Relative sea-level fall since the last interglacial stage: Are coasts uplifting worldwide?

Pedoja, Kévin; Husson, Laurent; Regard, Vincent; Cobbold, P.R.; Ostanciaux, Emilie; Johnson, Markes E.; Kershaw, Stephen; Saillard, Marianne; Martinod, Joseph; Furgerot, Lucille; Weill, Pierre; Delcaillau, Bernard

doi:10.1016/j.earscirev.2011.05.002

Cited by 167 publications

(186 citation statements)

References 165 publications

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“…In other words, we first roughly classified the coastal sequences for active plate boundary vs "passive margin" s.l. (Pedoja et al, 2011a). With our new classification, large amounts of data (e.g.…”

Section: Apparent Uplift Rates and Geodynamicsmentioning

confidence: 99%

Coastal staircase sequences reflecting sea-level oscillations and tectonic uplift during the Quaternary and Neogene

Pedoja

Husson

Johnson

et al. 2014

Earth-Science Reviews

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This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research and education use, including for instruction at the authors institution and sharing with colleagues.Other uses, including reproduction and distribution, or selling or licensing copies, or posting to personal, institutional or third party websites are prohibited. Many coasts feature sequences of Quaternary and Neogene shorelines that are shaped by a combination of sealevel oscillations and tectonics. We compiled a global synthesis of sea-level changes for the following highstands: MIS 1, MIS 3, MIS 5e and MIS 11. Also, we date the apparent onset of sequences of paleoshorelines either from published data or tentatively extrapolating an age for the uppermost, purported oldest shoreline in each sequence. Including the most documented MIS 5e benchmark, we identify 926 sequences out of which 185 also feature Holocene shorelines. Six areas are identified where elevations of the MIS 3 shorelines are known, and 31 feature elevation data for MIS 11 shorelines. Genetic relationships to regional geodynamics are further explored based on the elevations of the MIS 5e benchmark. Mean apparent uplift rates range from 0.01 ± 0.01 mm/yr (hotspots) to 1.47 ± 0.08 mm/yr (continental collision). Passive margins appear as ubiquitously uplifting, while tectonic segmentation is more important on active margins. From the literature and our extrapolations, we infer ages for the onset of formation for~180 coastal sequences. Sea level fingerprinting on coastal sequences started at least during mid Miocene and locally as early as Eocene. Whether due to the changes in the bulk volume of seawater or to the temporal variations in the shape of ocean basins, estimates of eustasy fail to explain the magnitude of the apparent sea level drop. Thus, vertical ground motion is invoked, and we interpret the longlasting development of those paleoshore sequences as the imprint of glacial cycles on globally uplifted margins in response to continental compression. The geomorphological expression of the sequences matches the amplitude and frequency of glacial cyclicity. From middle Pleistocene to present-day, moderately fast (100,000 yrs) oscillating sea levels favor the development of well identified strandlines that are distinct from one another. Pliocene and Lower Pleistocene strandlines associated with faster cyclicity (40,000 yrs) are more compact and easily merge into rasas, whereas older Cenozoic low-frequency eustatic changes generally led to widespread flat-lying coastal plains.

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Section: Apparent Uplift Rates and Geodynamicsmentioning

confidence: 99%

Coastal staircase sequences reflecting sea-level oscillations and tectonic uplift during the Quaternary and Neogene

Pedoja

Husson

Johnson

et al. 2014

Earth-Science Reviews

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171

195

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“…For this zone, we have limited data from Holocene terraces, but well-preserved Pleistocene terraces (Pedoja et al, 2006(Pedoja et al, , 2011 improve our conclusion about the general direction of vertical movement.…”

Section: Results: Holocene Vertical Deformation On the Kamchatsky Penmentioning

confidence: 99%

“…Uplift and exhumation rates on Kamchatsky Peninsula have been previously determined by mapping of Pleistocene terraces and by analysis of uplifted strata (Fedorenko, 1965;Erlikh et al, 1974;Freitag et al, 2001;Pedoja et al, 2006Pedoja et al, , 2011Pedoja et al, , 2013Pfl anz et al, 2013). According to Pleistocene terrace data, rates of coastal vertical movements on Kamchatsky Peninsula, averaged over a period of 120 k.y., range from 0.08 to 1.33 mm/yr (Pedoja et al, 2006).…”

