Plutonic Textures Flashcards
1
Q
Crystal Sizes
A
Phaneritic (most xls are large)
Aphanitic (xls are small)
Pegmetitic (xls are very big) (>2.5 cm)
2
Q
Distribution of Sizes
A
“Equi”granular: crystals are all about the same size
Inequigranular: crystals are not the same size
3
Q
Crystal Shapes
A
Euhedral: well shaped crystals
Subhedral: middle
Anhedral: poorly shaped crystals
4
Q
Rock Shapes
A
Panidiomorphic: most crystals are euhedral
Hypidiomorphic: most crystals are subhedral
Alliotriomorphic: most crystals are anhedral
5
Q
A
