intrusive igneous structures Flashcards
1
Q
plutons of more or less irregular shape with surface exposure 100km2
A
batholith
2
Q
plutons with surface exposures less than 100km2
A
stocks
3
Q
parallel to the country rock
A
concordant plutonic structures (SLL)
4
Q
intersecting the country rock
A
discordant plutonic structure (DND)
5
Q
a tabular concordant pluton that parallels the country rock
A
sill
6
Q
a dome like concordant pluton characterized by a dome roof and flat floor
A
laccolith
7
Q
a dish shaped concordant pluton that has a champagne glass appearance in a section view
A
lopolith
8
Q
a tabular intrusions that cuts through the country rock
A
dike
9
Q
cylindrical dikes exposed by erosion and represents ancient conduits of old volcanoes
A
neck
10
Q
cylindrical pipes that can extend up to 20km deep and develop through explosive intrusions
A
diatremes
