Flood plain terrace along South Saskatchewan River in Saskatoon. View from 25th Street bridge toward Bessborough. December, 1962.

Floodplain deposits. A. Schmetic plan of deposits alonf Mississippi River near Lake Providence, Louisiana. B. Schematic cross section of floodplain deposits of a meandering river, showing lenses of deposits of channel deposits (dotted, clay plugs in solid black) in matrix of interchannel deposits. Length of area shown, several tens of miles; large vertical exaggeration. Dunbar and Rodgers, 1957, p. 34.

Ice sections from depth of 71 (top) and 300 metres (bottom) at Byrd Station are magnified 3.25 diameters (a grid square represents one square centimeter). The numerous tiny gray, white and black spherules are air bubbles trapped by the ice. With increased depth, ice crystals tend to become larger and air bubbles smaller. The deeper ice was deposited as anow about 1,600 years ago (Scientific American, Spet. 1962, p. 133).

Pennsylvanian landscape in the swampy lowlands showing characteristic vegetation and sprawling amphibians. Plants: 1. a tree fern, 2. 'Lepidodendron', a scale tree, 3. 'Sigillaria', a scale tree, 4. 'Cordaites', a precursor of the conifers, 5. 'Calamites', a scouring rush. Animals: 6. 'Diplovertebron', a primitive amphibian, 7. 'Ecyops' (?), a large amphibian, 8. 'Eogyrinus', one of the largest amphibians, 9. 'Seymouria', a primitive reptile, 11. 'Varanosaurus', a reptile, 12. 'Meganeuron', a giant dragonfly like insect. (Dunbar, 1960, p. 218).

Flow lines of ice over and around drumlin.

Fluorite, Cave-in-Rock, Illinois. A group of large purple cubic crystals.

Fluorite, Rosiclare, Illinois. Typical cleavage octahedra.

Fluorite, Westmoreland, New Hampshire. An excellent example of the octahedral cleavage fluorite.

Fluting, grooved and drumlinized bedrock west of Bloody River. Aerial view looking west in the direction of the ice movement. Thursday 6 August, 1959.

Fluting, grooved and drumlinized bedrock west of Bloody River. Aerial view looking west in the direction of the ice movement. Thursday 6 August, 1959.

Flutings in weathered surface of the sand member of the Whitemud formation. South of Frenchman River near Busse Ranch, Eastend, Sask.

Flutings near Katepwa, Sask.

Flutings near Katepwa, Sask. View along crest of ridge.

Flutings near North Battleford, Sask.

Fluvial sand and gravel (at base) overlying till. Coal pebbles in gravel (coal transported from Whitemud or Ravenscrag). South of Eastend, Sask.