Postglacial Vegetation, Climate History and Land-Sea Interaction at Island Lake, Baie des Chaleurs, New Brunswick, as Documented by Palynological Analysis

Mott, Robert; Jetté, Hélène; Guiot, Joël; Cloutier, André

doi:https://doi.org/10.7202/013112ar

Postglacial Vegetation, Climate History and Land-Sea Interaction at Island Lake, Baie des Chaleurs, New Brunswick, as Documented by Palynological AnalysisHistoire de la végétation postglaciaire, du climat et de l’interaction terre-mer au lac Island, baie des Chaleurs, Nouveau-Brunswick, établie à l’aide d’analyses polliniques[Plan complet de l’article]

Robert J. Mott,

Hélène Jetté,

Joël Guiot et

André Cloutier

…plus d’informations

Robert J. Mott
Geological Survey of Canada, 601 Booth Street, Ottawa, Ontario K1A 0E8
rjmott@gsc.nrcan.gc.ca
Hélène Jetté
Joël Guiot
CEREGE CNRS/Université Paul Cézanne UMR 6635, B 80, F-13545 Aix-en-Provence, France
André Cloutier
Geological Survey of Canada, 601 Booth Street, Ottawa, Ontario K1A 0E8

Introduction
Study Area
Methodology
- Palynological Analysis
- Paleoclimatic Reconstruction
Results
Discussion
Conclusion

Introduction

Study Area

Location

Climate

Postglacial History

Methodology

Palynological Analysis

Paleoclimatic Reconstruction

Results

Sediments

Radiocarbon Dating

Palynological Analysis

Zone 1 (735 to 657.5 cm; before 10 150 BP). Herb pollen zone. Brownish grey clay and laminated clay.

Zone 2 (657.5 to 637.5 cm; ca. 10 150 to 9920 ± 60 BP) Shrub pollen zone. Dark grey organic silty clay.

Zone 3 (637.5 to 627.5 cm; ca. 9920 to 9820 BP) Populus (poplar/aspen) pollen assemblage zone (Pioneer forest). Dark brown to black gyttja.

Zone 4 (627.5 to 610 cm; ca. 9820 to 9700 BP). Picea (spruce) pollen assemblage zone (Pioneer forest). Dark grey to black gyttja.

Zone 5 (610 to 580 cm; ca. 9700 to 9450 BP). Picea (spruce), Betula (birch) and Alnus (alder) pollen assemblage zone. (Open northern boreal forest). Black, finely laminated algal gyttja.

Zone 6 (580 to 470 cm; ca. 9450 to 8100 BP). Betula (birch), Alnus (alder) and Abies (fir) pollen assemblage zone (boreal forest).

Zone 7 (470 to 150 cm; ca. 8100 to ca. 2800 BP). Pinus, Betula and thermophilous taxa pollen assemblage zone (mixed coniferous-deciduous forest).

Zone 8 (150 cm to 0 cm; from ca. 2800 BP to the present). Betula (birch) and Fagus (beech) pollen assemblage zone (Mixed deciduous-coniferous forest).

Paleoclimatic Reconstruction

Discussion

Conclusion

Parties annexes

Introduction

Study Area

Location

Climate

Postglacial History

Methodology

Palynological Analysis

Paleoclimatic Reconstruction

Results

Sediments

Radiocarbon Dating

Palynological Analysis

Zone 1 (735 to 657.5 cm; before 10 150 BP). Herb pollen zone. Brownish grey clay and laminated clay.

Zone 2 (657.5 to 637.5 cm; ca. 10 150 to 9920 ± 60 BP) Shrub pollen zone. Dark grey organic silty clay.

Zone 3 (637.5 to 627.5 cm; ca. 9920 to 9820 BP) Populus (poplar/aspen) pollen assemblage zone (Pioneer forest). Dark brown to black gyttja.

Zone 4 (627.5 to 610 cm; ca. 9820 to 9700 BP). Picea (spruce) pollen assemblage zone (Pioneer forest). Dark grey to black gyttja.

Zone 5 (610 to 580 cm; ca. 9700 to 9450 BP). Picea (spruce), Betula (birch) and Alnus (alder) pollen assemblage zone. (Open northern boreal forest). Black, finely laminated algal gyttja.

Zone 6 (580 to 470 cm; ca. 9450 to 8100 BP). Betula (birch), Alnus (alder) and Abies (fir) pollen assemblage zone (boreal forest).

Zone 7 (470 to 150 cm; ca. 8100 to ca. 2800 BP). Pinus, Betula and thermophilous taxa pollen assemblage zone (mixed coniferous-deciduous forest).

Zone 8 (150 cm to 0 cm; from ca. 2800 BP to the present). Betula (birch) and Fagus (beech) pollen assemblage zone (Mixed deciduous-coniferous forest).

Paleoclimatic Reconstruction

Discussion

Conclusion

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