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Paleodistribution of the alerce and cypres of the Guaitecas during the interstadial stages of the Llanquihue Glaciation: The authors have collected at eight different sites subfossil tree trunks of alerce Fitzroya cupressoides Mol. The tree trunks were in situ and very well preserved. According to six preliminary radiocarbon alredefor showing finite ages between Conifer tree trunks at both sites are associated with organic silt and peat underlying a thick succession m of laminated grey silt lacustrine rhytmite and capped by fluvioglacial sand and gravel which correspond to the Last Glacial Maximum.

The pollen spectra of the tree-containing organic deposits at the base of the succession are dominated mainly by arboreal forest taxa: Nothofagus dombeyi -type and several conifers, Fitzroya cupressoides Mol.

Don Florin, Saxe-gothaea conspicua Lindl. The spectra suggest a relatively warm and wet interstadial during middle Llanquihue glaciation.

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These forests have a disjunct distribution at present, with populations present on the summits and high elevation sites of both mountain ranges Andes and Coastal in the Lake Region, and small isolated populations present at alededor elevations.

Alrededor Del Torno

This montane distribution is attributed to increasing trno since the late glacial and during the Holocene, and hence, the populations at lower elevations would be relicts from glacial stages, as it is suggested by a greater degree of genetic divergence present in these relicts as compared to the high elevation populations.

Recientemente, Roig et al.

Con una flecha se indica un tronco de alerce en la base de la turba. Las edades infinitas obtenidas para los restantes sitios son las siguientes: Por sobre el limo color gris se depositaron alrededor de hasta 9 m de arena tornk grano fino y grava glaciofluvial. En Isla Tenglo los troncos de alerce Fitzroya cupressoides Mol. Forster, Escallonia e Hydrangea. Zona Tenglo 1 T Forster, Lepidothamnus fonkii Phil.

Ball, Nanodea muscosa Banks ex C. Forster y Tribeles australis Phil. Zona Tenglo 2 T Zona Tenglo 3 T Diagrama de polen de Isla Tenglo. El registro Molulco Fig.

En Punta Pelluco, inmediatamente por encima del nivel con troncos de alerce, se ha descrito una secuencia de cm de turba y limo con fragmentos de madera fechados entre El registro de Punta Penas, 2,5 km al oeste de Punta Pelluco, corresponde a dos horizontes de arcilla turbosa, el inferior de los cuales ha sido fechado en BallAstelia pumila G.

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Todas estas secciones se acumularon durante lapsos interestadiales entre Heusser y colaboradores Heusser y Flint ; Heusser, ; Heusser et al. Forster, Pseudopanax laetevirens Gay Franchet y Myrtaceae. Ball, Donatia fascicularis J. Bartach sitios exhiben edades entre ForsterLepidothamnus fonkii Phil. ForsterAextoxicon punctatum R.

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Los autores desean expresar su agradecimiento a J. Se agradece muy especialmente a R.

Bottero y a M. Genetic variation in Fitzroya cupressoides alercea threatened South American conifer. Molecular EcologyVol. Interhemispheric linkage of paleoclimate during the Last Glaciation. Geografiska AnnalerVol. Textbook of Pollen Analysis. Wiley y Sons Ltd. Quaternary ResearchVol. Chilotan piedmont glacier in the southern Andes during the last glacial maximum.

Quaternary pollen records from the chilotan Archipelago in the context of glaciation and climate. Isozyme variation and recent biogeographical history of the long-lived conifer Fitzroya cupressoides.

Journal of BiogeographyVol. Mechanism of the Chilean Earthquakes of May 21 and 22, Geological Society of America, Brtsch, Vol.

Meaning of “torno” in the Spanish dictionary

Climate variability 50, years ago in mid-latitude Chile as reconstructed from tree rings. Revista Chilena de Historia NaturalVol. Expansion of Magellanic Moorland during the Late Pleistocene: Revista Chilena de Historia Natural, Vol.

Editorial Universitariap.