TABLE OF CONTENTS Why the Black Canyon crosses the Gunnison uplift Rock formationstheir attributes and geologic settings Metamorphic rocksPrecambrian The Gunnison uplift
ILLUSTRATIONS FIGURES 1. Comparative profiles of several well-known American canyons2. Location map of the Black Canyon area 3. The Narrows of the Black Canyon 4. Talus blocks in canyon bottom at foot of Painted Wall, August 29, 1963 5. Chasm Wall at north end of Vernal Mesa 6. Major divisions of geologic time 7. Critical stages in the development of the Black Canyon landscape 8. Rock formations of the Black Canyon area 9. Contorted gneiss, north rim of Black Canyon near Colorado State Highway 92 10. Hand specimen of Vernal Mesa Quartz Monzonite 11. Curecanti Needle, 6 miles downstream from head of Black Canyon 12. Stereogram of the Curecanti pluton 13. Pegmatite dike intruding biotite gneiss 14. Dikes of lamprophyre cutting across biotite gneiss 15. Black Canyon of the Gunnison National Monument and vicinity, Colorado 16. Ancestral Uncompahgre highland just before Entrada Sandstone was deposited 17. Stratigraphic section near mouth of Smith Fork 18. Craggy outcrops of West Elk Breccia 19. Generalized section across Gunnison uplift 20. Isolated pinnacles of quartzitic gneiss 21. Cimarron fault, north across valley of Squaw Creek 22. Block diagram showing lateral and vertical passage of a fault into a monocline 23. Structure contour map drawn at the base of the ash-flow tuff volcanic sequence
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