Amphipora in slab of Fairholme fm. Tributary of Jura Creek near Exshaw, Alberta. May, 1961.

Ancient river systems of the Great Lakes Basins after Spencer 1891 (Mozola, 1962, p. 21).

Angular unconformity. Zechstein above folded Carbiniferous. Carboniferous rocks (folded intensely) were leveled down by erosion; and on the erosion surface Permian strata (Zechstein) were horizontally deposited. The whole sequence was then raised, and again attacked by erosion. Cloos, 1954, p1. 44.

Angular unconformity. Pennsylvanian rocks lie with well developed angular unconformity on older folded rocks. Location: Melville Island at N. lat. 76 degrees, 00': W. long. 113 degrees 20'. For geology see G.S.C. Map 13-1959. Airphoto T416C-75.

Antarctica, Ross Ice Shelf. Top: Ice in the Bay of Whales, a reentrant in the Ross Ice Shelf, protected in part by islands. The bay ice, 30 to 50 feet thick is folded by the pressure of the advance of the much thicker shelf ice around the protecting islands. The indvidual folds are several tens of feet high. Similar folds nearby are caused by the drag of the shelf ice over its own morainal deposits. Bottom: Sections through the Ross Shelf Ice abd Bay of Whales. The thickness of the ice has been determined by seismic methods. (Gilluly et al., 1959, p. 226).

Anticlinal valley near (notice the opposite dips) Pisac.

Anticline. Peace River. G.S.C. Photo.

Approximate extent of Arctic and Eastern faunal realms. (Nelson, 1959, p. 47).

This fonds contains files relating to Professor Byers research in Northern Saskatchewan and Manitoba, specifically Amisk, Wildnest, Annabel, Waddy, Neagle, Face, Errington, Black and Pillow lakes; Flin Flon; and Missi Island.

Arboreal pollen and ratio of arboreal to non-arboreal pollen, Herbert Site.

Archaeologists at work near Gull Lake, Saskatchewan.

Archaeology. Some weapon points of early big-game hunters, from 7 to 12 thousand years ago. Top row (left to right) Scottsbluff, Eden, Angostura; bottom row (left to right) Clovis Fluted, Folsom Fluted, Plainsview. After Wedel, 1961.

Archaeology. Provisional chart showing approximate time relationship of certain archaeological sites and complexes in Plains area. Wedel, 1961.

Archaeology camp near Gull Lake, Saskatchewan

Arcs. Primary double mountain arc of western United States. Jacobs et al., 1959, p. 296.