Physical Sciences and Mathematics Commons^™

Late-Quaternary Lowstands Of Lake Titicaca: Evidence From High-Resolution Seismic Data, Karin D'Agostino, Geoffrey Seltzer, Paul A. Baker, Sherilyn C. Fritz, Robert Dunbar

Department of Earth and Atmospheric Sciences: Faculty Publications

Approximately 600 km of high-resolution seismic reflection data were collected to investigate the late-Quaternary stratigraphic development of Lake Titicaca. The focus of this report is on two seismic sequence boundaries, which are interpreted as erosional surfaces formed at times of low lake level. The younger erosional surface occurs as much as 90 m below the present lake level and up to 8 m below the present sediment–water interface. This erosional surface is interpreted to be coeval with a well-documented early- to mid-Holocene lowstand, dated between ~8,000 and 3,600 cal yr BP. An earlier and previously unknown erosional surface occurs at …