chapter 11 part b mountain building

Question 1

mountain building

Answer 1

• orogenesis (greek) oros = mountains, genesis = to come into being
• the process that collectively produce a mountain belt
• result of plate tectonics
• origin is plate boundaries

Question 2

mechanism 1. horizontal compressional forces

Answer 2

that have shortened and thickened the crust, producing folding and thrust faulting of preexisting sedimentary rocks and crystalline crustal fragments

Question 3

mechanism 2. horizontal tensional stress

Answer 3

-causes the upper crust to be broken along normal faults, while the lower crust deforms by ductile stretching