Evidence of early deglaciation (18 000 cal a bp) and a postglacial relative sea‐level curve from southern Karmøy, south‐west Norway

Based on six consistent radiocarbon dates from the isolation basins Grødheimsvatnet and Kringlemyr, we estimate a minimum deglaciation age for southern Karmøy, an island in outer Boknafjorden (south‐west Norway), of around 18 000 calibrated years before present (18k cal a bp). We use microscopic phytoplankton, macrofossils, lithostratigraphic evidence and X‐ray fluorescence data to identify the isolation contacts in the basins, and date them to 17.52–17.18k cal a bp in Grødheimsvatnet [15.57 m above present mean sea level (MSL)] and 16.19–15.80k cal a bp in Kringlemyr (11.99 m above MSL). Combining these data with previous studies, we construct a relative sea‐level (RSL) curve from 18k cal a bp until the present, which is ~3 ka longer than any previous RSL reconstruction from southern Norway. Following deglaciation, southern Karmøy has experienced a net emergence of around 16–19 m, although with significant RSL fluctuations. This includes two RSL minima well below present MSL around ~13.8 and ~10k cal a bp, and two maxima that culminated around 5–7 m above MSL during the Younger Dryas and early to mid‐Holocene, respectively. Considering eustatic sea level and modelled gravitational deformation of the geoid, we estimate a net postglacial isostatic uplift of ~120 m. © 2019 John Wiley & Sons, Ltd

• Publication year

  2019

• Venue

  Journal of Quaternary Science

• Publication date

  2019-07-23

• Fields of study

  Geology, Environmental Science

• Identifiers
  DOI 10.1002/jqs.3109
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

• No claims are published for this paper.

• No concepts are published for this paper.

• Relative Sea-Level Changes and Ice Sheet History in Finderup Land, North Greenland

  2018cited by this paper
• The last deglaciation of the Norwegian Channel – geomorphology, stratigraphy and radiocarbon dating

  2018cited by this paper
• Relative sea-level changes and crustal movements in Britain and Ireland since the Last Glacial Maximum

  2018influential reference
• Quantifying variable rates of postglacial relative sea level fall from a cluster of 24 isolation basins in southern Norway

  2018cited by this paper
• Deglaciation of Boknafjorden, south‐western Norway

  2017cited by this paper
• The deep accumulation of 10Be at Utsira, southwestern Norway: Implications for cosmogenic nuclide exposure dating in peripheral ice sheet landscapes

  2016cited by this paper
• Postglacial relative sea-level history of the Prince Rupert area, British Columbia, Canada

  2016cited by this paper
• A major re-growth of the Scandinavian Ice Sheet in western Norway during Allerød-Younger Dryas

  2016cited by this paper
• Salinity tolerance of four freshwater microalgal species and the effects of salinity and nutrient limitation on biochemical profiles

  2016cited by this paper
• Sensitivity of palaeotidal models of the northwest European shelf seas to glacial isostatic adjustment since the Last Glacial Maximum

  2016influential reference
• The last Eurasian ice sheets – a chronological database and time‐slice reconstruction, DATED‐1

  2016cited by this paper
• Early break-up of the Norwegian Channel Ice Stream during the Last Glacial Maximum

  2015cited by this paper
• Micro-XRF Core Scanning in Palaeolimnology: Recent Developments

  2015cited by this paper
• A Holocene sea‐level curve and revised isobase map based on isolation basins from near the southern tip of Norway

  2015cited by this paper
• On the reconstruction of palaeo-ice sheets: Recent advances and future challenges

  2015cited by this paper
• IntCal13 calibrated ages of the Vedde and Saksunarvatn ashes and the Younger Dryas boundaries from Kråkenes, western Norway

  2014cited by this paper
• Closing the sea level budget at the Last Glacial Maximum

  2014cited by this paper
• A model of Greenland ice sheet deglaciation constrained by observations of relative sea level and ice extent

  2014influential reference
• Sea level and global ice volumes from the Last Glacial Maximum to the Holocene

  2014cited by this paper
• Culture of the hydrocarbon producing microalga Botryococcus braunii strain Showa: optimal CO2, salinity, temperature, and irradiance conditions.

  2013cited by this paper
• IntCal13 and Marine13 Radiocarbon Age Calibration Curves 0–50,000 Years cal BP

  2013cited by this paper
• Evidence for Storegga tsunami run‐up at the head of Nordfjord, western Norway

  2013cited by this paper
• A multi-proxy approach to assessing isolation basin stratigraphy from the Lofoten Islands, Norway

  2011cited by this paper
• High‐resolution X‐ray fluorescence core scanning analysis of Les Echets (France) sedimentary sequence: new insights from chemical proxies

  2011cited by this paper
• Isolation basins, sea-level changes and the Holocene history of the Greenland Ice Sheet

  2011influential reference
• Lateglacial vegetation and palaeoenvironment in W Norway, with new pollen data from the Sunnmøre region

  2011cited by this paper
• Late Weichselian vegetation, climate, and floral migration at Liastemmen, North Rogaland, south-western Norway

  2010influential reference
• Introduction to Freshwater Algae

  2010influential reference
• Methods and code for 'classical' age-modelling of radiocarbon sequences.

  2010influential reference
• Middle and Late Weichselian (Devensian) glaciation history of south-western Norway, North Sea and eastern UK

  2009cited by this paper
• Late Weichselian glaciation history of the northern North Sea

  2008cited by this paper
• Late Weichselian and Holocene shoreline displacement in the Trondheimsfjord area, central Norway

  2008cited by this paper
• Holocene shore displacement and shorelines in Hordaland, western Norway

  2008cited by this paper
• Effect of salinity on growth of green alga Botryococcus braunii and its constituents.

