Stratygrafia holocenu jako interglacjału
Abstract
HOLOCENE AS INTERGLACIAL - PROBLEMS OF STRATIGRAPHY
Summary
The knowledge of Holocene stratigraphy is other than older geological stages. It is possible to know the complete facial variation of these generally undisturbed, surficial deposits and used dating methods enable the precise correlation. The mechanism of deposit origin could be followed but their course and intensity were changed by the growing human interference. This climate-stratigraphic division (ryc.) based on the sequence analysis of various type deposits. Beside the portition for Late Glacial (13–10.3 ka BP), Eoholocene (10.3¬–8.4 ka), Mezoholocene (8.4–5.0 ka) and Neoholocene (5.O-Recent) were distinguished more humid, shorter periods and longer, more dry ones (14). The analysis of Holocene geoecosystems indicates the coexistence of environments with various rate of changes. it is possible to prove the climate's role in their transformation. The lake environment records more precisely these changes. The lateral channel migration is visible in fluvial environment but in the vallies closed by continental ice the main erosion phase was placed at the pleniglacial end. In many environs the short phases with high frequency of extremal phenomena decide on sedimentation rate. The boundaries of the pollen assemblage zones are indistinct in reason of the forest ecosystem immobility. The destructive human activity is unparallel phenomenon in the interglacials – the role of the mechanical sedimentation with aggradation tendency growed up in place of the chemical-organic one.
Summary
The knowledge of Holocene stratigraphy is other than older geological stages. It is possible to know the complete facial variation of these generally undisturbed, surficial deposits and used dating methods enable the precise correlation. The mechanism of deposit origin could be followed but their course and intensity were changed by the growing human interference. This climate-stratigraphic division (ryc.) based on the sequence analysis of various type deposits. Beside the portition for Late Glacial (13–10.3 ka BP), Eoholocene (10.3¬–8.4 ka), Mezoholocene (8.4–5.0 ka) and Neoholocene (5.O-Recent) were distinguished more humid, shorter periods and longer, more dry ones (14). The analysis of Holocene geoecosystems indicates the coexistence of environments with various rate of changes. it is possible to prove the climate's role in their transformation. The lake environment records more precisely these changes. The lateral channel migration is visible in fluvial environment but in the vallies closed by continental ice the main erosion phase was placed at the pleniglacial end. In many environs the short phases with high frequency of extremal phenomena decide on sedimentation rate. The boundaries of the pollen assemblage zones are indistinct in reason of the forest ecosystem immobility. The destructive human activity is unparallel phenomenon in the interglacials – the role of the mechanical sedimentation with aggradation tendency growed up in place of the chemical-organic one.