Gneiss | Marble | Slate and Slatey Cleavage
GNEISS |
|
| 401.-.1 | Contorted gneiss, shore of Ottawa River, Canada. |
| 401.-.2 | Boulder of contorted gneiss, Amherst, Massachusetts. |
| 401.-.3 | Pre-cambrian gneiss cutting Precambrian granite. Man is on granite; contact cuts gneiss squarely beneath foreground patch of soil. Kingston, Ontario. All hill and valley here shown are Pre-ordovician, disclosed by removal of earlier Paleozoic limestone. Slide 481.B.3 and 4 are at water level below dead tree. |
MARBLE |
|
| 407.-.1 | Marble flowage effects produced by metamorphism. Georgian Bay, near Honey Harbor, Ontario. |
SLATE AND SLATEY CLEAVAGE |
|
| 409.-.1 | Anticlinal fold. Axis dip and cleavage dip to west; beds thicken at summit; Castlemaine, Victoria. |
| 409.-.2 | Slatey cleavage and its relation to bedding planes; 2 miles south of Walland, Tennessee. |
| 409.-.3 | Hill showing cleavage in granite. North side of Deep Spring Valley. Inyo County, California. |
| 409.-.4 | West end of ridge, giving nearer view of granite. Same locality as preceding slide. |
| 409.-.5 | Diagram of pure shortening, after Van Hise. |
| 409.-.6 | Diagram showing the development of fracture cleavage, after Van Hise. |
| 409.-.7 | Block showing development of fracture cleavage, after Van Hise. |