Section: Vertical Displacementmentioning

confidence: 99%

“…2;Pedoja et al, 2006Pedoja et al, , 2011. The shape of coastal crosssectional profi les through these marine terraces depends on the rate and nature (gradual or discrete) of relative sea-level change.…”

Section: Holocene Marine Terracesmentioning

confidence: 99%

“…Globally, more work has been conducted on Pleistocene marine terraces generated during interglacial, global highstands of sea level (review in Pedoja et al, 2011), than on uplifted Holocene marine terraces, which are typically restricted to areas of active tectonics (Lajoie, 1986). Moreover, most work on Holocene terraces has focused on wave-cut platforms and emergent coral reefs, rather than on the type of wave-built terraces (platforms) that are common in the Kamchatsky fi eld area.…”

Section: Holocene Marine Terracesmentioning

confidence: 99%

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A nexus of plate interaction: Vertical deformation of Holocene wave-built terraces on the Kamchatsky Peninsula (Kamchatka, Russia)

Pinegina¹,

Bourgeois²,

Kravchunovskaya³

et al. 2013

Geological Society of America Bulletin

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International audienceKamchatsky Peninsula lies within a complex meeting place of tectonic plates, in particular, the orthogonal interaction of the west-moving Komandorsky Island block with mainland Kamchatka. Examining the Holocene history of vertical deformation of marine wave-built terraces along the peninsular coast, we differentiated tectonic blocks undergoing uplift and tilting separated by zones of stable or subsided shorelines. We analyzed ∼200 excavations along >30 coastal profiles and quantified vertical deformation on single profiles as well as along the coast using paleoshorelines dated with marker tephras. For the past ∼2000 yr, the average rates of vertical deformation range from about -1 to +7 mm/yr. Uplift patterns are similar to those detected from historical leveling and from mapping of the stage 5e Quaternary marine terrace (ca. 120 ka). Average vertical deformation in the Holocene is highest for the shortest studied time period, from ca. A.D. 250 to 600, and it is several times faster than rates for marine oxygen isotope stage (MIS) 5e terraces. Vertical displacements observed along the coast are most likely coseismic and probably have included subsidence as well as uplift events. Because subsidence is generally associated with erosion, almost surely more prehistoric large earthquakes occurred than are recorded as topographic steps in these terraces. We suggest that the distribution of coastal uplift and subsidence observed along the Kamchatsky Peninsula coastline is qualitatively explained by the squeezing of the Kamchatsky Peninsula block between the Bering and Okhotsk plates, and the Komandorsky Island block

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Passive margins getting squeezed in the mantle convection vice

et al. 2013

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[1] Passive margins often exhibit uplift, exhumation, and tectonic inversion. We speculate that the compression in the lithosphere gradually increased during the Cenozoic, as seen in the number of mountain belts found at active margins during that period. Less clear is how that compression increase affects passive margins. In order to address this issue, we design a 2-D viscous numerical model wherein a lithospheric plate rests above a weaker mantle. It is driven by a mantle conveyor belt, alternatively excited by a lateral downwelling on one side, an upwelling on the other side, or both simultaneously. The lateral edges of the plate are either free or fixed, representing the cases of free convergence, and collision (or slab anchoring), respectively. This distinction changes the upper mechanical boundary condition for mantle circulation and thus, the stress field. Between these two regimes, the flow pattern transiently evolves from a free-slip convection mode toward a no-slip boundary condition above the upper mantle. In the second case, the lithosphere is highly stressed horizontally and deforms. For a constant total driving force, compression increases drastically at passive margins if upwellings are active. Conversely, if downwellings alone are activated, compression occurs at short distances from the trench and extension prevails elsewhere. These results are supported by Earth-like models that reveal the same pattern, where active upwellings are required to excite passive margins compression. Our results substantiate the idea that compression at passive margins is in response to the underlying mantle flow that is increasingly resisted by the Cenozoic collisions.

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Relative sea-level fall since the last interglacial stage: Are coasts uplifting worldwide?

Cited by 167 publications

References 165 publications

Coastal staircase sequences reflecting sea-level oscillations and tectonic uplift during the Quaternary and Neogene

Coastal staircase sequences reflecting sea-level oscillations and tectonic uplift during the Quaternary and Neogene

A nexus of plate interaction: Vertical deformation of Holocene wave-built terraces on the Kamchatsky Peninsula (Kamchatka, Russia)

Passive margins getting squeezed in the mantle convection vice

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