The lateglacial vegetation and radiocarbon dating of lake Trilistnika, Rila Mountains (Bulgaria)

• Pollen analysis, supplemented by 5 C-14 dates, was carried out on the lateglacial section (160 cm) of a core retrieved from the glacial Lake Trilistnika (2216 m) in the northwestern Rila Mountains (Bulgaria). The reconstruction of the lateglacial vegetation history is linked for the first time to a chronological framework for the time window 13000-10000 B.P. The delimitation of an interstadial/stadial cycle, analogous with the Bolling/Allerpd-Younger Dryas from Western Europe, is based on important changes in the pollen stratigraphy. Mountain-steppe vegetation composed of Artemisia, Chenopodiaceae, Poaceae and other cold-resistant herbs, with isolated stands of Pinus and Juniperus-Ephedra shrubland, dominated the landscape after the ice-retreat. Interstadial conditions were established before 12815 +/- 130 B.P. The spread of tree vegetation at lower elevation as a response to the climate improvement was confined to the time interval 12110 +/- 95-11140 +/- 75 B.P. The Younger Dryas stadial is characterised by a re-advance of the mountain-steppe vegetation. The results are compared with other sites of lateglacial age from the high mountains (Rila, northern Pirin, western Rhodopes) in southern Bulgaria.

Ämnesord

NATURVETENSKAP  -- Geovetenskap och miljövetenskap (hsv//swe)

NATURAL SCIENCES  -- Earth and Related Environmental Sciences (hsv//eng)

Nyckelord

pollen

lateglacial vegetation

radiocarbon dating

Lake Trilistnika

Rila Mountains

Bulgaria

Earth sciences

Geovetenskap

Publikations- och innehållstyp

ref (ämneskategori)

art (ämneskategori)