Across
- 2. local steepening of flat-lying beds producing a bend in the rock unit
- 3. buried erosional surface separating two rock masses of different ages
- 5. depression dissolved beneath the surface
- 7. downfold, also the result of compression, opens upward, with younger beds in the center of the fold
- 11. area of relatively level high ground
- 16. rock layer cutting across layering rock into which it intrudes
- 17. Quartzite a marine sandstone resistant to erosion
- 18. fault a reverse fault in which the fault plane dips at a lower angle
- 20. where sedimentary rock layers lie directly on top of crystalline rocks
Down
- 1. compression of the layered rocks creates an upfold, opening downward, with older beds in the center of the fold
- 4. fault the hanging wall side of the fault moves down in relation to the footwall side
- 6. Formation Shallow-ocean deposits
- 8. result of movement along a break or fracture
- 9. rock texture produced by severe mechanical weathering
- 10. elongate, elliptically shaped hill composed of till
- 12. Schist oldest rock formation in the Grand Canyon
- 13. black mica that is a common rock-forming mineral
- 14. Unconformity Period of horizontal contact between the Precambrian and the Paleozoic beds
- 15. a dark, fine-grained igneous rock
- 19. curve or bend of a planar structure