Fluvio-glacial valley. 1. Moraine plateau. 2. Fluvio-glacial valley. 3. Terraces, resistant parts of earlier valley bottoms. 4. Recent valley floor cut into the terrace. 5. Erosion gulleys. a. Terrace with dead-ice topography. b. Lake in kettle hole. c. Bog depression in former river bed. d. Present valley. A. Moraine. B. Fluvio-glacial sand. Source: Atlas of Denmark.

Fold, recumbent on south side of Buchanan Lake, Axel Heiberg Island. Photo N.C. Warlaw, summer 1961.

Looking across folded upland of Liddon Gulf (left) and Sabine Bay, Melville Island. In the foreground is a syncline with strata dipping inwards. Erosion here has left a central ridge. Note how the large river has cut right across the fold. 1 Aug. 1950; 20,000 feet.

Folds in glacier ice. North Blea Mountain, Ellesmere Island. Photo N.C. Warlaw, summer 1961.

Force of growing crystals demonstrated by shattering of a telephone pole set in "alkali" saline deposits along lake margin. East of Dundurn, SK. Fall, 1962.

Force of growing crystals demonstrated by a completely shattered and broken off telephone pole, set in "alkali" saline deposits along lake margin. East of Dundurn, SK. Fall, 1962.

Force of growing roots along tilted bedding plane has lifted a joint block in Ordivician limestone exposed in Brown's Gulch, Little Rocky Mountains, Montana. May, 1963.

Formation of dump end moraine (Leet and Judson, 1954, p. 195).

Formation of esker in ice-age. Sand and gravel sedimentation in meltwater tunnel of crevasse in moraine-choked glacier ice or dead-ice. The shape of the esker formed after the melting of the ice by soil slipping from the ice-contact walls. Source: Atlas of Denmark.

Former valley of Yellowstone River, north of Williston, N.D.

Forms of blown sand on the beach. 1. Submarine bar. 1a. Erosion channel in barcut by returning wave water. 2. Beach ridge. 3. Deflation-plained beach. 4. Barcan, due to unsheltered conditions. 5. Dune embryo, formed in shelter behond grass tussocks. 6b. Windward dune. 6c. Lee dune, formed in lee of stone. 7. Dune embryo, prestage of organoenous dune formation. 8. Littoral dunes, "white" dunes, young forms. A. Moraine. B. Gravel and sand. C. Blown sand. Source: Atlas of Denmark.

Forms of diatoms.

Fort a la Corne and Nipawin, Sask. Pioneer Geologists in Saskatchewan.

Fossil percentage method, invertebrates, Pleistocene. Stirton, 1959, p. 85.

Fossil tree stumps in front of Drumheller Museum, AB. Collected locally from the Edmonton (Upper Cretaceous) formation. Hank Wolbeer. November 10, 1962.