Geologic Structures. Structural Geology – study of deformation of rocks and the forces that cause deformation. Structural Geology is concerned with deformation of the Earth's crust. Where is deformation occurring today? Plate boundaries Active orogenic belts (Impact structures)
Structural Geology – study of deformation of rocks and the forces that cause deformation
Where is deformation occurring today?
Where has deformation occurred in the past?
Why do we want to understand deformation?
Stress – Compression, Tension, Shear
Strain – Elastic, Plastic, Brittle
Geologic Maps – strike & dip (angle, direction), geologic cross-sections
Folds – antiforms, synforms, limbs, hinge line (axis), axial plane, domes, basins,
Plunging folds, domes, basins
Open, isoclinal, overturned, recumbent
Tensional, compressional, sets
Fault plane, hanging wall, footwall
Faults – dip-slip, strike-slip, oblique-slip
Dip-slip – normal, reverse
Pliocene-Pleistocene, Zanjan-Tabriz highway