Dating of paleolakes in the central altiplano of bolivia deutschland kostenlose online dating website
We synthesize the results of the most recent published glacial geologic studies from 12 mountain ranges or regions within Peru and Bolivia where glacial moraines and drift are dated with terrestrial cosmogenic nuclides (TCN), as well as maximum and minimum limiting ages based on radiocarbon in proximal sediments.
Special consideration is given to document paleoglacier valley localities with topographic information given the strong vertical mass balance sensitivity of tropical glaciers.
The name "Lake Minchin" has been used inconsistently to refer to either a lake existing 45,000 years ago, the highest lake in the Altiplano or sediment formations, leading to calls to drop the usage of the name "Minchin".
During its history a number of lakes appeared and then disappeared on the Altiplano.
The Altiplano in South America is a high plateau between the Eastern Cordillera and the Western Cordillera with an average altitude of 3,800 metres (12,500 ft) and a surface area of 200,000 square kilometres (77,000 sq mi).
A number of evaporation landforms can be found in the Altiplano, including Salar de Uyuni and Salar de Coipasa. it was formerly occupied by large lakes that grew and dried out in many phases.
It was formerly considered the highest lake in the Altiplano but research indicated that the highest shoreline belongs to the later Lake Tauca instead.
view of the outer ring at Pampa Aullagas, the upper part is covered in volcanic boulders originally created by flowing lava while the bare sand on the slopes beneath the boulders suggests the plain has dropped in elevation away from the original volcanic mountain.
A glacier advance was in progress in the Andes during that timeperiod.
The name "Minchin" has also been used in other contexts, and it has been proposed that the lake was actually a combination of several different paleolakes.
These lakes were fed by water flowing south via the Desaguadero River from Lake Titicaca in the north and in these periods the precipitation was much greater than today.
Atlantis is presumed to have existed in one of the wet periods when its canals were fed by the overflowing waters of Lake Titicaca.
Lake Ballivián itself is of late Quaternary age and may have influenced the spread and development of animals in the Altiplano.