Holocene glacier history of northeastern Cordillera Darwin, southernmost South America (55°S)

2021 ◽  
pp. 1-16
Author(s):  
Scott A. Reynhout ◽  
Michael R. Kaplan ◽  
Esteban A. Sagredo ◽  
Juan Carlos Aravena ◽  
Rodrigo L. Soteres ◽  
...  
Keyword(s):  
South America ◽  
Last Millennium ◽  
Glacial History ◽  
Dry Period ◽  
The North ◽  
Southward Shift ◽  
History Of ◽  
Glacial Expansion ◽  
The Antarctic ◽  
Glacial Advance

Abstract In the Cordillera Darwin, southernmost South America, we used 10Be and 14C dating, dendrochronology, and historical observations to reconstruct the glacial history of the Dalla Vedova valley from deglacial time to the present. After deglacial recession into northeastern Darwin and Dalla Vedova, by ~16 ka, evidence indicates a glacial advance at ~13 ka coeval with the Antarctic Cold Reversal. The next robustly dated glacial expansion occurred at 870 ± 60 calendar yr ago (approximately AD 1150), followed by less-extensive dendrochronologically constrained advances from shortly before AD 1836 to the mid-twentieth century. Our record is consistent with most studies within the Cordillera Darwin that show that the Holocene glacial maximum occurred during the last millennium. This pattern contrasts with the extensive early- and mid-Holocene glacier expansions farther north in Patagonia; furthermore, an advance at 870 ± 60 yr ago may suggest out-of-phase glacial advances occurred within the Cordillera Darwin relative to Patagonia. We speculate that a southward shift of westerlies and associated climate regimes toward the southernmost tip of the continent, about 900–800 yr ago, provides a mechanism by which some glaciers advanced in the Cordillera Darwin during what is generally considered a warm and dry period to the north in Patagonia.

South America—Andes

2017 ◽  
Author(s):  
George F. Lau
Keyword(s):  
South America ◽  
North Coast ◽  
Small Worlds ◽  
Fertility Status ◽  
The North ◽  
Form Function ◽  
History Of

This chapter details major figurine developments in the ancient Andes and discusses new understandings based on figurine form, function, and imagery. Great formal diversity characterizes the long history of their use. The most active traditions occurred along the coast, while data from the highlands and eastern slopes are more limited. Certain regions, especially the north coast, show longevity in the use of figurines, especially in household, funerary, and offering contexts. Figurines were important for their role in embodying identity (e.g. gender, fertility, status) as well as alterity. Production and ritual embued them with divine powers and agency. Figurine use and imagery also show dual structures, often manifested in gendered pairs or object sets. Finally, Andean figurines were important for their interactions with other contexts and things, including other figurine-like items: they inspired their own small worlds of sociality.

The discovery of “sale amarissimo antifebbrile” (“bitter febrifugal saline”) by Bartolommeo Rigatelli, i.e. the origins of pharmacoeconomics

2008 ◽  
Vol 9 (1) ◽  
pp. 15-18
Author(s):  
Piero Marson ◽  
Giampiero Pasero
Keyword(s):  
South America ◽  
Active Component ◽  
Management Policy ◽  
Drug Sale ◽  
The North ◽  
History Of ◽  
Willow Bark

When considering the history of salycilates, it has to be underlined that a number of Italian scientists made significant contributions on such a topic. Among these, two pharmacists, Bartolommeo Rigatelli in Verona and Francesco Fontana in Lazise, carried out the first extraction of the active component of willow bark in 1824. Rigatelli named the drug “sale amarissimo antifebbrile” (“bitter febrifugal saline”). In his report some references of pharmacoeconomics are sketched out, thus indicating the attention that the Austrian government on the North Italian districts gave to the management policy. In fact, Rigatelli carried out an economic account of the use of salicin extracts as an antipyretic agent instead of the chincona bark which had been imported from South America at that time and was very expensive. This historical report gives rise to outline a brief history of pharmacoeconomics.

A model for paleobiogeography of South American cricetine rodents

Paleobiology ◽  
1979 ◽  
Vol 5 (2) ◽  
pp. 126-132 ◽  
Author(s):  
Larry G. Marshall
Keyword(s):  
South America ◽  
Central America ◽  
South American ◽  
Land Bridge ◽  
The Andes ◽  
History Of ◽  
Grassland Habitats ◽  
The Guianas ◽  
Forest Habitats ◽  
Glacial Advance

A model for the paleobiogeographic history of South American cricetine rodents is proposed based on new and/or recently published fossil, geological, paleobotanical and radioisotope data. Cricetine rodents of the tribe Sigmodontini evolved in North America before 7.0 Myr BP. They got to South America by waif dispersal across the Bolivar Trough marine barrier from Central America during a world wide drop in sea level (the “Messinian Low”) between 7.0 and 5.0 Myr BP. The basal stock was probably a sylvan (forest) form, from which evolved pastoral (grazing) forms in the savanna-grassland area of Venezuela, Colombia and the Guianas. The pastoral forms in the northern savanna-grassland area were restricted there until about 3.5 Myr BP. At that time there occurred the first glaciation in South America and consonant with glacial advance was a retraction of forest habitats and an expansion of savanna-grassland habitats. At that time the pastoral forms were able to disperse southward through a savanna-grassland corridor along the eastern foothills of the Andes and spread throughout the previously disjunct savanna-grasslands of Bolivia and Argentina. Cricetines are first recorded as fossil in the Monte Hermoso Fm. of Argentina which is about 3.5 Myr BP in age. The Panamanian land bridge came into existence about 3.0 Myr BP as indicated by the beginning of a major interchange of terrestrial faunas between the Americas, which was well underway by 2.7 Myr BP.

