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Application of ground penetrating radar to identification of thickness and structure of sediments in postglacial lakes, illustrated with an example of the Mały Staw lake (the Karkonosze Mountains)

Gądek B., Grabiec M., Kędzia S.

Studia Geomorphologica Carpatho-Balcanica

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2015

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Vol. 49

5--13

EN

This paper has been aimed at demonstrating the applicability of the ground penetrating radar to acquiring basic information on lake sediments and geomorphological conditions of their deposition in the basin of Mały Staw lake. The lake area is one of the most comprehensively studied part of the Polish part of the Karkonosze Mountains. The application of radar soundings enabled a fast and environmentally friendly verification as well as updating the results of previous research on the thickness and structure of the sediments of this glacial lake. Mały Staw lake is formed at the postglacial depression in the granite bedrock. The bottom of the lake is composed of limnic deposits of the maximum thickness reaching up to 15 m. The postglacial formations occurring below them probably contain a buried moraine of the youngest recessional phase. Solid rock is located about 25 meters beneath the current bottom of the lake.

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Are there any active rock glaciers in the Tatra Mountains?

Kędzia S.

Studia Geomorphologica Carpatho-Balcanica

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2014

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Vol. 48

5--16

EN

Research on rock glaciers have been conducted in the Tatra Mountains for about 100 years. About 30 years ago, there were papers suggesting that part of the Tatra rock glaciers was formed during the Little Ice Age. About 20 years ago, permafrost was discovered in the mountains. This discovery marked the beginning of research on the activity of rock glaciers. Ten years ago, a study was carried out on the rock glacier near the Velké Hincovo Pleso lake, which excluded any activity of this glacier in the last few hundred years, despite the high probability of the existence of permafrost in it. The following paper presents the results of lichenometric dating conducted for the activity of rock glaciers in the Świstówka Roztocka and the Buczynowa valleys.

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Geomorphological and Geophysical Studies in a Subarctic Environment of Karkevagge Valley, Abisko Mountains, Northern Sweden

Baumgart-Kotarba M., Kędzia S., Kotarba A., Mościcki J.

Bulletin of the Polish Academy of Sciences. Earth Sciences

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2001

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Vol. 49, nr 2

123-135

EN

A detailed geomorphological map of the Karkevagge valley (Northern Sweden), combined with geophysical soundings, provides quantitative measures of landforms and deposits within this most typical alpine valley in the Scandinavian Mountain range. Asymmetric development of the Karkevagge slopes during postglacial time, well documented on geomorphological map, appears to have been connected to the dominant westerly winds and precipitations. Geoelectical survey proves, that during final stage of the last glaciation, a considerable erosion by cirque and valley glaciers, took place. An effect of selective glacial overdeepening is evidenced on a cross-profile at the junction of two descending (Rissajaure and Karkereppe) glaciers. Geophysical soundings support Anders Rapp's hypothesis of 1992 concerning conservation of cold-based ice glacial on summit plateaus, and simultaneous, strong glacial erosion due to wet-based ice flow in cirque glaciers and glacial troughs.