![]() ![]() ![]() DOMs are becoming a popular tool in geosciences and their advancement over the past two decades has been signicant ( Buckley et al., 2008, 2019 Carrivick et al., 2016 Enge et al., 2007 Senger et al., 2020 Wilkinson et al., 2016 ). DOMs can, therefore, incorporate topographical data of various scales, bridging the gap between centimeter-scale local observations and hundreds of meters-scale seismic structures ( Enge et al., 2007 ). ![]() Digital outcrop models (DOMs) represent a geore- ferenced 3D view of an outcrop with mm-to dm-scale. Digitalization of outcrops, in particular, complements conventional outcrop analysis, allowing for quantitative digital assessment. Furthermore, we show that this technique expands the two- dimensional outcrop surface into a three-dimensi onal domain, thus complementing, strengthening and extend- ing outcrop interpretations.Īnalyzing outcrops is a fundamental technique in many contempo- rary geological investigations. Key horizons in outcrop and the GPR proles allow tying together observations between these methods. The chaotic nature of paleokarst breccias is seen both in outcrop and GPR. By integrating subsurface geophysic al data with DOMs we were able to correlate reection patterns in GPR with outcrop features. We dened three geophysical facies based on their appearance in GPR. GPR is typically used for surveying the shallow subsurface and relies on detecting the contrasts in electro-magnetic permittivity. DOMs are obtained through combining a series of overlapping photographs with structure-from- motion photogrammetry, to create mm- to dm-resolution georeferenced DOMs. In this study we integrate digital outcrop models (DOMs) with a 2D ground penetrating radar (GPR) survey to extrapolate external irregular paleokarst geometries beyond the 2D outcrops. Here the Carboniferous stratigraphy exhibits intervals of paleokarst breccias formed by gypsum dissolution. The Billefjorden Trough in the High Arctic archipelago of Svalbard is an example of such a rift. Paleokarst breccias are a common feature of sedimentary rift basins. ![]()
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