Geology                     Natural Science 1003

Topics

6.1  Terms  

• Terms: igneous; magma; lava; volcanic; extrustive; plutonic; intrusive

6.2  Classifying igneous rocks

• Terms: texture; grain  

Analytical: How does texture/grain size tell us how fast a rock cooled?

• Analytical: How does texture/grain size tell us if a rock cooled above ground or below ground?

• Explanation: How do we use mineral composition to classify igneous rocks?

• Explanation: How do we use color to classify igneous rocks?

6.3  Igneous rock types

• Igneous rock chart

• Terms: basalt; gabbro; andesite; diorite; rhyolite; granite; peridotite; obsidian

6.4  Some igneous rock characteristics

• Terms: porphyry; vesicle

• Process: How does porphyry form in igneous rocks?

• Process: How do vesicles form in igneous rocks?

• Process: How do agates form in igneous rocks?

Topic resources for students

Entire topic

• Prof. Nelson rocks notes

• Geology Class

Links for further interest

6.2  Classifying igneous rocks

• Photomicrographs