Preparation of a candlestick-shaped stalagmite’s digital 3d shape

Dóra, Rábai and Tamás, Bazsó and Sándor, Szalai and Brolly, Gábor (2025) Preparation of a candlestick-shaped stalagmite’s digital 3d shape. GEOSCIENCES AND ENGINEERING: A PUBLICATION OF THE UNIVERSITY OF MISKOLC, 12 (2). pp. 70-81. ISSN 2063-6997

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Abstract

Tall stalagmites, also known as candlestick stalagmites, are considered vulnerable, since their break has a relatively high probability in the event of an earthquake. Their existence has implications on the maximum magnitude of recent earthquakes, which highlights the importance of recording their dimensions and shape accurately. This study introduces the acquisition and processing of terrestrial laser scanner data over the tallest and most vulnerable stalagmite in the Plavecká priepast (Detrekői-zsomboly) in the Little Carpathians (Slovakia). In addition, the 3D point cloud that was captured from three scan positions in 2024 was compared to a TIN model representing an earlier state of stalagmite dated back to 2015. The comparison of the present 3D point cloud and the former TIN model provides information not only on the temporal change of the stalagmite over the past nine years, but also on the discrepancies between the two surveys taken at the different epochs.

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