Lateglacial and early Holocene vegetation ... - geo.edu.ro

L. Bj .orkman et al. / Quaternary Science Reviews 21 (2002) 1039–1059 1053
Table 4 (continued)
Zone
Depth
(m)
Age
(cal. years BP)
Description
Inferred local upl<strong>and</strong>
<strong>vegetation</strong>
Correlation with
Preluca
Tiganului
Ulmus. Compared to the preceding
zone, Pinus, Juniperus, Poaceae
undiff. o40 mm, Artemisia,
Chenopodiaceae <strong>and</strong>
Cyperaceae have increased, while
Betula <strong>and</strong> Picea <strong>and</strong> have
decreased
S7, Pinus–
Betula–Alnus
LPAZ
4.69–4.59 11,500–11,250 High pollen percentages for Pinus
(35–40%), fairly high percentages
for Betula (c. 15%), Alnus (10–
20%), Poaceae undiff. o40 mm<strong>and</strong>
Artemisia, <strong>and</strong> low, but significant
values for Ulmus, Cyperaceae <strong>and</strong>
Chenopodiaceae. Picea <strong>and</strong> Salix
have significant occurrences.
Presence of scattered pollen
grains of Quercus <strong>and</strong> Juniperus.
Compared to the preceding zone,
Betula, Alnus <strong>and</strong> Ulmus have
increased, while Pinus, Juniperus,
Artemisia <strong>and</strong> Chenopodiaceae
have decreased. Ulmus
shows increasing values
throughout the zone (it starts
with very low values <strong>and</strong> ends
with c. 10%)
Open forest dominated by
Betula <strong>and</strong> Pinus.
Establishment <strong>and</strong> expansion
of Ulmus
P8
S8, Ulmus–
Pinus–Betula
LPAZ
4.59–4.36 11,250–10,750 Very high pollen percentages for
Ulmus (20–45%), fairly high
percentages for Pinus, Betula <strong>and</strong>
Picea, <strong>and</strong> low, but significant
values for Alnus, Poaceae undiff.
o40 mm<strong>and</strong> Artemisia. Fraxinus,
Quercus, Tilia, Salix <strong>and</strong>
Cyperaceae have significant
occurrences. Presence of scattered
pollen grains of Corylus <strong>and</strong>
Juniperus. Compared to the
preceding zone, Ulmus, Fraxinus,
Picea, Quercus <strong>and</strong> Tilia have
increased, while Alnus, Pinus,
Juniperus <strong>and</strong> Artemisia have
decreased. Fraxinus, Picea,
Quercus <strong>and</strong> Tilia are showing
increasing values throughout
the zone
Dense forest dominated by
Ulmus, but Picea, Betula <strong>and</strong>
Pinus were also common.
Establishment of Quercus, Tilia
<strong>and</strong> Fraxinus
P9
S9, Ulmus–
Picea–Fraxinus
LPAZ
4.36–3.98 10,750–10,200 Very high pollen percentages for
Ulmus (40–45%), fairly high
percentages for Picea, Pinus,
Betula, Fraxinus, Tilia <strong>and</strong>
Quercus, <strong>and</strong> low, but significant
values for Alnus, Corylus, Poaceae
undiff. o40 mm<strong>and</strong> Artemisia.
Salix, Cyperaceae <strong>and</strong>
Chenopodiaceae have significant
occurrences. Presence of scattered
pollen grains of Acer. Compared to
the preceding zone, Fraxinus, Tilia
<strong>and</strong> Quercus have increased, while
Dense forest dominated by
Ulmus, but Picea, Quercus,
Tilia <strong>and</strong> Fraxinus were also
common. Establishment of
Corylus <strong>and</strong> Acer
P10