Ecostratigraphic and Paleomagnetic Studies of Late Quaternary Sediments On the Northeast Newfoundland Shelf

Mudie, Peta J.; Guilbault, J.-P.

doi:10.4095/119321

Cited by 10 publications

(13 citation statements)

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“…Our approach is thus statistical at this time, well as results in the literature (Fillon et al 1981; Andrews and but further work is required along the lines suggested in Mudie Short 1983). Rather than using classical least-squares reand Guilbault (1982): they attempted corrections based on the gression to develop a predictive model, we have used Tukey's relative contamination of a sample by pre-Quaternary palyresistant line analysis, as it is resistant to the effect of outliers morphs and graphite (see also Nambudiri et al 1980). (Velleman and Hoaglin 1981) and potential problems in small Figure 3 *Core locations and other details are given in Syvitski and Blakeney (1983) and Syvitski (1984).…”

Section: Results and Discussion Of Tams Datingmentioning

confidence: 99%

“…The magnitude of the + 1700 year error is vrobablv associated with the reworking of older marine and teiestrial *sediments (cf. Truswell andY Drewry 1984;Mudie and Guilbault 1982). We suggest that this reworking will diminish after ca.…”

Section: (S) and Organic Matter Dates (0) Ismentioning

confidence: 86%

“…Tables 1 and 3 list estimated "shell ages" for various dates obtained on organics using [I]. Figure 3 also indicates the I4C and corrected I4C dates discussed by Mudie and Guilbault (1982) and indicates that [I] approximates the corrected age reasonably well.…”

Section: (S) and Organic Matter Dates (0) Ismentioning

confidence: 95%

“…Pollen analysis of cores from these environments is important as an end in itself (Vilks and Mudie 1978;Mudie and Short 1985), but it also provides useful information on the degree of contamination (e.g., Mudie and Guilbault 1982). In addition to the examination of the pollen in core sediment, Mudie (e.g., Mudie and Short 1985;Mudie and Guilbault 1982) has shown that reworking of sediment can also be detected through an analysis of dinoflagellates. We have also noted Cretaceous foraminifera is some sections of cores.…”

Section: (S) and Organic Matter Dates (0) Ismentioning

confidence: 97%

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Sedimentation rates in Baffin Island fiord cores from comparative radiocarbon dates

Andrews¹,

Jull²,

Donahue³

et al. 1985

Can. J. Earth Sci.

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Five accelerator (TAMS system, University of Arizona) radiocarbon dates on small (30-50 mg) paired bivalves or shell fragments have been obtained on two piston cores. These dates are compared with conventional and accelerator I4C dates on the total organic fraction (<2 pm size fraction) from similar levels in the two cores. The shell dates are always younger by several thousands of years. We argue that the shell dates are the more reliable; for example, we demonstrate that pre-Quaternary pollen is abundant in the lowermost 6 m in core HU77-159 from Frobisher Bay. Since the occurrence of shells is rare in piston cores, we have developed an empirical relation that enables us to change dates on organic matter to a more probable "true" age. If this correction is applied to dates on the total organic fraction that we obtained on an additional five cores from fiord and shelf sites, a consistent pattern of sedimentation rate variations is shown. This indicates that sedimentation rates were highest between ca. 9000 and 6500 years BP, a time when fiord glaciers in Baffin lsland were undergoing substantial retreat.Cinq dkterminations d'lge au radiocarbone accC1krC (systkme TAMS, Universitk d'Arizona) sur des bivalves pairks ou des fragments de coquilles ont Ct C rCaliskes sur deux carottes prklevkes au moyen d'un kchantillonneur a piston. Ces Lges sont comparCs avec ceux obtenus par la technique conventionnelle et par le I4C acckltrk sur la matikre organique totale (fraction granulomktrique < 2 pm) pour les m6mes niveaux dans les carottes. Les Lges des coquilles donnent toujours des valeurs de plusieurs milliers d'ans plus jeunes. Nous Cvoquons que les Lges des coquilles sont plus fiables; par exemple, nous dkmontrons que le pollen antC-quaternaire est abondant dans les 6 derniers m de la carotte HU77-159 de la baie de Frobisher. Vu la presence rare des coquilles dans les tchantillons prklevks avec le carottier a piston, nous avons dO Claborer une relation empirique pennettant de modifier les Iges de la matikre organique pour obtenir un Ige plus prks de la rkalitk. Si cette correction est appliquke aux lges de la matikre organique totale qui ont Ct6 determines sur cinq carottes supplCmentaires prClevCs dans le fjord et sur le plateau, on voit apparaitre un motif cohtrent des variations des taux de skdimentation. Ceci rkvkle que les taux de stdimentation Ctaient plus ClevCs entre ca. 9000 et 6500 ans AvP, i un Cpisode oh les glaciers des fjords de l'ile de Baffin kgressaient substantiellement.[Traduit par le journal]

