata. Redbeds of the Gardner Canyon Formation in the Santa Rita Mountains were probably deposited during and after eruption of the Mount Wrightson volcanics, the lower member of which is presently dated at 210 ±3 Ma. The Monkey Canyon redbeds and the Dark Canyon sandstone in the Canelo Hills and identical rocks in the Mustang Mountains are probably equivalent and were deposited between or during one or more hiatuses in two volcanic episodes presently dated at 165-185 Ma and 150-155 Ma, or before the 165-185 Ma volcanism and possibly as early as the period when the Gardner Canyon Formation was deposited. The Gardner Canyon Formation and Monkey Canyon redbeds are sequences of interbedded mudstone, siltstone, fine- to coarse-grained volcaniclastic sandstone, and volcanic conglomerate. They are interpreted as the product of meandering fluvial systems developed in close proximity to local volcanic sources, probably in distal alluvial fan or floodplain environments. The Dark Canyon and upper member Mount Wrightson quartz sandstones are bimodal, fine- and medium-grained, and average 93 percent monocrystalline quartz. They were probably deposited by both fluvial processes in stream channels and as windblown sand.Antevs LibraryThis item is part of the Geosciences Theses collection. It was digitized from a physical copy provided by the Antevs Library, Department of Geosciences, University of Arizona. For more information about items in this collection, please email the Antevs Library, [email protected]
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K-Ar dating of young volcanic rocks
No full textPotassium-Argon (K-Ar) age dates were determined for forty-two young geologic samples by the Laboratory of Isotope Geochemistry, Department of Geosciences, in the period February 1, 1986 to June 30, 1989. Under the terms of Department of Energy Grant No. FG07-86ID12622, The University of Arizona was to provide state-of-the-art K-Ar age dating services, including sample preparation, analytical procedures, and computations, for forty-two young geologic samples submitted by DOE geothermal researchers. We billed only for forty samples. Age dates were determined for geologic samples from five regions with geothermal potential: the Cascade Mountains (Oregon); the Cascade Mountains (Washington); Ascension Island, South Atlantic Ocean; Cerro Prieto, Mexico; and Las Azufres, Mexico. The ages determined varied from 5.92 m.a. to 0.62 m.a. The integration of K-Ar dates with geologic data and the interpretation in terms of geologic and geothermal significance has been reported separately by the various DOE geothermal researchers. Table 1 presents a detailed listing of all samples dated, general sample location, researcher, researcher's organization, rock type, age, and probable error (1 standard deviation). Additional details regarding the geologic samples may be obtained from the respective geothermal researcher. 1 tab
Characterization of Bacterial Pathogens and Their Antimicrobial Susceptibility Profile, from Inanimate Surfaces in Tertiary Care Hospital Peshawar, Pakistan
No full textAim: To isolate, identify and antimicrobial susceptibility profile of the bacterial pathogens from inanimate surfaces of hospital which contributes to hospital acquired infections.
Methods: A total of 80 samples, including 20 from each unit (surgical ward, Medical ward, ICU and Operation Theater) were aseptically collected from different surfaces. Isolation and identification were made on the basis of different bacteriological media and biochemical tests. API 10 S (Biomerieux France) kits were used for the identification of gram negative bacteria. Antimicrobials susceptibility was performed according to Kirby-Bauer disc diffusion method.
Findings: Over all prevalence of culture positive samples were (75%) from which 9 different bacterial strains were isolated. The prevalence of Staphylococcus aureus is (68%), Staphylococcus epidermidis (28%), Streptococcus agalactaie (1.6%), Enterococcus faecalis (1.6%), Escherichia coli (3.3%), Pseudomonas aeruginosa (1.6%), Enterobacter aerogenes (1.6%) Serratia marcescens (1.6%). Prevalence rate of MRSA was 21.8%. 50% of Gram negative isolates were resistant to Cefotaxime, 50% to Meropenem, 40% to Amoxicillin, 40% Nitrofurantoin, 50% to Polymyxin B. 100% of the gram negative isolates were sensitive to Fosfomycin and Ciprofloxacin.
Conclusion: The hospital inanimate surfaces are heavily contaminated with resistant pathogenic bacteria which can be a potential source of hospital acquired infections. Attention is required for proper decontamination method to avoid the possible dissemination to the patients and hospital staff
An Analysis of Lexical and Semantic Rhetorical Figures in the Ghazals of Wasil Kabuli
No full textMirza Muhammad Nabi Wasil Kabuli, one of the great Persian literature poets of Afghanistan, flourished in the late 17th century and ignited the lamp of poetry and literature in his time. He composed very beautiful, attractive, and lively poetry. Both lexical and conceptual rhetorical devices can be found quite extensively in his ghazals. However, his work has not been viewed from this perspective until now. Thus, The general aim of this research is to study thirty selected ghazals of Wasil's Divan in systematic observation of lexical and conceptual rhetorical devices, so that readers become familiar with the elements of his poetry, elements of his verse, and his literary persona. This study is a theoretical study carried out on the library research and analytical-descriptive research method. The subject of our research is Divan of Wasil Kabuli, and the statistical sample of this research consists of thirty ghazals from his Divan of ghazals. The lexical rhetorical device, i.e., parallelism, alliteration, various types of repetition, and balance, and the conceptual rhetorical device, i.e., proportion, contrast, ambiguity, paradox, allusion, synesthesia, conjunction and division, chiasmus, and coordination of qualities, all recur very often in Wasil Kabuli's ghazals and make a contribution to the literary merit of the text along with the potency and joy of the poet's statement
Implications of paleomagnetic data on Miocene extension near a major accommodation zone in the Basin and Range Province, northwestern Arizona and southern Nevada
No full textGeochronologic contributions to the tertiary sedimentary-volcanic sequences ("baucarit formation") in sonora, México
No full textFechamientos radiométricos por el método K-Ar, en flujos de rocas volcánicas intercaladas y suprayacientes a conglomerados volcanogénicos y areniscas de origen continental en Sonora, México, arrojan edades comprendidas entre 33 y 5 m.a. Entre éstas, las rocas volcánicas asociadas con conglomerados y areniscas conocidos como "Formación Baucarit" varían en edad desde los 23 a los 10 m.a. Los estratos del Oligoceno-Mioceno medio contienen flujos de rocas volcánicas de composición basáltica, andesítica y andesítico-riolítica. Un pulso de magmatissmo silísico a nivel regional ocurrió entre 14 y 10 m.a. Las secuencias del Mioceno superior hasta el Pleistoceno se asocian fundamentalmente con vulcanismo basáltico. El proceso de extensión de la corteza es posterior a la deformación Larámide y posiblemente se inició en Sonora en el Eoceno tardío (?), seguido por la acumulación de conglomerados sintectónicos y flujos volcánicos del Oligoceno (33 a 24 m.a.). Este proceso fue puramente continuo a través del Terciario; no obstante, un período corto de deformación estructural distensiva ocurrió entre los 10 y 9 m.a. Este evento tectónico puede ser el responsable de la fisiografía actual de la Sierra Madre Occidental ('Provincia de Sierras y Valles Paralelos") en Sonora, México
