In late August, 2025, a fieldwork campaign was organized in Obârșia Ialomiței Valley, Bucegi Mountains, at the site of the rock slope failure previously visited for absolute dating sampling. The purpose was to supplement the existing topographic data and to perform geophysical surveys on the deposit in order to derive information on its thickness and internal structure. A scan of the source-area was performed with a Leica P50 terrestrial laser scanner, resulting in a high-resolution surface model of the source rockwall. Electrical resistivity measurements of the deposit were performed in order to better assess the paleoenvironmental conditions during the rock slope failure occurrence. We made two profiles, one longitudinal and one transversal, in the lower sector of the deposit, situated on the left slope of Obârșia Ialomiței Valley. We used a Geolog2000 geophysical system with 50 electrodes, positioned each 4 m. We obtained 2 pseudosections, each measuring 196 m, which allowed evaluating the variations of electrical resistivity of the underground. In both profiles, at about 30 m depth, there is a significant drop in resistivity values that can be interpreted as either a lithological change, an increase of ground humidity, or it can represent the contact between a landslide body made of coarse materials and a relatively homogeneous layer such as bedrock.