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Section: Results and Discussion Of Tams Datingmentioning

confidence: 99%

Section: (S) and Organic Matter Dates (0) Ismentioning

confidence: 86%

Section: (S) and Organic Matter Dates (0) Ismentioning

confidence: 95%

Section: (S) and Organic Matter Dates (0) Ismentioning

confidence: 97%

See 2 more Smart Citations

Sedimentation rates in Baffin Island fiord cores from comparative radiocarbon dates

Andrews¹,

Jull²,

Donahue³

et al. 1985

Can. J. Earth Sci.

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show abstract

“…Jennings, 1986;Andrews, 1987aAndrews, & 1987bAndrews et al, 1989). The problems of evaluating such dates are discussed in Fillon et al (1981), Mudie and Guilbault (1982), Andrews et al (1985aAndrews et al ( , 1986) and Short et al (in press). …”

Section: An Arctic Fiord Glacier Modelmentioning

confidence: 99%

Fiord to Deep Sea Sediment Transfers along the Northeastern Canadian Continental Margin: Models and Data

Andrews¹

2007

gpq

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In Alaskan fiords, sedimentation rates are high; during a glacial advance fiord-basin sediments are transported to the ice front to form a shoal which reduces the calving rate. Thus, during successive glacial cycles, sediment is initially stored and then removed from fiord basins. In the fiords of eastern Baffin Island sedimentation rates are, and were, much lower (< 1000 Kg/m2 ka). and fiord-basin fills may span several glacial cycles. This hypothesis is in keeping with the relatively low sedimentation rates on the adjacent shelf (50 to 500 kg/m2 ka) and deep-sea plain (< = 50 kg/m2 ka). The advance of outlet glaciers through these arctic fiords may be explained by the in situ growth of a floating ice-shelf, grounded at the mouth of the fiord. The extent of late Foxe Glaciation in McBeth and ltirbilung fiords can be delimited by raised marine deltas (50-85 m asl) with 14C dates on in situ shells and whalebone of >54 ka. Holocene raised beaches are lower and date <10 ka. These data, plus the absence of tills in raised marine sections along the outer coast, make it difficult to extend grounded ice onto the shelf during the 18 ka global maximum. Piston cores from Tingin. ltirbilung and McBeth fiords vary between 4 and 11 m in length, but only sample a proportion of the total basin-fills.

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New evidence for widespread mass transport on the Northeast Newfoundland Shelf revealed by Olex single-beam echo sounding

et al. 2011

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Ecostratigraphic and Paleomagnetic Studies of Late Quaternary Sediments On the Northeast Newfoundland Shelf

Cited by 10 publications

References 0 publications

Sedimentation rates in Baffin Island fiord cores from comparative radiocarbon dates

Sedimentation rates in Baffin Island fiord cores from comparative radiocarbon dates

Fiord to Deep Sea Sediment Transfers along the Northeastern Canadian Continental Margin: Models and Data

New evidence for widespread mass transport on the Northeast Newfoundland Shelf revealed by Olex single-beam echo sounding

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