igneous rocks. granite is a very hard rock. it does not weather easily. it is mined from granite...
TRANSCRIPT
Igneous Rocks
Granite is a very hard rock. It does NOT weather easily. It is mined from granite
quarries.
Granite has many uses.
more uses
….and my favorite!
Igneous Rocks form from volcanoes.
• Intrusive• Cooled trapped
magma inside Earth• Cools slowly• Has crystals
• Extrusive• Cooled lava
outside of Earth• Cools quickly• Few, if any
crystals
Most igneous rocks are made of silicate materials.
• High silica composition makes a rock light colored. (Highlight – like a highlighter)
• Low silica composition makes a rock dark colored.
You decide.Intrusive or Extrusive Rock
orHigh Silica or Low Silica
Composition
Igneous Rock
Crystal Size (Large/many or Small/few)
Light or Dark
colored (Silica Content)
Intrusive or Extrusive/ High or Low Silica
DioriteGraniteObsidianPumiceGabbroBasaltAndesite
Set up a data table like this one.
Granite
Igneous Rock
Crystal Size (Large/many or small/few)
Light or Dark
(Silica Content)
Intrusive or Extrusive/ High or Low Silica
Diorite Large (many) Light Intrusive/highGranite Large (many) Light Intrusive/highObsidian none Dark Extrusive/nonePumice Few/none light Extrusive/highGabbro Large (many) Dark Intrusive/lowBasalt none Dark Extrusive/lowAndesite none light Extrusive/high
Check your responses.
What type of Igneous Rock is Stone Mountain?
You got it! You are a geologist – someone that studies the Earth!!!!
• Developed by C. Warren