Environmental Change in the Late Weichselian on the Kullen Peninsula
(2025) In Dissertations in Geology at Lund University GEOR02 20251Department of Geology
- Abstract
- Kullatorpssjön is a small lake located on the Kullen peninsula. This was among the earliest land masses in Sweden to become ice-free, roughly 17,000 cal. BP, following the last deglaciation, and so forms a vital record of the pioneer floral and faunal history of Sweden. This thesis is part of a collaboration between palaeoecologists and archaeologists at Lund University and geoscientists at Stockholm University who are primarily looking to uncover when the first humans colonised Sweden, as well as to investigate pioneer vegetation and animal communities. A 4 m long sediment core was collected from Kullatorpssjön, which is undergoing palaeogenetic (sedaDNA) analysis in Stockholm. A chronology was constructed from this core sequence (KTS-2)... (More)
- Kullatorpssjön is a small lake located on the Kullen peninsula. This was among the earliest land masses in Sweden to become ice-free, roughly 17,000 cal. BP, following the last deglaciation, and so forms a vital record of the pioneer floral and faunal history of Sweden. This thesis is part of a collaboration between palaeoecologists and archaeologists at Lund University and geoscientists at Stockholm University who are primarily looking to uncover when the first humans colonised Sweden, as well as to investigate pioneer vegetation and animal communities. A 4 m long sediment core was collected from Kullatorpssjön, which is undergoing palaeogenetic (sedaDNA) analysis in Stockholm. A chronology was constructed from this core sequence (KTS-2) against which sedaDNA analysis can be compared. The sequence covers the Late Glacial from 19-18,000 cal. BP to 11-10,000 cal. BP. Lithological and geochemical analyses were performed on the KTS-2 sequence, as well as an additional core sequence (KTS-4), on which X-ray fluorescence (XRF) core scanning was performed. XRF data reflect changes in detrital minerogenic input and aquatic productivity. In the uppermost segment of the KTS-4 sequence, K/Rb is used as a weathering indicator. The ratios Fe/Ti and Fe/S were used in the lower segment to identify greigite (iron sulphide) layers. Total organic carbon (TOC) content and carbon/nitrogen (C/N) data provide insight into productivity changes and origin of sediment and organic matter. These data were poorly represented in the KTS-2 sequence, so KTS-4 was analysed more deeply. Both KTS-2 and KTS-4 were correlated to a sequence retrieved in the 1990s, which established environmental change (Sandgren et al., 1999; Hammarlund, 1999). These previous studies include records of mineral magnetic data, ostracod and diatom assemblage data and stable oxygen- and carbon-isotope data. Once correlated together, these three sequences from Kullatorpssjön enabled the expansion and refinement of the current understanding of environmental change at Kullaberg over the Late Weichselian, providing context and dates for the first colonisation of Sweden following the last deglaciation. (Less)
- Abstract (Swedish)
- Kullatorpssjön är en liten sjö på Kullaberg. Det var ett av de första landområdena i Sverige som blev isfritt för efter den senaste avsmältningen för ca 17 000 år sedan, och utgör därför en viktig dokumentation av den tidiga flora- och faunahistorien i Sverige.
Detta projekt är en del av ett samarbete mellan paleoekologer och arkeologer vid Lunds universitet och geologer vid Stockholms universitet som främst syftar till att undersöka när de första människorna koloniserade Sverige, samt att studera tidiga växt- och djursamhällen. En fyra meter lång sedimentsekvens som provtogs från Kullatorpssjön 2024 genomgår nu paleogenetisk (sedaDNA) analys i Stockholm. En kronologi har konstruerats utifrån denna sekvens (KTS-2), mot vilken... (More) - Kullatorpssjön är en liten sjö på Kullaberg. Det var ett av de första landområdena i Sverige som blev isfritt för efter den senaste avsmältningen för ca 17 000 år sedan, och utgör därför en viktig dokumentation av den tidiga flora- och faunahistorien i Sverige.
Detta projekt är en del av ett samarbete mellan paleoekologer och arkeologer vid Lunds universitet och geologer vid Stockholms universitet som främst syftar till att undersöka när de första människorna koloniserade Sverige, samt att studera tidiga växt- och djursamhällen. En fyra meter lång sedimentsekvens som provtogs från Kullatorpssjön 2024 genomgår nu paleogenetisk (sedaDNA) analys i Stockholm. En kronologi har konstruerats utifrån denna sekvens (KTS-2), mot vilken sedaDNA-analysen kan jämföras. Sekvensen täcker senglacial tid från cirka 19–18 000 år före nutid till 11-10,000 år före nutid.
