A Lateglacial age for the Main Rock Platform, western Scotland

Stone, John O.; Lambeck, Kurt; Fifield, L.K.; Evans, John; Cresswell, Richard

doi:10.1130/0091-7613(1996)024<0707:alaftm>2.3.co;2

Cited by 61 publications

(73 citation statements)

References 21 publications

(27 reference statements)

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“…Sissons, 1974;Dawson et al, 1999). Cosmogenic exposure dating of the platform in Scotland also supports the YD age (Stone et al, 1996). However, along the southwest coast of Norway no distinct erosional features in bedrock are observed along the YD shoreline.…”

Section: Younger Dryas Shoreline Featuresmentioning

confidence: 77%

Calendar year age estimates of Allerød–Younger Dryas sea‐level oscillations at Os, western Norway

Lohne¹,

Bondevik²,

Mangerud³

et al. 2004

J Quaternary Science

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Abstract:A detailed shoreline displacement curve documents the Younger Dryas transgression in western Norway. The relative sea-level rise was more than 9m in an area which subsequently experienced an emergence of almost 60 m. The sea-level curve is based on the stratigraphy of six isolation basins with bedrock thresholds. Effort has been made to establish an accurate chronology using a calendar year time-scale by 14C wiggle matching and the use of time synchronic markers (the Vedde Ash Bed and the postglacial rise in Betula (birch) pollen). The sea-level curve demonstrates that the Younger Dryas transgression started close to the Allerød-Younger Dryas transition and that the high stand was reached only 200 yr before the Younger Dryas-Holocene boundary. The sea level remained at the high stand for about 300 yr and 100 yr into Holocene it started to fall rapidly. The peak of the Younger Dryas transgression occurred simultaneously with the maximum extent of the ice-sheet readvance in the area. Our results support earlier geophysical modelling concluding a causal relationship between the Younger Dryas glacier advance and Younger Dryas transgression in western Norway. We argue that the sea-level curve indicates that the Younger Dryas glacial advance started in the late Allerød or close to the Allerød-Younger Dryas transition.

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Section: Younger Dryas Shoreline Featuresmentioning

confidence: 77%

Calendar year age estimates of Allerød–Younger Dryas sea‐level oscillations at Os, western Norway

Lohne¹,

Bondevik²,

Mangerud³

et al. 2004

J Quaternary Science

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“…Stone et al (1996). removal Nishiizumi et al (1989Nishiizumi et al ( , 1991b, Brook et al (1996), Bruno et al Burial processes 14.…”

Section: Formation Of Wave-cut Platformsmentioning

confidence: 99%

Geomorphological applications of cosmogenic isotope analysis

Cockburn

Summerfield

2004

Progress in Physical Geography: Earth and Environment

148

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Cosmogenic isotope analysis involves the measurement of cosmogenic nuclides that have accumulated in the upper few metres of the Earth's surface as a result of interactions between cosmic rays and target elements. The concentrations of these cosmogenic nuclides can provide quantitative estimates of the timing and rate of geomorphic processes. In dating applications the concentration of cosmogenic nuclides is interpreted as reflecting the time elapsed since a surface exposure event. However, over most of the Earth's surface for most of the time the landsurface experiences incremental denudation and in these circumstances cosmogenic nuclide concentrations are related to the rate of denudation. Applications of event dating using cosmogenic isotopes include constructional landforms such as volcanic and depositional features, fault displacement, meteorite impacts, rapid mass movement, bedrock surfaces rapidly eroded by fluvial or wave action or exposed by glacial retreat, and the burial of sediment or ice. Strategies for quantifying rates of incremental change include estimates of denudation rates from site-specific samples and from fluvial sediment samples reflecting catchment-wide rates, and measurements of cosmogenic nuclide concentrations in soils and regolith to quantify rates of rock weathering. The past decade has seen a rapid growth in applications of cosmogenic isotope analysis to a wide range of geomorphological problems, and the technique is now playing a major role in dating and quantifying rates of landscape change over timescales of several thousands to several millions of years.

