Malacofauna of the Holocene tufa in the valley of the Ociemny Stream (Pieniny Mts., southern Poland)
Journal Title: Geology, Geophysics & Environment - Year 2017, Vol 43, Issue 1
Abstract
A rich molluscan fauna was found in the outcrop of slope sediments and calcareous tufas in the valley of the Ociemny Stream in the Pieniny Mts. The malacological sequence identified there represents the entire Holocene, but it contains several stratigraphical gaps. From this viewpoint, it is a unique finding within the area studied. In nine samples, 11,000 specimens of 71 species of molluscs were identified. The ecological and zoogeographical diversity of the composition and structure enabled the separation of three faunistic assemblages. The oldest assemblage (with Discus ruderatus) corresponds with the cold period of the Early Holocene and represents shadowed habitats overgrown with the coniferous forests of the taiga type. Its characteristic feature is the presence of glacial relics (e.g. Vertigo genesii and Vertigo geyeri). The other younger fauna (with Discus perspectivus) is typical of the humid and warm climate of the Atlantic Phase. It is characteristic of the habitats of mixed and deciduous forests. Numerous Balkan and Mediterranean thermophilous forms appear in this assemblage. The youngest malacoenosis (with Bithynella austriaca) is typical for the historical times. The particular intervals containing molluscan fauna are separated by gaps corresponding to the erosion phases. Because of the land relief in the valley of the Ociemny Stream, which is not conducive to the development of human economy, no marked anthropogenic deforestation occurs.
Authors and Affiliations
Witold Paweł Alexandrowicz
Keywords
Related Articles
- EP ID EP257385
- DOI 10.7494/geol.2017.43.1.5
- Views 45
- Downloads 0
The influence of root system on slope stability in the view of numerical analysis
The problem of slope stability is one of the most difficult issues, which constitutes the object of interest of engineering geology and geotechnics. The impact of vegetation, well developed bush root system in particular...
Land subsidence caused by solution mining in the Mogilno salt dome
Occurrence of land surface subsidence is a result of rock salt extraction. The process is observed by geodetic measurements. On the Palędzie I salt mining field, such measurements are conducted every five years. The most...
Rynek pojemności magazynowych na ropę naftową i paliwa ciekłe w Polsce - perspektywy rozwoju
The year 2012 was the first year in the past 12 years when the demand for liquid fuels dropped. That resulted in a decrease of demand for mandatory reserve storage capacity. A rapid growth of the demand for crude oil and...
Comparison of solutions for microseismic focal mechanism estimation
One of the major advantages of microseismic data, recorded during hydraulic fracturing of prospective shale intervals is ability to use both P and S wave in the analysis, not only to determine epicentral locations of eve...
Physicochemical and geotechnical properties of an ash-slag mixture deposited on a landfill in terms of its use in engineering
Coal combustion ash-slag mixtures have been deposited in landfills in Poland for decades. At the same time, there is a shortfall in the amount of available materials related to the construction and modernisation of trans...