Three‐fold subdivision of the Allerød chronozone

Riezebos, P. A.; Slotboom, R.T.

doi:10.1111/j.1502-3885.1984.tb01129.x

Cited by 16 publications

(5 citation statements)

References 12 publications

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“…The Pinus increase in the succeeding period (NTS-4) should be regarded as a delayed response to the prevailing dry conditions during zone NTS-3. Similar short lasting Pinus maxima at the base of the Allerod are found by Munaut & Paulissen (1973), De Smedt (1973 and Riezebos & Slotboom (1984). The increase of Pinus in zone NTS-4 may be considered a stage in the evolution of the vegetation succession succeeding the shrub tundra with Artemisia, Betula nana, Salix spp., via a phase with Juniperus and Hippophae to one dominated by tree birch (cf.…”

Section: Dating; Bio-and Chronostratigraphysupporting

confidence: 77%

Geomorphology and palaeoecology of the Mark valley (southern Netherlands): palaeoecology, palaeohydrology and climate during the Weichselian Late Glacial

Bohncke

Vandenberghe

Coope

et al. 1987

Boreas

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Bohncke, Sjoerd, Vandenberghe, Jef, Coope, Russell & Reiling, Rudo 1987 03 01: Geomorphology and palaeoecology of the Mark valley (southern Netherlands): palaeoecology, palaeohydrology and climate during the Weichselian Late Glacial. Boreas, Vol. 16, pp. 69–85. Oslo. ISSN 0300–9483. A backswamp peat, located on an Upper Pleniglacial terrace, has been analysed in detail with respect to its pollen content, its macroscopic plant remains and its fossil insect fauna. The analyses permitted a detailed reconstruction of the Late Glacial palaeoenvironment besides an estimation of fluctuations in the local humidity and fluctuations in the palaeotemperatures. The main boundaries in the sequence have been radiocarbon dated, indicating a peat accumulation from c.12,600 B.P. to 10,970 B.P. The Bölling s.l. shows a clear migration of vegetation belts, starting with a shrub vegetation and passing into a birch wood. This progressive vegetation development culminates in a short lasting Pinus maximum early in the Alleröd, without being hampered by events during the Older Dryas. Up to and including the Alleröd no serious climate deterioration is registered. The humidity curve reveals a semiterrestrial phase in the local hydrosere that correlates with the Older Dryas and that is explained by the geomorphological evolution of the adjacent river system. The transition to the Younger Dryas coincides with a return to fluvial conditions and a marked change in the pollen record and insect fauna, indicating a decline in the average July temperature from between 18 and 15°C to 11 and 10°C.

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Section: Dating; Bio-and Chronostratigraphysupporting

confidence: 77%

Geomorphology and palaeoecology of the Mark valley (southern Netherlands): palaeoecology, palaeohydrology and climate during the Weichselian Late Glacial

Bohncke

Vandenberghe

Coope

et al. 1987

Boreas

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“…The L5 oscillations are correlated with the minor Allerrad deteriorations at Sandvikvatn (S4b, S4d; Paus, 1988), and may parallel the two cooler Allerpld phases in northern Germany (Usinger, 1985). L5e like S4d (Paus, 1988), seems, in its way, congruent to the cooler phase within the tripartite Allercad elsewhere (Iversen, 1973;Pennington, 1975;Riezebos and Slotboom, 1984;Kristiansen etal., 1988).…”

Section: P a 2 16 I I B T A X A I P A 2 L6 I 4 N E W L A X A I P A 2 mentioning

confidence: 83%

Late Weichselian vegetation, climate, and floral migration at Liastemmen, North Rogaland, south‐western Norway

Paus

1989

J Quaternary Science

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“…The B~lling and Aller~d chronozones were originally defined as periods of relative warmth between colder phases, but they are no longer considered to be uninterrupted temperate intervals. Climatic cooling occurred near the end of the B~lling Chronozone during the Aegclsee oscillation (Lotter et al 1992); and the Allercird interval includes a pre-Younger Dryas cold phase that has been identified in lake sediments in Europe (Gerzensee oscillation ;Eicher & Siegenthaler 1976;Riezebos & Slotboom 1984) and eastern Canada (Killarney oscillation; Levesque et al 1993a, b), and in marine sediments from the Norwegian Sea (Karpuz & Jansen 1992).…”

Section: Cause Of the Advancrsmentioning

confidence: 99%

Pre‐Younger Dryas resurgence of the southwestern margin of the Cordilleran ice sheet, British Columbia, Canada

Clague

Mathewes

Guilbault³

et al. 1997

Boreas

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Clague, J. J., Mathewes, R. W., Guilbault, J.‐P., Hutchinson, I. & Ricketts, B. D. 1997 (September): Pre‐Younger Dryas resurgence of the southwestern margin of the Cordilleran ice sheet, British Columbia, Canada. Boreas, Vol. 26, pp. 261–278. Oslo. ISSN 0300–9483. A lobe of the Cordilleran ice sheet readvanced into the central Fvaser Lowland, southwestern British Columbia, Canada, on at least two occasions near the end of the last glaciation. This ice also flowed into the previously deglaciated, lower reaches of mountain valleys adjacent to the Fraser Lowland and into Washington state. The first of these advances occurred before about 11900 BP and ended with glacier retreat and the establishment of lodgepole pine forest on newly deglaciated terrain. Parts of this forest were overridden by ice during a second advance, shortly after 11300 BP. The younger advance is most likely older than the Younger Dryas Chronozone (11000–10000 BP) and may correlate with an intra‐Allerad cooling event (the Killarney‐Gerzensee oscillation). The older advance may have occurred during the Oldest Dryas or Older Dryas cold period. Non‐climatic factors could also be involved, as emergence of the Fraser Lowland before the older advance greatly reduced or eliminated calving at the glacier margin and thus altered the mass balance of the ice lobe.

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Three‐fold subdivision of the Allerød chronozone

Cited by 16 publications

References 12 publications

Geomorphology and palaeoecology of the Mark valley (southern Netherlands): palaeoecology, palaeohydrology and climate during the Weichselian Late Glacial

Geomorphology and palaeoecology of the Mark valley (southern Netherlands): palaeoecology, palaeohydrology and climate during the Weichselian Late Glacial

Late Weichselian vegetation, climate, and floral migration at Liastemmen, North Rogaland, south‐western Norway

Pre‐Younger Dryas resurgence of the southwestern margin of the Cordilleran ice sheet, British Columbia, Canada

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