Cabana (ancient lake)

Short description: Ancient lake in the Altiplano

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]

## References

1. ↑ 1.0 1.1 1.2 Wirrmann, Denis; Mourguiart, Philippe (May 1995). "Late Quaternary Spatio-temporal Limnological Variations in the Altiplano of Bolivia and Peru". Quaternary Research 43 (3): 346. doi:10.1006/qres.1995.1040. Bibcode: 1995QuRes..43..344W.
2. ↑ 2.0 2.1 Wirrmann et al. 1992, p. 40.
3. ↑ Wirrmann et al. 1992, p. 10.
4. ↑ 4.0 4.1 Wirrmann et al. 1992, p. 8.
5. ↑ Newell 1949, p. 91.
6. ↑ Newell 1949, p. 92.
7. ↑ Fornari, Michel; Risacher, François; Féraud, Gilbert (August 2001). "Dating of paleolakes in the central Altiplano of Bolivia". Palaeogeography, Palaeoclimatology, Palaeoecology 172 (3–4): 270. doi:10.1016/S0031-0182(01)00301-7. Bibcode: 2001PPP...172..269F.
8. ↑ Lavenu, A.; Fornari, M.; Sebrier, M. (1984). "Existence de deux nouveaux izpisodes lacustres Quaternaires dans l'altiplano péruvo-bolivien" (in fr). Cah ORSTOM Sér Géol 15 (1): 107. https://core.ac.uk/download/pdf/39872822.pdf.
9. ↑ E. Gierlowski-Kordesch; K. Kelts (23 November 2006). Global Geological Record of Lake Basins. Cambridge University Press. p. 405. ISBN 978-0-521-03168-4. https://books.google.com/books?id=QLOvXlH1y9wC&pg=PA405.
10. ↑ Schäbitz, F.; Liebricht, H. (1999). "Zur Landschaftsgeschichte der Halbinsel Copacabana im peruanisch-bolivianischem Grenzbereich des Titicacagebietes" (in de). Beiträge zur quartären Landschaftsentwicklung Südamerikas. Festschrift zum 65. Geburtstag von Professor Dr. Karsten Garleff.. Bamberger geographische Schriften. Bamberg. p. 117. OCLC 602709757.
11. ↑ Newell 1949, p. 82.
12. ↑ Newell 1949, p. 85.
13. ↑ Wirrmann et al. 1992, p. 12.
14. ↑ Kroll, Oliver; Hershler, Robert; Albrecht, Christian; Terrazas, Edmundo M.; Apaza, Roberto; Fuentealba, Carmen; Wolff, Christian; Wilke, Thomas (July 2012). "The endemic gastropod fauna of Lake Titicaca: correlation between molecular evolution and hydrographic history". Ecology and Evolution 2 (7): 1517–30. doi:10.1002/ece3.280. PMID 22957159.

### Sources

* Newell, Norman D. (1949). "Geology of the Lake Titicaca Region, Peru and Bolivia" (in en). GSA Memoirs. Geological Society of America Memoirs. 36. Geological Society of America. pp. 1–124. doi:10.1130/mem36-p1.
* Wirrmann, Denis; Ybert, Jean-Pierre; Mourguiart, Philippe; Ybert, J.-P. (1992-01-01). "Paleohydrology". in Dejoux, C.. Lake Titicaca. Monographiae Biologicae. 68. Springer Netherlands. pp. 40–62. doi:10.1007/978-94-011-2406-5_3. ISBN 9789401050616.

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Pleistocene proglacial lakes and related seas

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New Mexico|

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South America|

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* Cabana
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Summary|

* List of prehistoric lakes

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