Consult the figure below.If you found deposits of tuff at an ___________ igneous setting,you could conclude that the lava had a ___________ viscosity content.
A) intrusive; high
B) intrusive; low
C) extrusive; high
D) extrusive; low

Question

Consult the figure below.If you found deposits of tuff at an ___________ igneous setting,you could conclude that the lava had a ___________ viscosity content. 
A) intrusive; high 
B) intrusive; low 
C) extrusive; high 
D) extrusive; low

Quizplus · Accepted Answer

Tuff is a type of volcanic rock that consists of consolidated volcanic ash. It is formed from highly explosive volcanic eruptions that eject ash, pumice, and other pyroclastic materials into the atmosphere. These materials settle back down to the ground and form layers of tuff. Since tuff is formed in extrusive volcanic settings, the correct answer for the first blank is extrusive. The viscosity of magma affects the explosiveness of volcanic eruptions, with highly viscous magma producing more explosive eruptions. Therefore, the correct answer for the second blank is high. Hence, the correct answer is C.

Consult the Figure Below