Late Quaternary glacial history of the Hermitage area of southern Newfoundland

Leckie, Dale A.; McCann, S. B.

doi:10.1139/e83-038

Cited by 5 publications

(4 citation statements)

References 11 publications

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“…In contrast the upper bench is highly dissected, resembling the surrounding countryside developed in similar bedrock, and the backing cliff is indistinct in many places. There are no glacial deposits or indications of glacial erosion on either bench and the area is considered to have been ice-free during the Late Wisconsinan (LECKIE, 1979). The lack of dissection of the lower bench, which is present at similar elevations at various localities as far east as English Harbour West (sites 65 and 66), and the preservation of sea stacks, caves and notches, indicate that it represents a recent episode of marine erosion.…”

Section: Marine Benchesmentioning

confidence: 99%

“…The datum is higher, high water level This last event was represented in the southern part of the Hermitage area by mountain ice caps, with outlet glaciers which reached parts of the Fortune Bay coastline, and in the northern part by the incursion of Newfoundland-centred ice (LECKIE, 1979). The correlation of the northern Hermitage and Gisborne Basin ice marginal positions (McCANN, LECKIE and TUCKER, 1980) shown in Figure 3, is allied to the suggestion (TUCKER and McCANN, 1980) that JENNESS' (1960) interpretation of glacial limits in eastern Newfoundland is more appropriate than GRANT'S (1977) reconstruction.…”

Section: Figure 2 Elevations Of Raised Marine Benches In the Burin-hmentioning

confidence: 99%

“…It is evident that a distinction must be made between marine benches, which predate at least one period of widespread glaciation because they are cut in bedrock and overlain by glacial deposits, and beach deposits and terraces cut in unconsolidated materials which are of late-or post-glacial age. However, prior to our investigations (TUCKER 1976, 1979 a andTUCKER and McCANN, 1980;LECKIE, 1979;LECKIE and McCANN, in press) there had been no concerted effort to measure the elevations and examine the morphologic and stratigraphie relations of the various shoreline fragments with a view to elucidating the relationships between former sea levels and ice limits throughout this part of Newfoundland.…”

Section: Introductionmentioning

confidence: 99%

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Raised Shoreline Phenomena and Postglacial Emergence in South-Central Newfoundland

Tucker¹,

Leckie²,

McCann³

2007

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Two types of raised marine shoreline features occur in the Burin-Hermitage area of southern Newfoundland marine benches cut in bedrock, and terraces and beaches developed in unconsolidated materials. Most of the benches are older than Late Wisconsinan, and a horizontal rock shoreline at 4.5 ± 1.5 m, which occurs throughout the region, was probably formed in the last interglacial period. Raised deltas and coastal outwash deposits graded to former sea level positions, which define the Late Wisconsinan marine limit across the northern part of the study area, are correlated with terraces and raised beaches further south on the Burin Peninsula. The elevations of these features are used to define the regional pattern of postglacial emergence. More than 30 m of emergence has occurred in the northwest, but the extreme southern part of the region is undergoing submergence.

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Section: Marine Benchesmentioning

confidence: 99%

Section: Figure 2 Elevations Of Raised Marine Benches In the Burin-hmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Raised Shoreline Phenomena and Postglacial Emergence in South-Central Newfoundland

Tucker¹,

Leckie²,

McCann³

2007

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“…1), undertaken as part of a Quaternary mapping project (LECKIE, 1979), revealed the occurrence of small-scale, active, sorted circles and stripes. They occur at all elevations down to a few meters above sea level in the southern part of the area, but none were observed in the Bay d'Espoir -Little River region to the north.…”

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Active, Small-Scale, Periglacial Features on the South Coast of Newfoundland

Leckie¹,

McCann²

2007

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Small-scale, patterned ground is currently forming on the south coast of Newfoundland. Small, sorted circles and stripes form in the vicinity of the coast under the influence of marine climate with numerous, short duration, freeze-thaw cycles, high humidity, abundant rainfall and a thin snow cover throughout the winter, inland, no more than 15 to 25 km from the coast, the marine influence has decreased sufficiently that the patterned ground is no longer forming.On trouve présentement des sols structurés à petite échelle en formation sur la côte sud de Terre-Neuve. De petits cercles et des traînées minérales se développent près de la côte sous l'influence du climat maritime, caractérisé par plusieurs cycles de gel-dégel, une humidité relative élevée, des pluies abondantes et une mince couverture de neige, pendant l'hiver. À l'intérieur des terres, à 15-25 km de la côte tout au plus, l'influence maritime est suffisamment amoindrie pour qu'il n'y ait plus formation de sols structurés

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Relative sea‐level history and isostatic rebound in Newfoundland, Canada

Liverman

1994

Boreas

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The island of Newfoundland, Canada, is situated close to the former margins of the Laurentide ice sheet. The post‐glacial sea‐level history is complex, dominated by the effects of an ice‐marginal crustal forebulge produced by isostatic deformation of the lithosphere. Marine fossils found above present sea‐level can be 14C dated, and examination of the temporal and geographical distribution of these 14C dates in combination with geomorphological indicators of past sea‐levels indicates regional trends of relative sea‐level change. For most of the island (apart from the Northern Peninsula) no samples have been recovered that date younger than 8000 BP. suggesting that sea‐level lay below the present one in these areas for the last 8000 years. The same areas commonly show geomorphological evidence for stands of sea‐level both above and below present sea‐level. This evidence is interpreted as showing that over most of Newfoundland, following deglaciation, sea‐level fell to below present levels, and subsequently rose to the modern level. Exceptions to this pattern are the north of the Northern Peninsula, which shows a history of continuous emergence, or a more complex pattern of sea‐levels falling below present, subsequently rising above present, and currently falling; and the northeast Avalon Peninsula, which may have had sea‐levels below present throughout post glacial times. This pattern of relative sea‐level change is interpreted as being mostly due to isostatic recovery, with the main factor being northerly migration of the forebulge. Mapping the time at which sea‐level fell below the present level allows estimation of the rate of northerly migration and collapse of the forebulge at between 4.5 and 11 km/100 years; this is considerably faster than previous estimates.

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Late Quaternary glacial history of the Hermitage area of southern Newfoundland

Cited by 5 publications

References 11 publications

Raised Shoreline Phenomena and Postglacial Emergence in South-Central Newfoundland

Raised Shoreline Phenomena and Postglacial Emergence in South-Central Newfoundland

Active, Small-Scale, Periglacial Features on the South Coast of Newfoundland

Relative sea‐level history and isostatic rebound in Newfoundland, Canada

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