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Registros recuperados: 18 | |
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Martillo, C.; Moreira, L.; Pazmiño, A.; Chunga, K.; Rosero, J.; Calderón, M.; Romero, A.. |
La Isla Santa Clara se encuentra ubicada a la entrada de Guayaquil, es un Humedal de Importancia Internacional en el Marco de la Convención RAMSAR, habiendo sido declarada como sitio RAMSAR N° 1142, el 2 de febrero del 2002. En ella se encuentra construída la estación científica CPFG Héctor Chiriboga Guerra, donde se toman datos oceanográficos y meteorológicos. La Isla Santa Clara tiene un origen tectónico, pues es producto de un esfuerzo comprensivo del Pleistoceno Superior, ocasionado por el sistema de fallas transcurrentes Caracas-Guayaquil. Debido a procesos geológicos y ambientales, la Isla Santa Clara ha sufrido una erosión muy acelerada calculado en 1’824.710m3 entre los años 1980 a 2000, alrededor de toda la isla, y de 80,000m3 alrededor del sector... |
Tipo: Journal Contribution |
Palavras-chave: Morphometry; Tectonics; Global positioning systems; Islands; Tectonics; Global positioning systems; Islands; Http://aims.fao.org/aos/agrovoc/c_31904; Http://aims.fao.org/aos/agrovoc/c_36733; Http://aims.fao.org/aos/agrovoc/c_3962. |
Ano: 2009 |
URL: http://hdl.handle.net/1834/3371 |
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Rossetti,Dilce F.; Góes,Ana M.; Bezerra,Francisco H.R.; Valeriano,Márcio M.; Brito-Neves,Benjamim B.; Ochoa,Felipe L.. |
Several publications have contributed to improve the stratigraphy of the Paraíba Basin in northeastern Brazil. However, the characterization and distribution of sedimentary units in onshore areas of this basin are still incomplete, despite their significance for reconstructing the tectono-sedimentary evolution of the South American passive margin. This work provides new information to differentiate among lithologically similar strata, otherwise entirely unrelated in time. This approach included morphological, sedimentological and stratigraphic descriptions based on surface and sub-surface data integrated with remote sensing, optically stimulated luminescence dating, U+Th/He dating of weathered goethite, and heavy mineral analysis. Based on this study, it... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Morphology; Sedimentology; Stratigraphy; Chronology; Tectonics; Paraíba Basin. |
Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652012000200007 |
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Leroux, Estelle; Counts, J.; Jorry, Stephan; Jouet, Gwenael; Révillon, Sidonie; Boudagher-fadel, M.k.; Courgeon, S.; Berthod, C.; Ruffet, G.; Bachèlery, P.; Grenard-grand, E.. |
Little is known about the geological history of the Glorieuses seamount including basic information about its age and origin related to the regional evolution of the southern tip of the Somali Basin. This study focused on describing and reconstructing the long-term stratigraphic evolution of the Glorieuses seamount (SW Indian Ocean) to identify the mechanisms that have occurred through time to finally shape the emerged modern islands. Distinct terrace levels, currently submerged along the flanks of the seamount and surrounding seamounts, have already been interpreted as resulting from successive carbonate development and back-stepping episodes over the last 62 Myr. New isotopic and biostratigraphic dating on the flanks of the seamount, coupled with... |
Tipo: Text |
Palavras-chave: Glorieuses seamount; Somali Basin; Seismic stratigraphy; Tectonics; Vertical movement (uplift and subsidence); Volcanism; Shallow-water carbonate platform; Ar-40/Ar-39. |
Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00628/73965/73324.pdf |
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Ramkumar, Mu; Siddiqui, Numair Ahmed; Mathew, Manoj; Sautter, Benjamin; Hui, Poon Xin; Nagarajan, R.; Breitfeld, H. Tim; Santosh, M.; Menier, David; Poppelreiter, Michael. |
In the eastern side of the Malay Peninsula, thick successions of limestone formations preserve important records of the Mesozoic and Cenozoic tectonic events. Here we investigate the strata- and fracture-bound hydrothermal dolomites in the Palaeozoic carbonates of the Kinta Valley, western Peninsular Malaysia. Based on their textural and morphologic characteristics, structural relationships with the host rock, different facies types, and associations with hydrothermal calcite and low-grade metamorphic marble, we attempt to trace their polyphase origin and relationship with thereto-tectonic events of the region. A detailed evaluation of the nature of brecciation and crystallization of polyphase dolomites, dolomitic limestones, limestones and marble, under... |
