Abstract
In the quarry at Pisky, 30 km south of Lviv, due to weathering (hydration) of anhydrite (CaSO4), and its transformation into gypsum (CaSO4•2H2O) the volume of the rock increases and the unique forms of relief form called the hydration domes. In the interiors of the growing domes chambers are formed that gradually transform into the caves called the hydration caves (or the swelling caves). At the same time the rocks dissolve and their surface is covered with rillenkarren. The unusual weathering and geomorphological processes taking place today require the accurate documentation and monitoring. In this paper we describe the optimum field methods used to document the zone of weathering. These methods include: method of benchmarks, method of 3D laser scanning, method of scanning with structured light LED, method of terrestrial photogrammetry, and the method of modelling of 2.5D objects using photogrammetry. We discuss the advantages and disadvantages of the methods used.
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