Description
The model as an aerial extent of 140×70 m and shows a cliff made of sills stacked atop each other. The different intrusive units can be distinguished on the basis of the horizontal to sub-horizontal discontinuities and the different orientations of columnar joints. At least two main sills can be recognized: on the left hand side of the model, the lower unit is marked by columnar joints dipping to the left side. The same, underlying sill, shows vertical columnar joints on the right hand side of the image. The overlying sill displays columnar joints that dip at different angles from the lower one.
On the left hand side of the image, it is worth observing a series of solifluction morphologies affecting the debris deposits. The area is located in western Iceland, along the Snæfellsnes peninsula; further details on the geology of the area are provided in Tibaldi et al. (2013); additional information on sills are reported in Gudmundsson et al. (2014).
Credits: UAV-based survey and 3D DOM provided by Fabio Marchese; funding is from MIUR project ACPR15T4_00098 (http://argo3d.unimib.it/). Description provided by Alessandro Tibaldi and Federico Pasquaré Mariotto.
References:
- Gudmundsson, A., Pasquarè, F. A., & Tibaldi, A. (2014). Dykes, sills, laccoliths, and inclined sheets in Iceland. In Physical Geology of Shallow Magmatic Systems (pp. 363-376). Springer.
- Tibaldi A., Bonali F.L., Pasquaré F.A., Rust D., Cavallo A., D’Urso A. (2013). Structure of regional dykes and local cone sheets in the Midhyrna-Lysuskard area, Snaefellsnes Peninsula (NW Iceland). Bulletin of Volcanology, 75, 764-780.