Universität zu Köln

Laermanns, Hannes, May, Simon Matthias ORCID: 0000-0001-6762-7500, Kelterbaum, Daniel, Kirkitadze, Giorgi, Opitz, Stephan, Navrozashvili, Levan, Elashvili, Mikheil and Brueckner, Helmut (2019). Coastal lowland and floodplain evolution along the lower reacnes of the Supsa River (western Georgia). E G Quatern. Sci. J., 68 (2). S. 119 - 140. GOTTINGEN: COPERNICUS GESELLSCHAFT MBH. ISSN 2199-9090

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Abstract

In the southernmost part of the Colchian plain (Georgia), the Supsa and Rioni rivers represent important catchments for reconstructing Holocene landscape changes. Using granulometric methods, geochemical analyses and radiocarbon dating, we demonstrate that significant palaeoenvironmental changes have taken place in the surroundings of the Supsa fan since at least 4000 BCE. The initial foothill fan accumulation was prolonged by delta plain progradation. Due to continued fluvial sediment supply, mainly from the Rioni, the lagoon silted up and extended peat bogs formed east of the beach ridge complex. The Supsa fan first prograded northwards (since the third millennium BCE) and later shifted westwards, eventually following an avulsion of the Rioni. While Supsa deposits remain limited to the area of the fan and the modern estuary, the alluvial fines of the Rioni dominate the surrounding areas. The relative sea-level (RSL) index points of the region suggest a gradual RSL rise from similar to -9 m between 4000 and 3500 BCE to -3/-2 m below the modern sea level in the second half of the first millennium BCE, the period during which Greek colonization and Colchian settlements are attested by archaeological remains.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Laermanns, Hannes UNSPECIFIED UNSPECIFIED UNSPECIFIED May, Simon Matthias UNSPECIFIED orcid.org/0000-0001-6762-7500 UNSPECIFIED Kelterbaum, Daniel UNSPECIFIED UNSPECIFIED UNSPECIFIED Kirkitadze, Giorgi UNSPECIFIED UNSPECIFIED UNSPECIFIED Opitz, Stephan UNSPECIFIED UNSPECIFIED UNSPECIFIED Navrozashvili, Levan UNSPECIFIED UNSPECIFIED UNSPECIFIED Elashvili, Mikheil UNSPECIFIED UNSPECIFIED UNSPECIFIED Brueckner, Helmut UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-134763
DOI:	10.5194/egqsj-68-119-2019
Journal or Publication Title:	E G Quatern. Sci. J.
Volume:	68
Number:	2
Page Range:	S. 119 - 140
Date:	2019
Publisher:	COPERNICUS GESELLSCHAFT MBH
Place of Publication:	GOTTINGEN
ISSN:	2199-9090
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language Geology Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/13476