Large crystals found in a fine-grained groundmass can indicate:a. ...

[joblessjake]

Large crystals found in a fine-grained groundmass can indicate:a.
   origin from a magma with an early intrusive phase followed by an extrusive phase.
  b. origin from a magma with an early extrusive phase followed by an intrusive phase.
  c. a rock of mixed volcanic-plutonic origin.
  d. origin from a magma with an early intrusive phase followed by an extrusive phase AND a
  rock of mixed volcanic-plutonic origin.
  e. origin from a magma with an early extrusive phase followed by an intrusive phase AND a
  rock of mixed volcanic-plutonic origin.

Question 2

Aphanitic, phaneritic, and porphyritic are textural terms that:a.
   refer to fine-grained, course-grained, and mixed-grained crystal sizes, respectively.
  b. refer to formation by slow cooling, fast cooling, and mixed cooling rates, respectively.
  c. are indicative of volcanic, plutonic, and mixed plutonic-volcanic origins, respectively.
  d. refer to fine-grained, course-grained, and mixed-grained crystal sizes, respectively, AND
  are indicative of volcanic, plutonic, and mixed plutonic-volcanic origins, respectively.
  e. all of these.

[Ahernandez18]

Answer to Question 1

D

Answer to Question 2

E