Tipo: Text |
Palavras-chave: Hydrothermal dolomite; Tectonics; Magmatism; Paragenesis; Structural evolution; Malaysia. |
Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00637/74938/83485.pdf |
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Dupre, Stephanie; Scalabrin, Carla; Grall, Celine; Augustin, Jean-marie; Henry, Pierre; Sengor, A. M. Celal; Goeruer, Naci; Cagatay, M. Namik; Geli, Louis. |
Understanding of the evolution of fluid-fault interactions during earthquake cycles is a challenge that acoustic gas emission studies can contribute. A survey of the Sea of Marmara using a shipborne, multibeam echo sounder, with water column records, provided an accurate spatial distribution of offshore seeps. Gas emissions are spatially controlled by a combination of factors, including fault and fracture networks in connection to the Main Marmara Fault system and inherited faults, the nature and thickness of sediments (e.g., occurrence of impermeable or gas-bearing sediments and landslides), and the connectivity between the seafloor and gas sources, particularly in relation to the Eocene Thrace Basin. The relationship between seepage and fault activity is... |
Tipo: Text |
Palavras-chave: Fluid emissions; Gas; Water column acoustics; Multibeam echo sounder; Sea of Marmara; Tectonics. |
Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00268/37972/36049.pdf |
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Ribeiro,Alexandre Cunha. |
The eastern Brazilian coastal drainages are of great biogeographical significance, because of their highly endemic fish faunas. Phylogenetic patterns suggest a close biotic relationship between the rivers that flow into the Atlantic and those on the adjacent upland crystalline shield. However, little has been said on the dynamics of the geological processes causally related to the cladogenetic events between these areas. Distributional and phylogenetic patterns suggest a close association with the geological history of the passive continental margin of South America, from the Cretaceous to the present day. In this area megadome uplifts, rifting, vertical movements between rifted blocks and the erosive retreat of the South American eastern continental... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fishes; Distributional Patterns; Passive Margin; South America; Tectonics. |
Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252006000200009 |
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Gomez, O; Briais, Anne; Sauter, D; Mendel, V. |
We present the analysis of the deformation in the axial valley of two contrasted regions of the very slow spreading Southwest Indian Ridge based on side-scan sonar images. Our objective is to investigate how the obliquity is accommodated along the system. We show that the robust magmatic segments have axial valleys and major faults subperpendicular to spreading. The other sections show fault populations with various degrees of obliquity, often arranged in left-stepping echelons, accommodating part of the strike-slip deformation. Side-scan sonar reveals the presence of a corrugated surface near 59 degrees E interpreted to be an incipient detachment fault. We show that the large width of the SWIR oblique sections, and the difference in tectonic style between... |
Tipo: Text |
Palavras-chave: Mid-ocean ridges; Side-scan sonar; Tectonics; Discontinuities. |
Ano: 2006 |
URL: https://archimer.ifremer.fr/doc/00234/34567/33236.pdf |
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Donovan, S.K.; Pickerill, R.K.. |
James speculated that Paleogene ‘flysch-wildflysch’ deposits of the Caribbean region may all have a related genesis associated with one or more bolide impacts. The principal arguments used to promote this idea were: (1) that many successions may have been dated incorrectly and are actually related to the end Cretaceous (K/T) event and/or other bolide impacts; and (2) common olistostromes may have been transported by impact-related phenomena. The deposits discussed by James included the Richmond and Font Hill formations of Jamaica. The Richmond Formation of the Wagwater Belt is Paleogene, not Cretaceous, and olistostromic blocks are a common feature of the sedimentary succession of Jamaica. No extraterrestrial event need be invoked to support their... |
Tipo: Article / Letter to the editor |
Palavras-chave: Jamaica; Paleogene; Richmond Formation; Tectonics; K/T event; 38.10. |
Ano: 2009 |
URL: http://www.repository.naturalis.nl/record/314209 |
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Registros recuperados: 18 | |
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