Consult the figure below.If you found tuff deposits 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 tuff deposits 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 deposits are formed from explosive volcanic eruptions where hot ash and rock fragments are ejected into the air and then settle back down to the ground. This type of explosive eruption is characteristic of high viscosity lava, which doesn't flow easily and builds up pressure until it explodes. Extrusive igneous settings are where volcanic activity occurs, so the correct answer is extrusive and high viscosity content.

Consult the Figure Below