Intrusive Volcanic Activity Flashcards
Volcanoes are ________ in the earths crust through which ____, ___, and ______ erupt.
openings lava, ash, gasses
Volcanoes are ________ in the earths crust through which ____, ___, and ______ erupt.
openings lava, ash, gasses
Intrusive volcanic activity takes place _______ the earths surface
beneath
Intrusive volcanic activity includes the formation of _____,_____, and __________
sills, dykes and batholiths
When large chambers of magma cool underground they forms large domes of _______ rock called __________
igneous batholiths
Batholiths such as the ______ ______batholith in California can become _______if the rock layers above them are eroded away
Sierra Nevada exposed
Sometimes magma can flow into gaps in the surrounding rock and cool, forming vertical dykes _____the layers of rock and horizontal sills -_______ the layers of rock
across between
Dykes are ________ and sills are__________
vertical horizontal
Cracks may form as the magma cools - these are called…
cooling cracks
In a sill they’re…
horizontal
In a dyke they’re
vertical
Intrusive volcanic activity takes place _______ the earths surface
beneath
Intrusive volcanic activity includes the formation of _____,_____, and __________
sills, dykes and batholiths
When large chambers of magma cool underground they forms large domes of _______ rock called __________
igneous batholiths
Batholiths such as the ______ ______batholith in California can become _______if the rock layers above them are eroded away
Sierra Nevada exposed
