Variations in the pattern and rate of isostatic uplift indicated by a comparison of Holocene sea-level curves from Scotland

ABSTRACTMicrofossil (pollen and diatom) evidence is presented from sites in the Forth valley, south-central Scotland, where alternating organic and estuarine minerogenic deposits record the influence of the changing Holocene sea level. Radiocarbon dating confirms the age of the Main and Low Buried Beaches, and of the Main Postglacial Transgression, in different parts of the Forth valley. Radiocarbon dates on shells from beds in the carse sediment and a Mesolithic shell midden near Grangemouth relate to the falling sea level in the 4th and 5th millennia BP. Sea-level curves are constructed for the western and eastern Forth valley.

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Late Glacial and Holocene shore-level changes in the Aarhus Bugt area, Denmark

Geological Survey of Denmark and Greenland Bulletin ◽

10.34194/geusb.v47.6530 ◽

2021 ◽

Vol 47 ◽

Author(s):

Ole Bennike ◽

Katrine Juul Andresen ◽

Peter Moe Astrup ◽

Jesper Olsen ◽

Marit-Solveig Seidenkrantz

Keyword(s):

Sea Level ◽

Lake Level ◽

Late Glacial ◽

Relative Sea Level ◽

Mean Sea Level ◽

Shore Level ◽

Level Curves ◽

Isostatic Uplift ◽

Northern Regions ◽

Late Glacial And Holocene

We propose a new relative shore-level curve for the Aarhus Bugt area, an embayment in eastern Jylland, Denmark, based on a compilation of published and new radiocarbon ages of organic material. Lakes existed in the area during the Late Glacial and Early Holocene. Lake level rose gradually until the region was inundated by the sea at c. 9000 cal. years BP. The relative sea level reached a high stand at about 6000 cal. years BP, when the local relative sea level was c. 3 m above present-day mean sea level. The Aarhus Bugt area was inundated by the sea later than the Limfjord area in northern Jylland, but earlier than the Lillebælt region in southern Denmark. The shore-level curves for these areas differ partly because the glacio-isostatic uplift was more pronounced in the Limfjord area than farther south and partly because the northern regions were inundated by the sea earlier than the southern areas.

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A mechanism for the formation of overconsolidated horizons within estuarine floodplain alluvium: implications for the interpretation of Holocene sea-level curves

Geological Society London Special Publications ◽

10.1144/gsl.sp.1999.163.01.16 ◽

1999 ◽

Vol 163 (1) ◽

pp. 197-215 ◽

Cited By ~ 1

Author(s):

Stephen Crooks

Keyword(s):

Sea Level ◽

Level Curves ◽

Holocene Sea Level

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Indications of Holocene sea-level rise in Beaver Lake, East Antarctica

Antarctic Science ◽

10.1017/s095410200700017x ◽

2007 ◽

Vol 19 (1) ◽

pp. 125-128 ◽

Cited By ~ 6

Author(s):

Bernd Wagner ◽

Nadja Hultzsch ◽

Martin Melles ◽

Damian B. Gore

Keyword(s):

Sea Level Rise ◽

Sea Level ◽

East Antarctica ◽

Relative Sea Level ◽

The Holocene ◽

Isostatic Uplift ◽

Beaver Lake ◽

Holocene Sea Level

A 100 cm long sediment sequence was recovered from Beaver Lake in Amery Oasis, East Antarctica, using gravity and piston corers. Sedimentological and mineralogical analyses and the absence of micro and macrofossils indicate that the sediments at the base of the sequence formed under glacial conditions, probably prior to c. 12 500 cal. yr BP. The sediments between c. 81 and 31 cm depth probably formed under subaerial conditions, indicating that isostatic uplift since deglaciation has been substantially less than eustatic sea-level rise and that large areas of the present-day floor of Beaver Lake must have been subaerially exposed following deglaciation. The upper 31 cm of the sediment sequence were deposited under glaciomarine conditions similar to those of today, supporting geomorphic observations that the Holocene was a period of relative sea-level highstand in Amery Oasis.

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