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Uplift andactive deformation of the Pastaza alluvial fan, subandean zone of Ecuador
| Content Provider | Semantic Scholar |
|---|---|
| Author | Berc, Séverine Bès De Baby, Patrice Soula, Jean-Claude Souris, Marc Rosero, Jaime A. |
| Copyright Year | 2002 |
| Abstract | The Pastaza megafan constitutes the largest humid tropical fan in the world (Rasanen et al., 1992). The apex of this megafan is situated between the Ecuadorian Subandean domes of Cutucu and Napo at the outlet of the Rio Pastaza (Fig. 1), whose catchment is situated in the Interandean depression. Actually, the Rio Pastaza runs across the Cordillera Oriental before debouching into the megafan. It drains the flanks of the Ecuadorian stratovolcanoes Cotopaxi, Sangay, Tungurahua, Altar, Chimborazo and Carihuairazo, and continues to receive massive amounts of volcanoclastic debris (Hall, 1977). The Pastaza megafan is made up ofMiocene to Pleistocene deposits (Chambira Fm.), including the late Pleistocene Mera Formation (Tschopp, 1953) mainly composed of catastrophic volcanoclastic (andesitic) debris flows from the Tungurahua volcano, interfering with pure fluvial sedimentation. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://horizon.documentation.ird.fr/exl-doc/pleins_textes/divers16-05/010047921.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
