Late Weichselian and Holocene shoreline displacement in the Trondheimsfjord area, central Norway

Kjemperud, A.

doi:10.1111/j.1502-3885.1986.tb00744.x

Cited by 86 publications

(34 citation statements)

References 22 publications

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“…These gradients are comparable in magnitude to those found in completely deglaciated regions, e.g. Scandinavia (SW Sweden by Bjö rck & Digerfeldt (1991); western-central Norway by Kjemperud (1986); eastern Sweden by Berglund (2004)), but there they are directed towards the periphery of the former ice sheet. The opposite direction found here is the result of the incomplete deglaciation, i.e.…”

Section: Relative Sea-level Changes In the Qaqortoq Areasupporting

confidence: 63%

Holocene relative sea-level changes in the Qaqortoq area, southern Greenland

Sparrenbom¹,

Bennike²,

Björck³

et al. 2008

Boreas

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We present results from an investigation of relative sea-level changes in the Qaqortoq area in south Greenland from c. 11 000 cal. yr BP to the present. Isolation and transgression sequences from six lakes and two tidal basins have been identified using stratigraphical analyses, magnetic susceptibility, XRF and macrofossil analyses. Macrofossils and bulk sediments have been dated by AMS radiocarbon dating. Maximum and minimum altitudes for relative sea level are provided from two deglaciation and marine lagoon sequences. Initially, relative sea level fell rapidly and reached present-day level at Â/9000 cal. yr BP and continued falling until at least 8800 cal. yr BP. Between 8000 and 6000 cal. yr BP, sea level reached its lowest level of around 6 Á/8 m below highest astronomical tide (h.a.t.). At around 3750 cal. yr BP, sea level has reached above 2.7 m below h.a.t. and continued to rise slowly, reaching the present-day level between Â/2000 cal. yr BP and the present. As in the Nanortalik area further south, initial isostatic rebound caused rapid isolation of low elevation basins in the Qaqortoq area. Distinct isolation contacts in the sediments are observed. The late Holocene transgression is less well defined and occurred over a longer time interval. The late Holocene sea-level rise implies reloading by advancing glaciers superimposed on the isostatic signal from the North American Ice Sheet. One consequence of this transgression is that settlements of Palaeo-Eskimo cultures from Â/4000 cal. yr BP may have been transgressed by the sea.Charlotte J. Sparrenbom

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Section: Relative Sea-level Changes In the Qaqortoq Areasupporting

confidence: 63%

Holocene relative sea-level changes in the Qaqortoq area, southern Greenland

Sparrenbom¹,

Bennike²,

Björck³

et al. 2008

Boreas

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“…This is replaced by a littoral sandy environment as recorded by Diploneis minor and Opephora olsenii (Hendey, 1976). greater than 45% P. sulcata (Kjemperud, 1986). Increasing P. sulcata.…”

Section: Resultsmentioning

confidence: 99%

“…Ultimately, freshwater conditions were established in zone IA36d-5. The diatomological isolation (sensu Kjemperud, 1986) of the basin from saline conditions is first recorded at 12 590 AE 290 (15 907-13 865). Relative sea level still lay below the threshold at 10 110 AE 140 (12 337-11 227) and these conditions lasted until at least 8850 AE 150 (10 225-9548).…”

Section: Environmental Interpretationmentioning

confidence: 99%

Late Devensian and Holocene relative sea‐level changes on the Isle of Skye, Scotland, UK

Selby

Smith

2006

J Quaternary Science

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Detailed litho-and biostratigraphical analyses from three coastal sites in contrasting coastal settings on the Isle of Skye, Scotland, UK, reveal evidence for several changes in relative sea level during the Late Devensian and Holocene. At the start of the record, relative sea level in the area was high at ca. 12 500 14 C (ca. 14 800 cal.) yr BP but then fell, reaching a low point during the Younger Dryas, at ca. 11 000-10 000 14 C (ca. 13 000-11 600 cal.) yr BP, when a rock platform, correlated with the Main Rock Platform, was formed. In the early-middle Holocene, relative sea level was rising by ca. 8000 14 C (ca. 8800 cal.) yr BP and in northeast Skye a lagoonal surface, correlated with the Main Postglacial Shoreline, was formed at ca. 6600 14 C (ca. 7500 cal.) yr BP. By the late Holocene, relative sea level was again falling, but a rise, registered at at least two sites, began probably before ca. 4000 14 C (ca. 4500 cal.) yr BP, and a second lagoonal surface in northeast Skye, correlated with the Blairdrummond Shoreline, was formed, although by ca. 3000 14 C (ca. 3200 cal.) yr BP relative sea level in the area had resumed its downward trend. The pattern of relative sea-level changes disclosed is compared with evidence elsewhere in Scotland.

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“…9), indicating that the basin emerged from the sea only slightly before the tsunami impact. Because of a slow emergence rate at this time (Kjemperud 1986), 36 m a d . is a reasonable estimate for the tsunami sea level in the area.…”

Section: Runup In Bjugnmentioning

confidence: 98%

The Storegga tsunami along the Norwegian coast, its age and run up

Bondevik

Svendsen²,

Johnsen

et al. 1997

Boreas

195

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1997 (March): The Storegga tsunami along the Norwegian coast, its age and runup. Boreas, VoI. 26, pp. 29-53. OSIO. ISSN 0300-9483.The statigraphy in 25 coastal lakes shows that most of the Norwegian coastline was impacted by a large tsunami about 7200 I4C BP. The methodology has been to core a staircase of lake basins above the contemporary sea level in several areas and to map the tsunami deposit to its maximum elevation. The tsunami was identified in the sedimentary record as an erosional unconformity overlain by graded or massive sand with shell fragments, followed by redeposited organic detritus. The greatest recorded runup along the coast (10-11 m above high tide) is found in areas most proximal to the Storegga slide scar on the Norwegian continental slope (Sunnmerre). To the north and south, runup is less, about 6-7 m at Bjugn (250 km north of Sunnmerre) and about 3-5 m in Austrheim (200 km to the south of Sunnmerre). This runup pattern supports the suggestion that the tsunami was generated by the Second Storegga Slide. The recorded runup heights are consistent within and between the investigated areas, and imply that the tsunami wave was not significantly influenced by the local topography, suggesting a very long wave length. The mapped runup estimates are in good agreement with a numerical model of the tsunami generated by the Second Storegga slide, and indicate that the slide was a single major event rather than a set of smaller slides.

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Late Weichselian and Holocene shoreline displacement in the Trondheimsfjord area, central Norway

Cited by 86 publications

References 22 publications

Holocene relative sea-level changes in the Qaqortoq area, southern Greenland

Holocene relative sea-level changes in the Qaqortoq area, southern Greenland

Late Devensian and Holocene relative sea‐level changes on the Isle of Skye, Scotland, UK

The Storegga tsunami along the Norwegian coast, its age and run up

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