## 6 Conclusions  
Magnetic susceptibility measurements in Croatian cave sediments of the Dinaric Karst are possible to detect in situ, and significant changes are likely to be obtained along sediment profiles in such environments. Magnetic susceptibility measurements along one profile in Slovacka Cave at northern Velebit Mountain, and along two profiles in the Crnopac Cave System (the former Kita Gacesina Cave, southern Velebit Mt.) showed variations attributed to changes in the mineral composition of the sediment, determined by XRD analysis. A comparison of magnetic susceptibility values and the results obtained by XRD analysis showed that a correlation of sediment composed of metallic ions bearing minerals corresponded well with measured magnetic susceptibility values higher than 50 \(\times\) 10\({}^{-5}\) SI units. Sediments composed mainly of diamagnetic minerals (i.e., calcite and quartz) showed magnetic susceptibility values lower than 40 \(\times\) 10\({}^{-5}\) SI units. Changes in magnetic susceptibility and the presence of minerals with magnetic characteristics in the sediments may be the result of various source material in the sediments, as well as evidence of climate changes during sediment deposition. Measurements with the Bartington MS2B device obtained precise and accurate results that were reliable for interpretation, while measurements with the Kappameter KM-7 device obtained satisfactory preliminary field results that were partly comparable to MS2B measurements and highly dependent on the design of the measurement along the profiles and especially on the rate of weathering on site. In the future, extensive investigations, combined with field and laboratory analysis, should be performed on the several-meter long soft sediment profiles, applying dense sampling and measurement design. The following supporting information can be downloaded at: [[https://www.mdpi.com/article/10.3390/app14166973/s1](https://www.mdpi.com/article/10.3390/app14166973/s1)]([https://www.mdpi.com/article/10.3390/app14166973/s1](https://www.mdpi.com/article/10.3390/app14166973/s1)), Table S1: Magnetic susceptibility values recorded in situ by Kappameter KM-7 at SL1 profile in Slovacka Cave; Table S2: Magnetic susceptibility values recorded in situ by Kappameter KM-7 at KG1 profile in Crnopac Cave System; Table S3: Magnetic susceptibility values recorded in situ by Kappameter KM-7 at KG2 profile in Crnopac Cave System; Table S4: Magnetic susceptibility values recorded in laboratory by Bartington MS2B at SL1 profile in Slovacka Cave; Table S5: Magnetic susceptibility values recorded in laboratory by Bartington MS2B at KG1 profile in Crnopac Cave System; Table S6: Magnetic susceptibility values recorded in laboratory by Bartington MS2B at KG2 profile in Crnopac Cave System. Conceptualization, A.K. and D.P. ; methodology, A.K. and D.P. ; software, A.K. and T.M. ; validation, U.B., A.K., D.P. and T.M. ; formal analysis, A.K. ; investigation, A.K. and D.P. ; resources, A.K. and D.P. ; data curation, A.K. ; writing--original draft preparation, U.B. and A.K. ; writing--review and editing, U.B., A.K., D.P. and T.M. ; visualization, A.K. ; supervision, U.B., D.P. and T.M. ; project administration, A.K. ; funding acquisition, T.M. All authors have read and agreed to the published version of the manuscript. This research received no external funding. The original contributions presented in the study are included in the article/Supplementary Materials, further inquiries can be directed to the corresponding authors. The authors would like to thank the Speleological Society Velebit and Speleological Section Sv. Mihovil for providing the Kappameter KM-7 device and information about the caves, and the Ozren Lukic Speleological Club for their logistical support. The authors thank the anonymous reviewers and editors for their generous and constructive comments that have improved this paper. Research is partially supported by \"Mathematical research in geology IX\" project (led by [PERSON]) at the University of Zagreb.