Gneiss outcrop, Le Pouliguen

3D Model

This is a photogrammetric reconstruction of a gneissic outcrop of the Le Pouliguen coast (Loire-Atlantique, France). This outcrop is made of paragneiss (highly metamorphized rock of sedimentary origin) as desmontrated by the sub-vertical foliation and high-silicium content (both oriented quartz grain and amorphous silicium veins are present). This small outcrop feature very interesting “undulating” structures cross-cut by the foilation. Seen from above, it looks like asymetric to sygmoidal (mega-)ripple, that might have been preserved from the primary sandstone before metamorphism.

This outcrop is accessible with a little stairway from a pedestrian scenic trail along the wild coast of Le Pouliguen twon (Loire-Atlantique, France; GPS coord: 47°15‘34.63”N; 2°25‘43.15”W)

Look carefully and you will be able to spot several little sea snails on the rocks! :)

Credits: Gwénaël CARAVACA (LPG Nantes)