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Section: Introduc�onmentioning

confidence: 99%

“…Since they can rarely be dated directly, these erosional features are usually interpreted in the light of associated sedimentary deposits and/or by correla�on with other features of inferred equivalent age, although this reasoning some�mes becomes circular (Devoy, 1983). One par�cular challenge is dis�nguishing whether a rock pla�orm is gene�cally linked to the most recent phase of RSL change, or is in fact inherited from an earlier RSL phase (or phases) (Young and Bryant, 1993;Brooke et al, 1994;Stone et al, 1996; Trenhaile et al, 1999;Trenhaile, 2002Trenhaile, , 2010 Blanco Chao et al, 2003;McKenna, 2008).Recent studies using a mathema�cal wave-erosion model have simulated the development of rock shore pla�orms and examined their morphology in rela�on to contras�ng pa�erns of RSL change during the Holocene (Trenhaile, 2008(Trenhaile, , 2010. In this paper, we apply this modelling approach to simulate rocky shoreline development along the northern coast of Ireland.…”

mentioning

confidence: 99%

Modelling the development of rocky shoreline profiles along the northern coast of Ireland

2013

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Modelling the Development of Rocky Shoreline Profiles along the Northern Coast of IrelandEmail: robin.edwards@tcd.ie AbstractA mathema�cal wave-erosion model is used to simulate postglacial shoreline profiles along the rocky, high energy coast of the north of Ireland. The wave erosion model is driven by a suite of rela�ve sea-level (RSL) curves for the last 16,000 years produced from four glacial rebound models. Mul�ple runs are performed with different ini�al shore profiles and rock resistances to inves�gate shoreline evolu�on and the significance of inherited morphology on the resultant profile shape. The simulated profiles are then compared with mapped profiles from three areas of the north of Ireland with different lithological and hydrographic proper�es.Modelled profiles generally replicate the overall mean shoreline gradients observed across the region when rock resistance is rela�vely high and erosion rates correspondingly low. In these profiles, breaks in mean slope are observed at depths comparable to the RSL minima in several of the RSL scenarios (at c. -10m, -15m and -20m for North Antrim, Derry and Donegal respec�vely). At Portrush and Portballintrae (Derry), profiles may be influenced by structural controls rela�ng to the underlying basalt surface and the removal of overlying glaciogenic sediments.All RSL scenarios replicate the observed eastward increase in cliff-pla�orm junc�on height, reflec�ng the differen�al glacioisosta�c rebound experienced along the coast. However, the precise eleva�on at which the simulated cliff base occurs is sensi�ve to the choice of RSL scenario, sugges�ng that this parameter may prove useful in evalua�ng glacial rebound model performance. Several of the RSL scenarios generate raised shore pla�orms or terraces in North Antrim and Derry at heights comparable to raised shoreline features reported in the literature. However, no single curve or combina�on of parameters is capable of genera�ng the range of pla�orm and terrace features observed in the bathymetric and topographic data. These misfits are consistent with the idea that many rock pla�orm or terrace features are inherited from an earlier phase or phases of RSL.Keywords: wave erosion, model, rela�ve sea level, rock coast, shore pla�orms, marine terraces, IrelandAbbrevia�ons: Rela�ve Sea Level (RSL); Joint Irish Bathymetric Survey (JIBS); Digital Eleva�on Model (DEM); mean high water spring �de (MHWS), mean high water neap �de (MHWN), mid-�de (MT), mean low water neap �de (MLWN), and mean low water spring �de (MLWS); Ordnance Datum Malin Head (OD) This is the author's final copy of a published manuscript made available via Trinity's Access to Research Archive (TARA). This item is protected by original copyright. For full details visit the TARA website at www.tara.tcd.ie Author's Final Copy Available via Trinity College Dublin's Open Access Repository (www.tara.tcd.ie) 2 Introduc�onThe high energy, wave dominated coastline of the north of Ireland comprises rocky cliffs and shore pla�orms, commonly associated with g...

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A Lateglacial age for the Main Rock Platform, western Scotland

Cited by 61 publications

References 21 publications

Calendar year age estimates of Allerød–Younger Dryas sea‐level oscillations at Os, western Norway

Calendar year age estimates of Allerød–Younger Dryas sea‐level oscillations at Os, western Norway

Geomorphological applications of cosmogenic isotope analysis

Modelling the development of rocky shoreline profiles along the northern coast of Ireland

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