Fossil flora from the Pleistocene lacustrine sediments at Ždrilo and Seline (Northern Dalmatia, Croatia)

Adžić, Ivana and Marjanac, Ljerka and Blažić, Luka and Marjanac, Tihomir (2013) Fossil flora from the Pleistocene lacustrine sediments at Ždrilo and Seline (Northern Dalmatia, Croatia). In: 3. znanstveni skup Geologija kvartara u Hrvatskoj s međunarodnim sudjelovanjem povodom 130 godina rodenja akademika Marijana Salopeka i u spomen znanstvenici Maji Paunovic na 10. obljetnicu smrti, Zagreb 21.- 23.3.2013.: knjiga sažetaka. HAZU, Zagreb, pp. 8-9.

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Abstract

Plant macrofossils, mostly leaf impressions, were found in the Pleistocene lacustrine sediments at the seashore outcrops of the South Velebit Channel (locations Ždrilo and Seline), and for the first time a total of 79 specimens were collected during 2011-2012 research period (research still in progress) and 13 taxa were determined, belonging to 9 families (Adžić 2012). The plant macrofossils are apparently of Middle Pleistocene age or even older, according to 339.4±61.4 years minimum age of the overlying glacial sediment at Ždrilo location (Marjanac, 2012). The sediments deposited in a proglacial lake, which occupied the southern part of present Velebit Channel, are associated to glaciers of the South Velebit Mt. at the onset of Mindel Glacial (Skamnelian Stage) (Marjanac, 2012). The Seline lacustrine sediments are varved-like, but consist of predominantly massive silt to clayey-silt beds, otherwise vaguely laminated. Dropstones are common and more frequent than in Ždrilo sediments. Ostracods are found in sediments of both sections, while only at Seline section occur moulds of large gastropods and Unio-type mollusks. The sediment succession represents a proximal depositional zone of a proglacial paleo-lake (Adžić, 2012 ; Marjanac, 2012). The Ždrilo Lacustrine sediments are typical varved glaciolacustrine sediments consisting of alternation of clay, silt-clay and clayey-silt laminae or thin beds (Adžić et al, 2012 ; Marjanac, 2012). Besides abundant plant fossils (Fig. 1), there are well preserved ostracod shells and poorly preserved juvenile mollusk shells. These varvites deposited in a more distal zone of a proglacial paleo-lake than Seline sediments. The plant remains predominantly occur as leaf impressions, commonly on bedding plains and locally within a massive clayey-silt beds.

Item Type: Book Section
Keywords: Pleistocene flora, paleoclimate, Velebit Channel
Date: 2013
Subjects: NATURAL SCIENCES > Geology
Divisions: Faculty of Science > Department of Geology
Project code: 119-0000000-1164
Publisher: HAZU
Depositing User: Sonja Borak
Date Deposited: 19 Mar 2014 09:36
Last Modified: 20 Mar 2014 11:26
URI: http://digre.pmf.unizg.hr/id/eprint/634

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