Gully, in places five feet deep, cut across road on alluvial gravels during 36 hours of rainstorms and and cloud bursts. Zortman, Little Rocky Mountains, Montana, May, 1964.

Gully at Campamento Pirin showing grey Cretaceous Ayavacas limestone thrust over Tertiary red Puno beds. Notice well head in gully.

Gullfoss waterfall of Hvita River; total falls are 31 m high. Self in picture. August 9, 1960.

Growth of Pleistocene glaciers (Bray 1962, p.7).

Group photo of SK and Montana University students. Little Rocky Mountains field camp, Montana.

Group of hot springs at Geysir. August 9, 1960.

Grooved and polished quartzite; Great Cloche Island, Ontario.

Grinnell Glacier, Glacier National Park, Montana.

Axel Heiberg Gr. Looking upvalley toward station 62 K 106 , the greyish white beds with some hard ledges ate Cretaceous Kanguk, the hard sandstone on top is Tertiary Eureka Sound.

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

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.

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

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.

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.