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APSC 151 Week 3 Questions And Answers $12.79
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APSC 151 Week 3 Questions And Answers
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tunnel failure ~ - squeezing (ductile) - spalling (brittle - with structure (complex) riks: - rockburst -overstress in sedimentary rocks road header ~ tunneling method - weak rock excavation drill and blast ~ tunnel method - explosives and detonators shielded TBM ~ erects liner within ...

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  • August 5, 2024
  • 28
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • apsc 151 week 3 questions and answers

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  • APSC 151
  • APSC 151

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APSC 151 Week 3 Questions
And Answers

force


✓✓✓✓~ Puts stationary objects in motion or changes the motions of moving bodies




compressive strain


✓✓✓✓~ - negative

Continuous tectonic plate movement creates stresses and strains in the crust




Deformation


✓✓✓✓~ refers to all changes in the original form and/or size of a rock body

- Most crustal deformation occurs along or near plate margins


- Small amounts of strain over geological time cause large changes




elastic deformation


✓✓✓✓~ region where the material will return to its original shape when the stress is
removed

,brittle fracture


✓✓✓✓~ - Breaks into pieces

- Low temps and pressures near the surface


Ex. Faults, joints




ductile deformation


✓✓✓✓~ - Permanent deformation without breaking

- High temps and pressures deep: solid state flow


- Often with metamorphism


Ex. folds




differential stress


✓✓✓✓~ Applied unequally from different directions




compressional stress


✓✓✓✓~ differential stress that shortens a rock body




tensional stress

, ✓✓✓✓~ elongates a rock body




shear stress


✓✓✓✓~ changes the shape of a rock body




crystal deformation


✓✓✓✓~ Under directed pressure (from tectonics), atoms can move (slowly) within a solid to
create shortening in one direction




faults


✓✓✓✓~ Faults are large scale shear ruptures and fractures in the crust both locally and
globally




folds


✓✓✓✓~ ductile deformations outlined by folded strata or folded fabric that we know used to
be horizontal or vertical
- Most folds result from compressional stresses which shorten and thicken the

crust


PARTS:


*Limbs :*Two sides of a fold


*Axis:* Crest of the fold - Perpendicular to the shortening or the compression

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