Abstract
Assuming that orbital variations are the main external cause of the succession of Late Pleistocene ice ages, deep-sea stratigraphers developed an orbital-tuned chronology of the marine oxygen isotope record. The pollen record of Funza (Eastern Cordillera, Colombia) displays in great detail long-range altitudinal shifts of the forest line, being also an expression of long-range fluctuating global temperatures. Both records of palaeotemperature were visually correlated: 48 isotopic events are assumedly reflected in the pollen record. This enables an “orbital-tuning” of the initial time frame of the pollen record, which was based on 14 dated volcanic ash horizons, and provides a detailed record of changes in sediment accumulation in the sedimentary basin of Bogotá. Inferences for the time frame of the pollen record of Páramo de Agua Blanca from the same area are discussed.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.