Now showing items 244-263 of 373

    • Paleontological study of the echinoderms in the qom formation (central iran) 

      Khaksar, Keyvan; Moghadam, Iraj Maghfouri
      The Qom formation was formed in the Oligo-Miocene during the final sea transgression in Central Iran (Figure 1). The best outcrop is located in the vicinities of the Qom City, approximately 130km at the south of Tehran. ...
      Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. 
    • Perfil altitudinal de la temperatura media del aire en Colombia 

      Eslava, Jesus
      Se establecen ecuaciones que relacionan la temperatura media anual del aire enColombia con la altitud. Por medio de ellas se posibilita estimar los valores de esa temperatura en cualquier lugar, con el requisito de conocer ...
      Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. 
    • Performance of Single Base RTK GNSS Method versus Network RTK 

      Aykut, Nedim Onur; Gülal, Engin; Akpinar, Burak
      After the late 1990s, GNSS/GPS network RTK technology has become the preferred technique in the world, today widely used in various applications such as monitoring, early warning systems, and mapping and engineering ...
      Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. 
    • Petrogenesis of the metacarbonate and related rocks of the silgará formation, central santander massif, colombian andes: an overview of a “reaction calcic exoscarn” 

      Ríos, C.A.; Castellanos, O.M; Gómez, S.I.; Ávila, G.A.
      Metacarbonate rocks (pure and impure marbles, carbonate-silicate rocks, calc-silicate rocks and carbonate-bearing silicate rocks) form a very complex group within the metamorphic sequence of the Silgará Formation at the ...
      Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. 
    • Petrographical study of ewekoro carbonate rocks, in ibese, south western nigeria 

      Akinmosin, A.; Osinowo, O.O.
      Limestone deposits can be found in every system of the geologic column since the Precambrian. In classifying this rock, various attempts have been made and notable among them is the classification scheme based on three ...
      Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. 
    • Petrography and application of the rietveld method to the quantitative analysis of phases of natural clinker generated by coal spontaneous combustion 

      Henao M, José Antonio; Carreño, Angélica María; Quintero D, John Alexander; Candela H, Sol Ángel; Ríos R, Carlos Alberto; Ramos G, Miguel A.; Pinilla A., Jesús Andelfo
      Fine-grained and mainly reddish color, compact and slightly breccious and vesicular pyrometamorphic rocks (natural clinker) are associated to the spontaneous combustion of coal seams of the Cerrejón Formation exploited by ...
      Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. 
    • Petrologic significance of Fe-rich staurolite in pelitic schists of the Silgará Formation, Santander Massif 

      Ríos, Carlos Alberto; Castellanos, Óscar Mauricio
      Medium grade metapelites of the Silgará Formation at the Santander Massif (Colombian Andes) have been affected by a medium-pressure/high-temperature Barrovian type of metamorphism, developing a sequence of metamorphic zones ...
      Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. 
    • Petrology and mineralogy of the Fenghuanshan granodiorite, Anhui Province, China: implications for petrogenesis and metallogenesis implication 

      Aiping, Zhang; Du, Yangsong; Cao, Yi; Pang, Zhenshan; Luo, Gan; Xu, Kangkang
      The Fenghuangshan copper deposit, in the Tongling area of Anhui Province, China, is genetically associated with the Fenghuangshan granodiorite, which contains amphiboles that can be used to determine the pressure and ...
      Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. 
    • Petrophysical properties of the Lower Cretaceous formations in the Shaikhan oilfield, northern Iraq 

      Jabbar, Wria Jihad; Naqshabandi, Srood Farooq; Al-Juboury, Falah Khalaf
      The current study represents an evaluation of the petrophysical properties in the well Shaikhan-8 for the Garagu, Sarmord and Qamchuqa formations in Shaikhan oilfield, Duhok basin, northern Iraq. The petrophysical evaluation ...
      Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. 
    • PNN-based Rockburst Prediction Model and Its Applications 

      Zhou, Yu; Wang, Tingling
      Rock burst is one of main engineering geological problems significantly threatening the safety of construction. Prediction of rock burst is always an important issue concerning the safety of workers and equipment in tunnels. ...
      Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. 
    • Possible rapid strain accumulation rates near cali, colombia, determined from gps measurements (1996-2003) 

      Trenkamp, Robert; Mora P, Héctor; Salcedo H, Elkin; Kellogg, James N.
      Global Positioning System (GPS) data from southern Central America and northwestern South America collected between 1991 and 1998 reveal wide plate margin deformation along a 1400 km length of the North Andes. Also associated ...
      Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. 
    • Los potenciales espontáneos: aspectos básicos y sus aplicaciones 

      Briseño G., Luis A.; León, Robinson
      Los potenciales generados espontáneamente en un medio, SP, se han observado en suelos infrayacidos por arcillas y por areniscas. En cada uno de los casos se miden su dependencia temporal y se establecen rangos de valores: ...
      Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. 
    • Potential littoral sediment transport along the coast of south eastern coast of india 

      Saravanan, S.; Chandrasekar, N.
      In the nearshore zone of present study area, the movement of sand alongshore is due to the action of waves and currents. The sediment movement along the shoreline of study area is mainly governed by the forces associated ...
      Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. 
    • Potential Settlement Due to Seismic Effects in the Residential Area of Ilgin (Konya, Turkey) 

      Ozdemir, Adnan; Nalbantcilar, Mahmut Tahir
      Ilgin lies on newly formed, loose, granular deposits, and there is a substantial risk for surface liquefaction and foundation settlements due to the seismic effects resulting from groundwater close to the surface. This ...
      Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. 
    • Prediction of Hub Height Winds over the Plateau Terrain by using WRF /YSU/Noah and Statistical Forecast 

      Deng, Hua; Li, Yan; Zhang, Yingchao; Zhou, Hou; Cheng, Peipei; Wang, Jia; Ashraf, Muhammad Aqeel
      The forecast of wind energy is closely linked to the prediction of the variation of winds over very short time intervals. Four wind towers located in the Inner Mongolia were selected to understand wind power resources in ...
      Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. 
    • Preliminares 

      Geofísica, Colombiana
      Páginas preliminares con información sobre el comité editorial y tabla de contenido
      Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. 
    • Preliminares 

      Geofísica, Colombiana
      Páginas preliminares con información sobre el comité editorial y la tabla de contenido
      Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. 
    • Preliminares 

      Geofísica, Colombiana
      Páginas preliminares con información sobre el comité editorial y la nota de la editorial
      Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. 
    • Preliminares 

      Geofísica, Colombiana
      Páginas preliminares con informacióbre el comité editorial y la tabla de contenido
      Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. 
    • Preliminares 

      Geofísica, Colombiana
      Páginas preliminares con información sobre comité editorial, tabla de contenido y nota de presentación
      Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal.