Canadian Forest Service Publications
Ribbed grooves and tracks in mud tidal flats of cold regions. 1972. Dionne, J.-C. J. Sediment. Petrol. 42(4): 848-851.
Issued by: Laurentian Forestry Centre
Catalog ID: 15091
Availability: PDF (request by e-mail)
Ribbed grooves, resembling bulldozer tracks and animal ribbed trails, develop in mud tidal flats of the St. Lawrence Estuary, Quebec, during break-up. They are perpendicular to the tidal currents, and are made by ice blocks scratching the surface of the tidal flat when being carried seaward by ebb currents. A peculiar track 20 cm wide and 50 m long, parallel to ebb currents, was also discovered. The origin of the track is not known but, if it is a natural feature, it may be ice-made.