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Geologica acta

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Geologica acta 8 records found  Search took 0.01 seconds. 
1.
18 p, 3.6 MB Increasing size and abundance of microbialites (oncoids) in connection with the K/T boundary in non-marine environments in the South Central Pyrenees / Astibia Ayerra, Humberto (Universidad del País Vasco. Departamento de Estratigrafía y Paleontología) ; López-Martínez, N. (Universidad Complutense de Madrid. Departamento de Paleontología) ; Elorza, J. (Universidad del País Vasco. Departamento de Mineralogía y Petrología) ; Vicens, Enric (Universitat Autònoma de Barcelona. Departament de Geologia)
A layer rich in giant microbialites, developed within continental deposits of the Tremp Formation (South-Central Pyrenees) in the aftermath of the end-Cretaceous mass extinctions, is here reported for the first time. [...]
2012 - 10.1344/105.000001670
Geologica acta, Vol. 10, Núm. 3 (Setembre 2012) , p. 209-226  
Detailed record - Creative Commons
2.
12 p, 5.7 MB Multicostate zeillerids (Brachiopoda, Terebratulida) from the Lower Jurassic of the Eastern Subbetic (SE Spain) and their use in correlation and paleobiogeography / Baeza-Carratalá, J. F. (Universitat d'Alacant. Departament de Ciències de la Terra i del Medi Ambient) ; García Joral, F. (Universidad Complutense de Madrid. Facultad de Ciencias Geológicas)
The Lower Jurassic multicostate zeillerids of the Subbetic Domain are described here for the first time. A new species (Fimbriothyris? dubari) is erected, and the affinities of the remaining three species are discussed. [...]
2012 - 10.1344/105.000001699
Geologica acta, Vol. 10, Núm. 3 (Setembre 2012) , p. 227-238  
Detailed record - Creative Commons
3.
13 p, 4.0 MB Trace element analyses indicative of paleodiets in Middle Miocene mammals from the Somosaguas site (Madrid, Spain) / Doming, L. (University of California. Earth and Planetary Sciences Department) ; López-Martínez, N. (Universidad Complutense de Madrid. Departamento de Paleontología) ; Grimes, S. T. (University of Plymouth. School of Geography, Earth and Environmental Sciences) ; Consejo Superior de Investigaciones Científicas (Espanya). Instituto de Geología Económica ; Consejo Superior de Investigaciones Científicas (Espanya) ; Unidad de Investigación de Paleontología
Trace element analysis of fossil bone and enamel constitutes a useful tool to characterize the paleoecological behavior of mammals. Up to now, most trace element studies have focused on Plio-Pleistocene fossils. [...]
2012 - 10.1344/105.000001746
Geologica acta, Vol. 10, Núm. 3 (Setembre 2012) , p. 239-247  
Detailed record - Creative Commons
4.
18 p, 7.6 MB Arc-parallel vs back-arc extension in the Western Gibraltar arc : is the Gibraltar forearc still active? / Balanyá, J. C. (Universidad Pablo de Olavide. Departamento de Sistemas Físicos, Químicos y Naturales) ; Crespo-Blanc, A. (Instituto Andaluz de Ciencias de la Tierra) ; Díaz-Azpiroz, M. (Universidad Pablo de Olavide. Departamento de Sistemas Físicos, Químicos y Naturales) ; Expósito, I. (Universidad Pablo de Olavide. Departamento de Sistemas Físicos, Químicos y Naturales) ; Torcal, F. (Instituto Andaluz de Geofísica y Prevención de Desastres Sísmicos) ; Pérez-Peña, José Vicente (Universidad de Granada. Departamento de Geodinámica) ; Booth-Rea, G. (Universidad de Granada. Departamento de Geodinámica)
Extremely tight arcs, framed within the Eurasia-Africa convergence region, developed during the Neogene on both sides of the western Mediterranean. A complex interplate deformation zone has been invoked to explain their structural trend-line patterns, the shortening directions and the development of back-arc basins. [...]
2012 - 10.1344/105.000001771
Geologica acta, Vol. 10, Núm. 3 (setembre 2012) , p. 249-263  
Detailed record - Creative Commons
5.
18 p, 6.1 MB Structure of the Southern Patagonian Andes at 49ºS, Argentina / Giacosa, R. (Servicio Geológico Minero Argentino (SEGEMAR)) ; Fracchia, D. (Comisión Nacional Energía Atómica (CNEA)) ; Heredia, Nemesio (Instituto Geológico y Minero de España) ; Universidad Nacional de la Patagonia. Departamento de Geología
This paper describes Late Paleozoic Gondwanan and Late Cretaceous to Early Cenozoic Andean structures in the Southern Patagonian Andes and an associated Extra-Andean region between lakes San Martín and Viedma. [...]
2012 - 10.1344/105.000001749
Geologica acta, Vol. 10, Núm. 3 (setembre 2012) , p. 265-282  
Detailed record - Creative Commons
6.
13 p, 1.0 MB Provenance, tectonic setting and source-area weathering of Mesoproterozoic Kaimur Group, Vindhyan Supergroup, Central India / Mishra, M. (Indira Gandhi National Open University. Presently at School of Sciences) ; Sen, S. (Banaras Hindu University. Department of Geology)
The siliciclastic of the Upper Kaimur Group of the Vindhyan Supergroup in Central India have been geochemically studied in order to understand their provenance, paleoweathering conditions and tectonic conditions. [...]
2012 - 10.1344/105.000001759
Geologica acta, Vol. 10, Núm. 3 (setembre 2012) , p. 283-293  
Detailed record - Creative Commons
7.
14 p, 1.9 MB Seamounts : characteristics, formation, mineral deposits and biodiversity / Iyer, S. D. (National Institute of Oceanography (Council of Scientific & Industrial Research)) ; Mehta, C. M. (Oil and Natural Gas Comissions) ; Das, P. (National Institute of Oceanography (Council of Scientific & Industrial Research)) ; Kalangutkar, N. G. (National Institute of Oceanography (Council of Scientific & Industrial Research))
Seamounts represent crust-mantle activities and are areas of petrological deviations, biodiversity, seismicity and hydrothermal events. An estimated ~50 million tons/year of basalts are required to produce seamounts suggesting intense oceanic volcanism. [...]
2012 - 10.1344/105.000001758
Geologica acta, Vol. 10, Núm. 3 (setembre 2012) , p. 295-308  
Detailed record - Creative Commons
8.
10 p, 1.0 MB Spatial variation of coda wave attenuation in the Southern Indian Shield and its implications / Singh, Chandrani (Indian Institute of Technology. Department of Geology and Geophysics) ; Basha, S. K. (National Geophysical Research Institute) ; Shekar, M. (National Geophysical Research Institute) ; Chadha, R. K. (National Geophysical Research Institute)
During the recent past the Indian peninsular shield has experienced six damaging earthquakes of M 5. 4-7. 7 and compelled to readdress our understanding of the seismic attenuation characteristics for better evaluation of the seismic hazards in the so-called stable shield. [...]
2012 - 10.1344/105.000001751
Geologica acta, Vol. 10, Núm. 3 (setembre 2012) , p. 309-318  
Detailed record - Creative Commons

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