Pre-Quaternary Glaciations

2021 ◽  
pp. 475-485
Author(s):  
Mario Luis Assine ◽  
Lucas Verissimo Warren
Keyword(s):  
Quaternary Glaciations

scholarly journals Quaternary Glaciations in the Andes of North-Central Chile

1975 ◽  
Vol 14 (70) ◽  
pp. 155-170 ◽  
Author(s):  
Cesar N. Caviedes ◽  
Roland Paskoff
Keyword(s):  
Polar Front ◽  
Southern Andes ◽  
North Central ◽  
Central Chile ◽  
The Andes ◽  
Semi Arid ◽  
Quaternary Glaciations ◽  
Chilean Andes

The extension of the Quaternary glaciations has been studied in the semi-arid Andes of north-central Chile, where the glacial modelling is striking. In the Elqui valley (lat. 30°S.), two glacial advances were identified reaching down to 3 100 m (Laguna glaciation) and 2 500 m (Tapado glaciation). In the Aconcagua valley (lat. 33°S.), moraines from three major glacial advances were found, at 2 800 m (Portillo glaciation), 1 600 m (Guardia Vieja glaciation) and 1 300 m (Salto del Soldado glaciation).The Quaternary glaciations were linked with a decrease of temperature, but more significantly with a marked increase of precipitation probably related to an equatorward shift of 5–6 degrees of the austral polar front. The results obtained in the semi-arid Chilean Andes are correlated with those recently reported from other sectors of the southern Andes.

Late Quaternary glaciations in Turkey

2012 ◽  
Vol 279-280 ◽  
pp. 427
Author(s):  
Mehmet Akif Sarikaya
Keyword(s):  
Late Quaternary ◽  
Quaternary Glaciations

On Quaternary glaciations, observations and theories

2015 ◽  
Vol 120 ◽  
pp. 128-132 ◽  
Author(s):  
D. Paillard
Keyword(s):  
Quaternary Glaciations

Northern Glacial Chronology: Quaternary Glaciations in the Northern Hemisphere.

Science ◽  
1987 ◽  
Vol 236 (4808) ◽  
pp. 1581-1582
Author(s):  
H. E. WRIGHT
Keyword(s):  
Northern Hemisphere ◽  
Glacial Chronology ◽  
Quaternary Glaciations

Quaternary glaciations in the Lopu Kangri area, central Gangdise Mountains, southern Tibetan Plateau

2018 ◽  
Vol 201 ◽  
pp. 470-482 ◽  
Author(s):  
Qian Zhang ◽  
Chaolu Yi ◽  
Guocheng Dong ◽  
Ping Fu ◽  
Ninglian Wang ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Southern Tibetan Plateau ◽  
Quaternary Glaciations

scholarly journals A glacial survivor of the alpine Mediterranean region: phylogenetic and phylogeographic insights into Silene ciliata Pourr. (Caryophyllaceae)

2015 ◽  
Author(s):  
Ifigeneia Kyrkou ◽  
José María Iriondo ◽  
Alfredo García-Fernández
Keyword(s):  
Plastid Dna ◽  
Balkan Peninsula ◽  
Disjunct Distribution ◽  
Species Dispersal ◽  
Dna Evidence ◽  
Phylogenetic Origin ◽  
The Alps ◽  
The Mediterranean ◽  
Quaternary Glaciations ◽  
The Mediterranean Basin

Silene ciliata Pourr. (Caryophyllaceae) is a species with a highly disjunct distribution that inhabits the alpine mountains of the Mediterranean Basin. We investigated the phylogeny and phylogeography of the species in an attempt to a) clarify the long suggested division of S. ciliata into two subspecies, b) evaluate its phylogenetic origin and c) assess whether the species´ diversification patterns were affected by the Mediterranean relief. For this purpose, we collected DNA from 25 populations of the species that inhabit the mountains of Portugal, Spain, France, Italy, FYROM, Bulgaria and Greece and studied the plastid regions rbcL, rps16 and trnL. Major intraspecific variation was supported by all analyses, while the possibility of existence of more varieties or subspecies was not favoured. Plastid DNA evidence, especially in the cases of rps16 and trnL markers, was in accordance with the division of S. ciliata into the two subspecies, one spreading west (Iberian Peninsula and Central Massif) and the other east of the Alps region (Italian and Balkan Peninsula). The present study proposes that this vicariance has probably derived from the Alps acting as a barrier to the species dispersal. The monophyletic origin of the species is highly supported. Plastid DNA patterns may have resulted from a combination of geographic factors providing links and barriers, climatic adversities and evolutionary processes that took place during Quaternary glaciations. The latter might include hybridization events for the western subspecies and mutational accumulation for the eastern ones.

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