Gold, California. Heavy wire gold on milky quartz.

'Goniatites choktaensis'. Pennsylvanian. Ward's slide LW 35-111.

Gorda Escarpment. Showing the displacement of the submarine contours off northern California where the San Andreas Fault may bend seaward. According to this hypothesis, the Gorda Escarpment resulted from the seaward shift of the area tot he south. The dots are earthquakes epicentres and the accompanying numbers are magnitudes on the Richter Scale, which measures the intensity of earthquakes according to their damage to structures. It will be noted that the large earthquakes (6 and over) are concentrated along this escarpment. Shepard, 1960, p. 125.

Grain elevator and lodging docks, Churchill, Manitoba. July 31, 1965.

Grand Canyon, Arizona. September 1947. W.O.K. and Rob Scholten in photograph.

Grand Tetons, Wyoming showing cirque, glaciated valley.

Granite dome, Yosemite National Park, California. Nash parked.

Gravel bar and tropical vegetation, Unini River near confluence with Ucayali River. Campa Indian poling canoe.

For glacial geology of Ottawa area, see C.S.C. Mem. 101. Marine clays (Leda clay) with reworked boulders over ice contact stratified drift. Leda (a pelecypod) is now known as Yoldia. Nelson Gadd in picture, shovel at contact. Gravel pit near Gloucester Hunt Club and Metcalfe Road, Ottawa, Ontario.

Gravestone of Reverand Jon Steingrimsson who wrote a classical description of the Laki eruption (1783). The stone is a very regular hexagonal basalt column. August 10, 1960.

Great Bear Cape, Ellesmere. Gordon Jones and Bill Furnival leaving Great Bear Cape camp by LKP.

Great Britain and nearby parts of continental Europe, showing wide tracts that lie less than 600 feet below sea level. During the Ice Age there was free communication between the islands and the continent, and plants and animals migrated in both directions. A large river, of which the Rhine and Thames were tributaries, drained into the North Sea. The last separation of Great Britain from the mainland took place about 7000 years ago. Present lands are shown in gray, chief rivers and waters over 600 feet deep in back and shallowly submerged land in white. (Stokes, 1960, p. 402)

Great Lakes. Successive stages in the development of the Great Lakes, North America. C. The upper lakes, swollen into the ancestral Lake Algonquin, drain, together with Lake Erie, into a seaway that occupied the St. Lawrence valley, and extended over the site of Lake Ontario. An occasional overflow from Lake Michigan. spills into the Mississippi. D. The lakes approach their present-day outlines, the upper lakes draining into the dwindling St. Lawrence seaway through the valley of what is now the Ottawa River, E, Lake Erie; F, Finger Lakes of New York State; H, Lake Huron; S, Lake Superior. Holmes, 1953, p. 243. See also XII - 111.

Grey facies with coal seams of Ravenscrag (Paleocene) formation at type section. Ravenscrag Butte, Sask.