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18.3 – Intrusive Activity. http://3dparks.wr.usgs.gov/2005/lakemead/images/volcanic.gif. Plutons. Intrusive igneous rock body, including \_\_\_\_\_\_\_\_\_\_, \_\_\_\_\_\_\_\_,sills & dikes Formed through \_\_\_\_\_\_\_\_\_\_\_-building processes and \_\_\_\_\_\_\_\_\_\_\_-oceanic collisions

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18 3 intrusive activity

18.3 – Intrusive Activity

http://3dparks.wr.usgs.gov/2005/lakemead/images/volcanic.gif

plutons
Plutons
  • Intrusive igneous rock body, including __________, ________,sills & dikes
  • Formed through ___________-building processes and ___________-oceanic collisions
  • Can be __________ at Earth’s surface to uplift and erosion

http://www.geo.hunter.cuny.edu/bight/images/pluton.jpg

batholiths stocks
Batholiths & Stocks
  • The _______ plutons are called Batholiths.
  • Batholiths are _________-grained, irregularly shaped, igneous rock mass that covers at least ________ km2
  • Stocks are ___________ shaped plutons but ___________ in size.
  • Both generally form 5-______ km below Earth’s surface and are _________ in the interior of major _____________ chains
laccoliths
Laccoliths
  • Relatively _____________
  • ____________-shaped pluton that forms when magma ___________ into parallel rock layers ________ to Earth’s surface
  • Laccoliths have

________ bottoms

and ___________

tops.

http://www.indiana.edu/~geol105/images/gaia_chapter_5/dike&sill.jpg

sills
Sills
  • Pluton that forms when magma ________ parallel rock ______________

http://www.austmus.gov.au/geoscience/images/earth_diagrams/volcano_structure.gif

dikes
Dikes
  • Pluton that cuts __________ preexisting rocks and often forms when magma ____________ cracks in surrounding rock ____________

http://www.waipahums.k12.hi.us/eportfolio05-06/wisportfolio05-06/team8d_portfolios/y_kenneth_e_portfolio/volcano_files/image002.png

plutons tectonics
Plutons & Tectonics
  • ____________ plutons form as the result of _____________-building processes.
  • Plutons are thought to form as a result of _________________-continental and ___________-continental convergence.
reinforcement
Reinforcement
  • T/F
  • Batholiths are common in the interiors of mountain chains.
  • Laccoliths have curved bottoms and flat tops.
  • Sills form when magma is forced between rock layers.
  • Most igneous activity occurs deep within earth.
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