  2007cited by this paper
• Sea-level fluctuations imply that the Younger Dryas ice-sheet expansion in western Norway commenced during the Allerød

  2007cited by this paper
• Neotectonic faulting and the Late Weichselian shoreline gradients in SW Norway

  2007influential reference
• Changes in North Atlantic Radiocarbon Reservoir Ages During the Allerød and Younger Dryas

  2006cited by this paper
• Marine 14C reservoir ages for 19th century whales and molluscs from the North Atlantic

  2006cited by this paper
• ITRAX: description and evaluation of a new multi-function X-ray core scanner

  2006influential reference
• Marine reservoir age variability and water mass distribution in the Iceland Sea

  2004cited by this paper
• Late quaternary ice sheet history of northern Eurasia

  2004cited by this paper
• Calendar year age estimates of Allerød–Younger Dryas sea‐level oscillations at Os, western Norway

  2004cited by this paper
• GLOBAL GLACIAL ISOSTASY AND THE SURFACE OF THE ICE-AGE EARTH: The ICE-5G (VM2) Model and GRACE

  2004cited by this paper
• Consistently large marine reservoir ages in the Norwegian Sea during the Last Deglaciation

  2003cited by this paper
• Review of the Green Algal Genus Pediastrum; - Implication for Pollenanalytical Research

  2001cited by this paper
• Indicative value ofPediastrum and other coccal green algae in palaeoecology

  2000cited by this paper
• Late Devensian and Holocene records of relative sea-level changes in northwest Scotland and their implications for glacio-hydro-isostatic modelling

  2000cited by this paper
• Late glacial sea level and ocean margin environmental changes interpreted from biostratigraphic and lithostratigraphic studies of isolation basins in northwest Scotland

  1997cited by this paper
• The North Atlantic atmosphere-sea surface 14C gradient during the Younger Dryas climatic event

  1994cited by this paper
• A Piston Corer for Lacustrine and Marine Sediments

  1992influential reference
• Late Weichselian and early Holocene vegetation, climate, and floral migration at Utsira, North-Rogaland, southwestern Norway

  1990cited by this paper
• Basis set quality versus size II. Approximate GTO wave functions for second row transition metal atoms

  1989cited by this paper
• Late Weichselian and holocene sea-level history for a cross-section of western Norway

  1987cited by this paper
• Sporopollenin Dinoflagellate Cysts: Their Morphology and Interpretation

  1985cited by this paper
• Changes in shore-level and ice-front position in Late Weichsel and Holocene, southern Norway

  1985cited by this paper
• A Younger Dryas Ash Bed in Western Norway, and Its Possible Correlations with Tephra in Cores from the Norwegian Sea and the North Atlantic

  1984cited by this paper
• Descriptions of new fossil dinoflagellates from the Late Quaternary of the Black Sea

  1973cited by this paper
• Tablets with spores used in absolute pollen analysis

  1971cited by this paper
• The influence of brackish water on the growth of Chlorococcales particularly Scenedesmus: With 9 figures in the text

  1969cited by this paper
• Textbook of Pollen Analysis

  1965cited by this paper

• Shoreline and deglaciation chronology in southeast Norway

  2025cites this paper
• Relative sea‐level trends in southern Norway during the last millennium

  2025cites this paper
• Refining Holocene sea‐level variations for the Lofoten and Vesterålen archipelagos, northern Norway: implications for prehistoric human–environment interactions

  2024cites this paper
• Correlation of Seismic Data and Sediment Cores From the Seabed in the Medieval Harbour at Avaldsnes, Norway

  2024influential citation
• Submerged Mesolithic plant remains reveal lush thermophilous woodland on remote isle off the SW-Norwegian coast

  2024cites this paper
• An interactive visualization and data portal tool (PALTIDE) for relative sea level and palaeotidal simulations of the northwest European shelf seas since the Last Glacial Maximum

  2024cites this paper
• Evolution of Global Ocean Tide Levels Since the Last Glacial Maximum

  2023cites this paper
• From tundra to tree-birch; late-glacial and early Holocene environment and vegetation oscillations at the ecotonal positioned Bjerkreim, Dalane, SW Norway

  2023cites this paper
• Siste istids isavsmelting og innvandring av planter til Sør-Norge

  2023cites this paper
• Marine Geophysical Survey of a Medieval Shipwreck in Shallow Waters Using an Autonomous Surface Vehicle: A Case Study from Avaldsnes, Norway

  2023influential citation
• Postglacial relative sea level change in Norway

  2022cites this paper
• Last interglacial sea-level proxies in the glaciated Northern Hemisphere

  2022influential citation
• A reconciled solution of Meltwater Pulse 1A sources using sea-level fingerprinting

  2021cites this paper
• Deglaciation of the Scandinavian Ice Sheet and a Younger Dryas ice cap in the outer Hardangerfjorden area, southwestern Norway

  2021cites this paper
• Last interglacial (MIS 5e) sea level proxies in the glaciated Northern Hemisphere

  2021cites this paper
• The Early-Mid Holocene transgression (Tapes) at the Norwegian coast – comparing observations with numerical modelling

  2020cites this paper
• Northward Shifts in the Polar Front Preceded Bølling and Holocene Warming in Southwestern Scandinavia

  2020cites this paper
• Eurasian Ice Sheet collapse was a major source of Meltwater Pulse 1A 14,600 years ago

  2020cites this paper
• UncertainData.jl: a Julia package for working with measurements and datasets with uncertainties

  2019cites this paper