Igneous Rock Textures

Random Science or rock Quiz

Can you name the Igneous Rock Textures?

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Size of Crystals/OptionsTexture/Formation MethodExample
Small CrystalsBasalt
How is it formed? #1) Extrusively #2) Intrusively #3) Both
Large CrystalsGranite
How is it formed? #1) Extrusively #2) Intrusively #3) Both
Tiny CrystalsObsidian
How is it formed? #1) Extrusively, fastest cooling #2) Extrusively and Intrusively #3) Extrusively, with gas pockets
Many Small Pockets, Small CrystalsPumice
How is it formed? #1) Very fast cooling #2) Gas bubbles in a runnier lava #3) Gas bubbles in a thicker lava
Small Crystals, Some Larger PocketsScoria
How is it formed? #1) Very fast cooling #2) Gas bubbles in a runnier lava #3) Gas bubbles in a thicker lava
Some Small Crystals and Some Large CrystalsAndesite, commonly
How is it formed? #1) Intrusively #2) Extrusively #3) Both

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