Les rides de courants 2D (straight ripples)
Rides 3d ou à crêtes sinueuses (Linguoid ripples)
Rides chevauchantes ou grimpantes (climbing ripples)
- Planar view of current ripples in medium sand, Autie bay, France
- Planar view of wind ripples in medium sand, South Morrocco
- Planar view of wind ripples in medium sand, Ténéré, Niger
- Cross section showing climbing ripples. Miocene France
- cross-section showing the internal structure 3D ripples - Cretacous, Angola
- Cross section showing climbing ripples. Ordovician, Lybia
- cross-section showing the internal structure 2D ripples and climbing ripples. Ordovian, Morrocco
- Planar view of lingoid current ripples - Ordovician Morrocco
Les mégarides ou dunes hydrauliques – modèles actuels
- After Reineck @ Singh 1975
- Present day dunes with sinuous crest line (3D) - and current ripples Arcachon bay
- Present day dunes with straight crest line (2D) - Arcachon bay
- Present day dunes with sinuous crest line (3D), Autie Bay, France