Litologiska och geokemiska analyser utfördes på KTS-2 sekvensen, samt på ytterligare en sekvens (KTS-4), på vilken XRF-analys genomfördes. XRF-data avspeglar förändringar i tillförsel av minerogent material från avrinningsområdet och akvatisk produktivitet. I det KTS-2 översta segment används K/Rb som en vittringsindikator. Fe/Ti- och Fe/S-kvoterna användes i det undre segmentet för att identifiera lager med järnsulfidmineralet greigit. Totalhalten av organiskt kol (TOC) avspeglar förändringar i akvatisk produktivitet och C/N-kvoten ger information om det organiska materialets ursprung. Dessa data var dåligt representerade i KTS-2-sekvensen, så KTS-4 analyserades mer ingående.
Både KTS-2 och KTS-4 korrelerades med en sekvens som provtogs på 1990-talet för analys av senglaciala miljöförändringar (Sandgren et al. 1999; Hammarlund, 1999). Dessa tidigare undersökningar inkluderade analyser av mineralmagnetiska parametrar, ostrakod- och diatomésamhällen samt stabila kol- och syreisotoper. Genom integrerad analys av dessa tre sekvenser från Kullatorpssjön har förståelsen av miljöförändringar vid Kullaberg under slutfasen av Weichselistiden kunnat fördjupas, vilket ger viktiga bidrag till kunskapen om den första kolonisationen av Sverige efter den senaste istiden. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/student-papers/record/9198291
- author
- Dyson, Sarah LU
- supervisor
-
- Dan Hammarlund LU
- Mats Rundgren LU
- organization
- course
- GEOR02 20251
- year
- 2025
- type
- H2 - Master's Degree (Two Years)
- subject
- publication/series
- Dissertations in Geology at Lund University
- report number
- 703
- language
- English
- id
- 9198291
- date added to LUP
- 2025-06-16 09:38:02
- date last changed
- 2025-06-16 09:38:02
@misc{9198291,
abstract = {{Kullatorpssjön is a small lake located on the Kullen peninsula. This was among the earliest land masses in Sweden to become ice-free, roughly 17,000 cal. BP, following the last deglaciation, and so forms a vital record of the pioneer floral and faunal history of Sweden. This thesis is part of a collaboration between palaeoecologists and archaeologists at Lund University and geoscientists at Stockholm University who are primarily looking to uncover when the first humans colonised Sweden, as well as to investigate pioneer vegetation and animal communities. A 4 m long sediment core was collected from Kullatorpssjön, which is undergoing palaeogenetic (sedaDNA) analysis in Stockholm. A chronology was constructed from this core sequence (KTS-2) against which sedaDNA analysis can be compared. The sequence covers the Late Glacial from 19-18,000 cal. BP to 11-10,000 cal. BP. Lithological and geochemical analyses were performed on the KTS-2 sequence, as well as an additional core sequence (KTS-4), on which X-ray fluorescence (XRF) core scanning was performed. XRF data reflect changes in detrital minerogenic input and aquatic productivity. In the uppermost segment of the KTS-4 sequence, K/Rb is used as a weathering indicator. The ratios Fe/Ti and Fe/S were used in the lower segment to identify greigite (iron sulphide) layers. Total organic carbon (TOC) content and carbon/nitrogen (C/N) data provide insight into productivity changes and origin of sediment and organic matter. These data were poorly represented in the KTS-2 sequence, so KTS-4 was analysed more deeply. Both KTS-2 and KTS-4 were correlated to a sequence retrieved in the 1990s, which established environmental change (Sandgren et al., 1999; Hammarlund, 1999). These previous studies include records of mineral magnetic data, ostracod and diatom assemblage data and stable oxygen- and carbon-isotope data. Once correlated together, these three sequences from Kullatorpssjön enabled the expansion and refinement of the current understanding of environmental change at Kullaberg over the Late Weichselian, providing context and dates for the first colonisation of Sweden following the last deglaciation.}},
author = {{Dyson, Sarah}},
language = {{eng}},
note = {{Student Paper}},
series = {{Dissertations in Geology at Lund University}},
title = {{Environmental Change in the Late Weichselian on the Kullen Peninsula}},
year = {{2025}},
}