Assume that Sample B (subvolcanic sill) was exposed to slightly slower cooling conditions. What change in texture would most likely occur?
A
Crystals would become larger, and vesicle content would decrease.B
Vesicle volume would increase, but crystal size would remain constant.C
The rock would develop a glassy surface and lose all vesicles.D
Crystals would become smaller, but vesicles would expand in size.