float observations by W.A. Johnston, 1919 ; base-map prepared from topographical sheets nos. 1 and 2 of the Frasr River investigation series, by the Geological Survey, 1919 ; fathom lines by Hydrographic Survey, Department of the Naval Service, Canada, 1919
Releif shown by contours and spot heights. Depths shown by soundings.
At head of title: Canada, Department of Mines, Geological Survey.
To accompany: Sedimentation of the Fraser River Delta / W.A. Johnston. Memoir / Geological Survey of Canada ; 125, and, Geology of the Fraser River Delta map-area / W.A. Johnston. Memoir / Geological Survey of Canada ; 135.