Intensely fractured syentite in road cut at station F-1, Alder Gulch near Zortman Butte, Little Rocky Mountains, Montana. May, 1964.

Inselbergs of batholithic rocks on a rejuvenated erosion surface, Madagascar. The crystalline floor has been bevelled by a vast erosion surface that is slightly rejuvenated as indicated by the rivers which begin to cut down. On the surface lies a group of Inselbergs whose steep slopes form a clearly visible angle with the erosion surface. They are residual hills of harder rocks belonging to an oval shaped batholith the outline of which is indicated by the drainage. Erosion of this group was clearly fracture-controlled. In places the erosion surface penetrates into the group and all the batholithic rock has been removed. France Institut Geographique National. Relief form atlas, 1956, p. 103.

Inoceramus nebrascensis (S.E. corner sec. 30, T. 21, R. 22, W. 2) and Bacilites compressus (no location) from the Bearpaw formation, Sask.

Influence of lithological differences on topography and vegetation. Lookiing north along outcrop ledges of Edmonton formation exposed near Trans-Canada Highway between Calgary and Banff. Dip is to the left, west. Saturday, May 28, 1960.

Index to maps covering Moose Mountain area.

Index map of southwestern Saskatchewan and adjacent regions showing the Dollard area.

Index map of southeastern Saskatchewan and adjacent areas. Of the periglacial drainage, only the channels of the Missouri and Yellowstone rivers are shown. The Weyburn area is indicated by marginal ruling (Meneley et al., 1957).

Index map - Moose Mountain area.

Incised meanders of meltwater stream on glacier, Ellesmere Island, north of Greeley Fiord. Air photo A 16706-46.

Inca fitted stone wall showing offset due to earthquake, Machu Picchu.

Imbricate structures in conglomerate. Diagram showing prominent imbrication of platy fragments along the top of a gravel layer in Pennsylvanian Wamsutta clastics near Attleboro, eastern Massachusetts. It is to be noted that the bases of the gravel layers are relatively even because the first pebbles to be rolled in place traveled over the smooth surfaces made by the underlying sand. Flat pebbles like those showing conspicuous imbrication can be rolled along the bottom easily if turned so as to behave as upright disks in the current. When they fall over, they are likely to assume an imbricate relationship: for this is the most stable under conditions of strong bottom currents. Shrock, 1948, p. 255.

Idealised diagram to show the origin of some of the more common glacial landforms.

Ice-thrusting in Ravenscrag beds causing over-thrusting and miniature nappe structures. West of Halbrite, Sask. May, 1962.

Ice-thrust structures in bedrock (Belly River fm.), S and W of Lloydminster, Alta.

Ice-thrust folds in Upper Cretaceous Edmonton formation, 5 miles east of Edmonton near junction of highways 14X and 16.