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Devils Tower is primarily made of a greenish rock called phonolite. The Giant's Causeway is made of a black rock called basalt. green rock with flecks of white and red and fine-grained black rock Compare
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Devils Tower is primarily made of a greenish rock called phonolite. The Giant's Causeway is made of a black rock called basalt.

green rock with flecks of white and red and fine-grained black rock

Compare the appearance of the two rocks. What do their appearances suggest about the composition of each rock?

User Tim Maxey
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13 votes

Answer:

One of the rocks seems to be made of more than one mineral. This could suggest that it is a METAMORPHIC rock. Basalt would be an IGNEUS rock! Hope this helped!

Step-by-step explanation:

User Towi
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