| Popis: |
Quaternary sediments are interpreted on the basis of investigations into the key section in Krems Region. Our studies were extended to a time period of the past 5 million years. During most of the last one million year the surrounding area was part of the continent as the sea regressed from its northern basin. The latter was filled up with sediments by Krems River and its tributaries. Winds had blown out fine grained material of these muddy and sandy deposits and transported it to the island. From the falling dust loess was formed in a thickness of 35–40 m. For a deeper understanding of the Krems layers the traditional sedimentological parameters (K, Sk, So, Md) were studied together with granulometric parameters newly introduced in Hungary: FG (fineness grade) adopted from Germany and Kd index (degree of weathering) adopted from China. Parameter values can be read from the profile below. In the course of data interpretation a wealth of information could be obtained on climate changes during the past two million years: extremes of warming and cooling by layers were fixed, lithological units, periods of and gaps in sedimentation identified, boundaries of layers drawn, in situ and redeposited sediments distinguished, circumstances of formation cleared up. |
