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Feature Vocabulary (Dykes (cut through layers) (flat intrusive bodies that…
Feature Vocabulary
Dykes (cut through layers)
flat intrusive bodies that cut through layers or follow fractures
can form near surface
sometimes look like extrusive rocks(small crystals)
Vertical black line
Sills
flat intrusive bodies
follow bedding and tend to be horizontal ()dykes cut bedding and tend to be vertical
Basalt
Laccolith
mushroom shaped body
magma is injected between layers
inflates or puffs them up
Plutons(big intrusive body)
a mass of igneous rock that cools and crystallizes within the curst (any size or shape)
cool at depth; brought to surface by Plate Tectonic/Erosion
rising bodies of magma are called Diapirs
Batholith
large (>100 km2) igneous bodies formed by several plutons formed together