XIX.—The Late-glacial History of the Highlands and Islands of Scotland

1955 ◽  
Vol 62 (3) ◽  
pp. 769-928 ◽  
Author(s):  
J. K. Charlesworth
Keyword(s):  
Late Glacial ◽  
Glacial Period ◽  
Glacial History ◽  
The West ◽  
Orkney Islands ◽  
Second Stage ◽  
Late Glacial Period ◽  
The North ◽  
Moray Firth ◽  
History Of

SynopsisFrom the abounding moraines, drainage features (fig. 21) and other marginal indications an attempt has been made to reconstruct the successive phases of the ice in its retreat into the corries of the Highlands and Islands (Pl. I). Two late-glacial stages are recognised. During the first, the Highland Glaciation, an ice-margin ran from the Orkney Islands across the mouth of the Moray Firth to the Buchan and out to sea north of Aberdeen. Twelve substages (A–L) of retreat, arbitrarily selected, have been traced through the country, except in the Moraineless West where they are unrepresented.At the maximum of the second stage, the Moraine Glaciation, the ice readvanced to the line stage M (beaded line in Pl. I). The retreat from this line, the inner boundary of the Moraineless West and of the 100-foot raised beach (Pl. I), is divided into nine substages (N–V), based upon a consideration of snowlines. Substage N corresponds to the 50-foot raised beach, substage P to an important readvance.The snowline throughout the late-glacial period ran in the west parallel with the meridians and rose eastwards. The disposition of the snowlines for stage M is given in fig. 22, p. 900.The distribution of the ice in the British Isles during the North British, Highland and Moraine Glaciations is represented in fig. 23, p. 923.

scholarly journals Urban network in Poland during last millennium

2020 ◽  
Vol 33 (5) ◽  
pp. 7-20
Author(s):  
Iwona Jażdżewska
Keyword(s):  
Central And Eastern Europe ◽  
Last Millennium ◽  
The Baltic Sea ◽  
Urban Settlement ◽  
Urban Network ◽  
The North ◽  
History Of ◽  
Grand Duchy Of Lithuania ◽  
The Baltic ◽  
East West

The article attempts to find in the history of Poland facts and processes that influenced the contemporary shape of the Polish urban network. In comparison with other parts of Europe, the process of urbanisation in Central and Eastern Europe was significantly delayed. During the last millennium, the Polish state changed its borders many times, mainly in the east-west direction, because the Baltic Sea from the north and the Sudeten and Carpathian ranges from the south effectively inhibited territorial changes in the north-south direction. The process of shaping and strengthening the urban settlement network in Poland to the present day has been divided into five periods. The first, lasting from the 8th century until the union of Kreva in 1385, encompasses the beginnings of the establishment and spreading of urban settlement network; the second – the merger of the urban network with the Grand Duchy of Lithuania and its strengthening in the joint state; the third – the disappearance of Poland from the map of Europe and the breakup of the settlement network into three parts: tsarist Russia, the Habsburg monarchy, Prussia, and the start of industrialisation of the partitioned land; the fourth refers to the period when Poland, after 123 years, reappeared on the administrative map of Europe (1918-1939); and the fifth one covers the period from 1945 to the present day. When undertaking scientific research on the contemporary urban network of Poland, many political, social and economic factors should be taken into account. These should be taken into account when making hypotheses, drawing conclusions and developing economic and geographical theories.

scholarly journals Observations on the connection between glacial phases, natural catastrophes and economic trends of the last millennium in Italy

The Holocene ◽  
2019 ◽  
Vol 29 (8) ◽  
pp. 1322-1334
Author(s):  
Pier Luigi Bragato ◽  
Hanspeter Holzhauser
Keyword(s):  
Volcanic Eruptions ◽  
Economic Consequences ◽  
Current Phase ◽  
Last Millennium ◽  
Natural Catastrophes ◽  
Economic Trends ◽  
History Of ◽  
Glacial Expansion ◽  
Critical Phases ◽  
General Connection

Humanity has often faced critical phases determined by climate changes combined with other natural catastrophes that implied significant socio-economic consequences. In this article, we present an observational study on the possible systematic connection between these factors for the specific case of Italy, comparing the occurrence of pandemics, earthquakes, and volcanic eruptions with the glacial history of the last millennium. We have found that the natural catastrophes concentrate in the periods of ice expansion in Europe, whereas the phenomena are in attenuation in the current phase of global warming. Such a behavior has influenced the economy of the country: in fact, a comparison with a reconstruction of the per capita Gross Domestic Product since 1310 shows that the periods of maximum economic expansion occurred during the deglaciation phases. This study has confirmed the general connection of the climate with a number of Earth processes and the difficulty to foresee its changes. Furthermore, the extension of the analysis at the world level for the last 2500 years has evidenced that different types of pandemics (plague, cholera and influenza) almost exclusively spread during the phases of glacial expansion.

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