Multiple choice Which of the following is the correctly matched? Shield volcanoes - Largest in the world Tectonic earthquakes - Explosion of chemical or nuclear devices The Crust - 70 km thick in theHimalayan region. The mantle - Referred to as the nife layer Lacoliths - Formed by lava solidified almost perpendicular to the ground Reveal answer Fill a bubble to check yourself C Correct answer Explanation The continental crust is thicker in the areas of major mountain systems. It is as much as 70 km thick in the Himalayan region.