Issues

ON COVER – Remarkable preservation of mudstone-draped, longitudinal, symmetrical ripples in an outcrop exposure of the Lower Triassic Montney Formation near Sulphur Mountain, Alberta. Bedform occurrence infers wave processes of deposition (oscillatory flow) observed on the upper shoreface of a prograding ramp. Similar deposits are observed in cores that provide a key source of information for reconstructing the facies heterogeneity and stratigraphic architecture of the Montney Formation in the subsurface of the Western Canada Sedimentary Basin. Inset depicts a portion of the sequence stratigraphic architecture of the Montney Formation (see Figure 13 of Baniak et al., p. 283 of this issue of the Bulletin). Outcrop exposure is 50 cmwide. Photograph by T. Moslow; cover design illustration by S. Michailides.