Intrusive Igneous Activity (Grade 10 NSC Matric Geography): Flashcards
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10 cards from this deck
Igneous intrusions
Igneous intrusions
Rock features from magma cooling within Earth's crust
Largest & deepest igneous intrusions
Largest & deepest igneous intrusions
Batholiths
Most common rock type in batholiths
Most common rock type in batholiths
Granite
Shape of laccoliths
Shape of laccoliths
Dome-shaped intrusions pushing up overlying rock layers
Direction dykes cut through rock
Direction dykes cut through rock
Vertically
Direction sills run in rock
Direction sills run in rock
Horizontally between rock strata
Shape of volcanic pipes
Shape of volcanic pipes
Carrot-shaped intrusions
Crystal size in deep intrusions
Crystal size in deep intrusions
Large - slow cooling allows minerals time to grow
How intrusive features become visible
How intrusive features become visible
Weathering & erosion remove overlying rocks over millions of yrs
Rock commonly found in dykes
Rock commonly found in dykes
Dolerite