Bolivia ; C 14 dating ; Climatic variation ; Core sampling ; Geochemistry ; Geochronology ; Holocene ; Lacustrine sedimentation ; Lake ; Lake level ; Lithology ; Peru ; Quaternary ; South America ; Watershed
Sediment cores collected from the southern basin of Lake Titicaca, on a transect from 4.6 m above overflow level to 15.1 m below overflow level are used to identify a new century-scale chronology of Holocene lake-level variations. The results
indicate that lithologic and geochemical analyses on a transect of cores can be used to identify and date century-scale lake-level changes. Detailed sedimentary analyses of subfacies and radiocarbon dating were conducted on 4 representative cores. Several
. 1100) coincided with periods of abrupt, profound climate change. The timing and magnitude of climate changes are inferred from stratigraphic evidence of lake-level variation recorded in 14C-dated lake-sediments cores. A prolonged drier period (ca. A.D