Transcript Loess-Palaeosol Successions, southern and central Russian Plain: Generally drier, cooler Interglacials N. Catto, A.

Loess-Palaeosol Successions,
southern and central Russian Plain:
Generally drier, cooler Interglacials
N. Catto, A. Velichko
Dept of Geography, Memorial University of Newfoundland,
St. John’s, Canada [email protected]
Institute of Palaeogeography, Russian Academy of Sciences, Moscow,
Russian Federation
Modern Soil
Exposure 1
Mezin Palaeosol Complex, PC 1
Exposure 2
Kamenka Palaeosol Complex, PC 2
Exposure 3
Figure 2A
Figure 2B
Inzhavino Palaeosol Complex, PC 3
Exposure 4
Vorona Palaeosol Complex, PC 4
Exposure 5
Exposure 6
Exposure 7
Semybalki Exposure, Sea of Azov coastline
Covered
Mezin, MIS 5.5
Kamenka, MIS 7
Inzhavino, MIS 9
Vorona, MIS 11
Vorona palaeosol
complex
- calcareous
concretions;
overprinting
- cutans & Fe-oxides
- crotovinas
Inzhavino
palaeosol
complex
- post-depositional
vertical fracturing
Mikulino (Mezin)
Inzhavino (Likhvin)
Kamenka
Vorona (Muchkap)
Fig.
12. Progressive
of types ofprocesses
soil-forming
with time.
Progressive
shift ofshift
soil-forming
withprocesses
time, Semybalki
and Port-Katon
Soil types
Soil Complex
Contemporary
(Holocene)
PC1 Mikulino
Interglacial
PC2 Kamenka
Interglacial
PC3 Likhvin
Interglacial
PC4 Muchkap
Interglacial
Chernozem
(w. frost
features)
Chernozem
(leached)
Eluviated &
Gleyed
Elvuiated
Chernozem- Kastenozem
Luvisol
Semiarid
Subtropical
soil
0m
1
2-4
3
5e
6
8
7
10 m
10
9
11
12+
Port Katon
Korostylievo
Cromerian
Mikhailovka
Composite
Interglacials & interstadials italicized
Semybalki
Composite
Palaeosol
Loess
Fluvial Sand
Don Glacial Diamicton
Cromerian Marine Sand
Cromerian Marine Silt
Paleogene
Northward Transitions

Vorona (Muchkap)
- semi-humid subtropical Mediterranean & kastenozems in Azov region
- transitional to chernozems, & to luvisolic soils in central Don River Basin

Inzhavino (Likhvin)
- strongly preserved chernozemic characteristics in Azov exposures
- northward through drier, cooler prairie chernozems to luvisols

Kamenka (MIS 7)
- luvisols, dark grey chernozems, and gleysols in Azov exposures
- Northward transition to soils indicative of cooler, drier conditions
Korostylievo
Northward
Transitions:
Mikukino
Mikhailovka
Port-Katon
Gololobova
Progressive increasing
influence of frost action
follows both temporal and
northward trends
Summary




Progressive shift towards cooler, drier
conditions in Azov exposures over time
Similar northward shift in exposures along
transect
Increasing dominance of westerly over
southerly air flow patterns
Compatible with MIS 5.5-1 successions in
Siberian exposures