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Geologic structures
- 1. GEOLOGIC STRUCTURES • “Architecture of bedrock” • Structural Geology– shapes, – arrangement, – interrelationships of bedrock – units & forces that cause them
- 4. Behavior of rocks to stress & strain • Elastic – Elastic limit • Plastic • Brittle Stress Strain
- 6. Structures as a Record of the Geologic Past • Geologic maps and field methods – Observations of outcrops – Geologic map – Strike and dip • • • • • Original horizontality Strike Angle of dip Direction of dip Symbols – Geologic cross section
- 8. Structures as a Record of the Geologic Past • Geologic maps and field methods – Observations of outcrops – Geologic map – Strike and dip • • • • • Original horizontality Strike Angle of dip Direction of dip Symbols – Geologic cross section
- 10. Structures as a Record of the Geologic Past • Geologic maps and field methods – Observations of outcrops – Geologic map – Strike and dip • • • • • Original horizontality Strike Angle of dip Direction of dip Symbols – Geologic cross section
- 13. FOLDS • Anticline vs. syncline – Hinge line (axis) – Limb – Axial plane • Plunging fold • Structural dome • Structural basin
- 15. FOLDS • Anticline vs. syncline – Hinge line (axis) – Limb – Axial plane • Plunging fold • Structural dome • Structural basin
- 17. FOLDS • Anticline vs. syncline – Hinge line (axis) – Limb – Axial plane • Plunging fold • Structural dome • Structural basin
- 20. FOLDS • Interpreting folds – Open fold – Isoclinal fold – Overturned fold – Recumbent fold
- 25. Fractures in rock • Joints – Columnar jointing – Sheet jointing – Joint set • Faults – Dip-slip faults- normal and reverse • Footwall vs. hanging wall – Normal fault • Graben; Rift • Horst ; fault-block mountain range
- 28. Fractures in rock • Joints – Columnar jointing – Sheet jointing – Joint set • Faults – Dip-slip faults- normal and reverse • Footwall vs. hanging wall – Normal fault • Graben; Rift • Horst ; fault-block mountain range
- 31. Fractures in rock • Faults – Reverse fault • Thrust fault- low angle reverse fault – Strike-Slip fault • Left-lateral vs. right-lateral
- 33. Fractures in rock • Faults – Reverse fault • Thrust fault- low angle reverse fault – Strike-Slip fault • Left-lateral vs. right-lateral