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