| dc.creator | Le Roux,Jacobus P | |
| dc.creator | Puratich,Jacqueline | |
| dc.creator | Mourgues,F. Amaro | |
| dc.creator | Oyarzún,José Luis | |
| dc.creator | Otero,Rodrigo A | |
| dc.creator | Torres,Teresa | |
| dc.creator | Hervé,Francisco | |
| dc.date | 2010-07-01 | |
| dc.date.accessioned | 2017-03-07T16:27:25Z | |
| dc.date.available | 2017-03-07T16:27:25Z | |
| dc.identifier | http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-71062010000200004 | |
| dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/401916 | |
| dc.description | Very little work has been done on the stratigraphy and sedimentology of the upper Oligocene-Lower Miocene Río Baguales Formation in the Magallanes Province of southern Chile since its original definition in 1957. A detailed stratigraphic section of the upper part of the formation exposed west of the Baguales River is presented, with an interpretation of depositional environments. This indicates a prograding shoreline in which estuary mouth, middle estuary (lagoon) and bay head delta facies are represented. Large-scale delta slope foresets indicate progradation towards the north and northwest, whereas southeast-directed cross-beds on the delta front probably suggest wave action. The general sequence reflects a gradual sea-level fall largely counteracted by tectonic subsidence, which provided the ne-cessary accommodation space for thick tidal flat and subtidal deposits to accumulate. A longer period of transgression towards the top of the succession may be related to a rise in sea-level or accelerated tectonic subsidence, whereas a major regression commencing at around 23.3 Ma probably coincides with the opening of the Drake Passage and the growth of the East Antarctic Ice Sheet. | |
| dc.format | text/html | |
| dc.language | en | |
| dc.publisher | Servicio Nacional de Geología y Minería (SERNAGEOMIN) | |
| dc.source | Andean geology v.37 n.2 2010 | |
| dc.subject | Estuary | |
| dc.subject | Gilbert-type delta | |
| dc.subject | Oligocene-Miocene sea-level changes | |
| dc.subject | Polykladichnus | |
| dc.title | Estuary deposits in the Río Baguales Formation (Chattian-Aquitanean), Magallanes Province, Chile | |
| dc.type | Artículos de revistas | |
