https://geoscan.nrcan.gc.ca/starweb/nrcanphoto/servlet.starweb?path=nrcanphoto/nrcanphotofastlink_f.web&search1=R=55253
Natural Resources Canada, 1992
Vreeken, W. J., Buried cumulic soil. A horizon with Scoyenia ichnofacies. Pole burrow in fillings consist of mazama tephra., Natural Resources Canada Photo...
Photographie