18 Limnogeology and Paleoclimatology—Investigating Past Environments and Reconstructing Past Climates (Posters)

Monday, 18 April 2016
1:30 PM - 5:30 PM
Illinois Ballroom AB

A HIGH-RESOLUTION PáRAMO RECORD OF LAGUNA DE SISCUNSI, BOYACá, COLUMBIA

Paper number: 18-10
Program: Theme Sessions
Time: 1:30 PM – 5:30 PM

Authors

Abstract

Laguna de Siscunsi (3685.6 m asl; 5.647390°N, -72.787570°W) is a small alpine lake located in a páramo environment in Boyacá, Columbia. Sediment records spanning the Holocene have not yet been produced from lakes in this area, which likely contain continuous sediment archives of Northern Hemisphere SASM variability. Here, we present initial limnology (lake and watershed characterization, lake sediment coring, and geochronology), sedimentology (loss on ignition, magnetic susceptibility, and grain size), and geochemistry (organic carbon and nitrogen isotopic analysis) from a sediment core from Siscunsi in order to gain additional understanding of the local paleoclimate and hydrological cycles. Data from Siscunsi will be used to provide a high-resolution perspective of change in the páramo environment, which is an important component of the local water cycle and an ecological niche in its own right. Variations in the climatic zone represented by Siscunsi affect other regional lakes, including nearby Lago de Tota, which provides water resources for more than ~400,000 people. An improved understanding of past and present changes in regional hydrological system will allow for a better understanding of how continued warming might affect sensitive hydrologic systems.

Geological Society of America Abstracts with Programs. Vol. 48, No. 5

doi: 10.1130/abs/2016NC-275407

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