Interglacial–glacial Fuquene-3 pollen record from Colombia: an Eemian to Holocene climate record

摘要: Abstract Pollen analysis of the 43-m-long Fuquene-3 core from Lake Fuquene (5°27′N, 73°46′W), located at 2580-m elevation in Eastern Cordillera Colombia, shows a record vegetational and climatic change since last interglacial. The upper 13 m lake sediments include six 14 C ages ranging 44,100±200 to 8920±200 years BP, this interval is correlated pollen Fuquene-2. lower part compared with Fuquene-7 marine oxygen isotope stages (MIS) general δ 18 O stratigraphy. Cold episodes, corresponding MIS 2 4, are clearly identifiable, whereas long period mainly interglacial conditions has been identified as 5. does not show transition penultimate glacial thought start beginning (‘Eemian’ or ‘Palo Blanco’ interglacial). formalised chronostratigraphy Colombia partly based on Fuquene-3: three stadials interstadials early Pleniglacial (73–60 k.y. BP) middle (60–28 time have recognised. During two periods, were eroded causing hiatus about 36–25 18–10 BP. forest line oscillated between 3300 (max. °C 2550 m) during 2000 (min. 6 m). Compared today, an LGM temperature depression 8 Eemian maximum +1 inferred. Sediment accumulation rates vary 3.8 cm/100 years; highest coincide shallow conditions. Upper Andean vegetation dominated by Quercus Holocene Weinmannia A slow observed mild 5 cool 4 which today reconstructed. maxima stage 5a, minima 5b, 5c relatively short, 5d represented, 5e (‘Palo ‘Eemian’ interglacial) represented: oldest youngest episode.