Lake Cabana is an ancient lake in the Altiplano.
The lake reached a water level of 3,900 metres (12,800 ft) over the central and northern Altiplano, [1] 90 metres (300 ft) above the current lake levels of Lake Titicaca. [2] The Capalla- Ulloma sill, which separates the Altiplano into a northern and southern basin, [3] did not exist at that time and it did not split up the Cabana lake body. It left deposits reaching thicknesses of 50 metres (160 ft) of thickness; [4] they have been found on the western and eastern sides of the basin. [2] Erosion platforms and terraces covered with gravels [5] and other wave cut structures are remnants of Lake Cabana. [6]
In 1984, this lake was named by a group of researchers [7] around A. Lavenu. [8] Other ancient lakes on the Altiplano are Lake Mataro, Lake Ballivian, Lake Minchin and Lake Tauca. [9] An erosion surface at 3,900 metres (12,800 ft) elevation and associated clays were formerly attributed with Ballivián [10] [11] but today shorelines at that elevation are instead associated with Cabana. [1]
The lake existed about 1 million years ago. It was preceded by Lake Mataro and succeeded by Lake Escara and Lake Ballivian, the latter in the north and the former in the south. [1] The Kaluyo glaciation preceded the formation of Lake Cabana, [4] earlier it was believed that the 3,900 metres (12,800 ft) high formations predated any glaciation. [12] A phase of tectonic extension in the Titicaca basin may have favoured the formation of this lake. [13] The existence of this lake may have facilitated the diversification of Heleobia snails, but increased speciation only occurred during the subsequent Ballivian episode. [14]
{{
cite book}}
: CS1 maint: location missing publisher (
link)
Lake Cabana is an ancient lake in the Altiplano.
The lake reached a water level of 3,900 metres (12,800 ft) over the central and northern Altiplano, [1] 90 metres (300 ft) above the current lake levels of Lake Titicaca. [2] The Capalla- Ulloma sill, which separates the Altiplano into a northern and southern basin, [3] did not exist at that time and it did not split up the Cabana lake body. It left deposits reaching thicknesses of 50 metres (160 ft) of thickness; [4] they have been found on the western and eastern sides of the basin. [2] Erosion platforms and terraces covered with gravels [5] and other wave cut structures are remnants of Lake Cabana. [6]
In 1984, this lake was named by a group of researchers [7] around A. Lavenu. [8] Other ancient lakes on the Altiplano are Lake Mataro, Lake Ballivian, Lake Minchin and Lake Tauca. [9] An erosion surface at 3,900 metres (12,800 ft) elevation and associated clays were formerly attributed with Ballivián [10] [11] but today shorelines at that elevation are instead associated with Cabana. [1]
The lake existed about 1 million years ago. It was preceded by Lake Mataro and succeeded by Lake Escara and Lake Ballivian, the latter in the north and the former in the south. [1] The Kaluyo glaciation preceded the formation of Lake Cabana, [4] earlier it was believed that the 3,900 metres (12,800 ft) high formations predated any glaciation. [12] A phase of tectonic extension in the Titicaca basin may have favoured the formation of this lake. [13] The existence of this lake may have facilitated the diversification of Heleobia snails, but increased speciation only occurred during the subsequent Ballivian episode. [14]
{{
cite book}}
: CS1 maint: location missing publisher (
link)