ABSTRACT Sedimentary successions in small coastal lakes situated from 0 to 11 m above the 7000 year BP shoreline along western coast of Norway, contain a distinctive deposit, very different sediments and below. The deposit is interpreted be result tsunami inundating lakes. An erosional unconformity underlies facies traced throughout basins, with most erosion found at seaward portion lowermost graded or massive sand that locally contains marine fossils. thins decreases grain size landward...

The statigraphy in 25 coastal lakes shows that most of the Norwegian coastline was impacted by a large tsunami about 7200 14 C BP. methodology has been to core staircase lake basins above contemporary sea level several areas and map deposit its maximum elevation. identified sedimentary record as an erosional unconformity overlain graded or massive sand with shell fragments, followed redeposited organic detritus. greatest recorded runup along coast (10–11 m high tide) is found proximal...

Estimates of the radiocarbon age seawater are required in correlations between marine and terrestrial records late Quaternary climate. We radiocarbon-dated shells plant remains deposited two bays on Norway's west coast 11,000 14,000 years ago, a time large abrupt climatic changes that included Younger Dryas (YD) cold episode. The difference plants showed sea surface reservoir ages increased from 400 to 600 early YD, stabilized for 900 years, dropped by 300 within century across YD-Holocene...

One of the largest Holocene sub‐marine slides mapped on Earth is Storegga slide offshore Norway [ Bugge , 1987] (Figure 1). Approximately 3500 km 3 material slid out and generated a huge tsunami dated to about 7300 14 C yr BP Bondevik et al ., 1997a], or ca 8150 calendar years BP. The known from onshore deposits in Faroe Islands Grauert 2001], Scotland Dawson 1993]. Of these, western reaches highest elevation, indicating runup 10–12 m. In this article, we demonstrate that at Shetland between...

Abstract Landslides are the second most important cause of tsunamis after earthquakes, and their potential for generating large depend on slide process. Among world's largest submarine landslides is Storegga Slide that generated a tsunami over an ocean‐wide scale, while no traces from similar nearby Trænadjupet have been found. Previous models such landslide not able to capture complexity processes at odds with geotechnical geomorphological data reveal retrogressive development. The...

The 8200-year BP cooling event is reconstructed in part from sediments the Norwegian and North Seas. Here we show that these have been reworked by Storegga tsunami - dated to coldest decades of 8.2 ka event. We simulate maximum flow velocity be 2-5 m/s on shelf offshore western Norway shallower Sea, up about 1 down a water depth 1000 m. re-investigate sediment core MD95-2011 found cold-water foraminifera layer re-deposited 11,000 years age. Oxygen isotopes recycled might led an...

A shallow marine Late Weichselian deposit on the outer coast of western Norway contains both terrestrial plant material and articulated shells. We have 14 C dated types from eight different stratigraphic levels covering time interval 12,300 to 11,100 yr B.P. The difference between C-dated shell (the reservoir age) ranges 200 525 yr, with a weighted average 380 ± 32 yr. This is almost identical present age 379 20 for southern Norway. In mid-Younger Dryas (YD) in North Atlantic (55°N–65°N) was...

Presumed deposits of the Storegga tsunami have been recognized in a coastal lake situated 4 m a.s.l. on island Suouroy, Faroe Islands. The stratigraphy reveals major erosion and redepositional event. deposited material ranges from sand sandy gyttja, with marine shell fragments foraminifera, to gyttja rip‐up clasts, wood thin layers. Diatom analysis indicates that deposit contains 5–8% polyhalobous (full marine) species, decreasing 1–2% undisturbed lacustrine above. event was dated some time...

Abstract Deposits in coastal lakes northernmost Norway reveal that the Storegga tsunami propagated well into Barents Sea ca. 8100–8200 years ago. A deposit – found cores from five located near North Cape Finnmark rests on an erosional unconformity and consists of graded sand layers re‐deposited organic remains. Rip‐up clasts lake mud, peat soil suggest strong erosion floor neighbouring land. Inundation reached at least 500 m inland minimum vertical run‐up has been reconstructed to 3–4 m. In...

Four relative sea-level curves from Edgeoya and Barentsoya are constructed based on 81 radiocarbon age determinations carefully selected levelled samples in raised beaches, mostly driftwood embedded beach gravel. All the dates, covering period deglaciation to present, calibrated calendar years, defined by fitting data with a least square regression curve. The dates internally very consistent, results some of most precise Arctic. four quite similar, marine limit at 85-90 m a.s.l. they show...

The common mussel Mytilus edulis is an indicator of milder marine conditions in the Arctic, with stronger Atlantic Water influx, during Holocene and earlier interglacials. Twelve radiocarbon dates mytilus from eastern Svalbard fall between ca 8800 5000 BP roughly delimit climatic optimum period there. beginning this east coincides immigration boreal extralimital molluscs to western Svalbard, indicating culmination influence.

This paper highlights the similarity in timing between 8.2 ka cold event across North Atlantic region and one of world’s largest underwater slides, Storegga submarine landslide that took place on continental slope west Norway. We argue basis a reinterpretation age tsunami deposits date slide, as well published ages sediment directly resting upon slide surface, occurred 8100 8200 cal. yr, near end event. Because exposed at base contained less methane-gas-hydrate c. years ago than exists today...

Many coastal lakes were inundated by both the Storegga tsunami (7000 14C yr BP) and mid-Holocene sea-level rise (the Tapes transgression) in western Norway. The eroded lake bottoms deposited graded and/or massive beds of sand, rip-up clasts, coarse plant material. By contrast, when rising sea entered lakes, it only gyttja, silt fine without causing much erosion underlying sediments. deposits some interpreted previously as ordinary marine sediments from transgression. Our reinterpretation...

Research Article| September 01, 2001 Rapid resetting of an estuarine recorder the 1964 Alaska earthquake Brian F. Atwater; Atwater 1U.S. Geological Survey at Department Earth and Space Sciences, University Washington, Seattle, Washington 98195-1310, USA Search for other works by this author on: GSW Google Scholar David K. Yamaguchi; Yamaguchi 25630 200th Street S.W., #202B, Lynnwood, 98036-6260, Stein Bondevik; Bondevik 3Department Geology, Tromsø, N-9073 Norway Walter A. Barnhardt;...

Abstract Seismic waves of the giant 2011 Tohoku earthquake triggered seiches in western Norwegian fjords. The seiching began a half hour after origin time. oscillations were noted by eyewitnesses and recorded surveillance cell phone cameras. observations show maximum trough‐to‐peak amplitudes 1.0–1.5 m periods 67–100 s. water not from arrival surface waves, timing inferred for other seiches. Instead, during passage horizontal S waves. We reproduced wave trigger means shallow‐water model...

Articulated molluscs, sea urchins and barnacle fragments close to the Vedde Ash Bed in a shallow marine deposit on west coast of Norway have been 14C dated. The weighted mean four dates from sediment slice 8 cm thick centred is 10920 ± 24 yr BP. most accurate age terrestrial plant macrofossils 10310 50 difference reservoir for coastal water at during mid-Younger Dryas equals 610 55 yr. This 230 older than Bølling/Allerød present day this area. result supports earlier conclusions higher...