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Science Bowl Question

📅 NSB 2019🎓 HS🔄 Round 8#️⃣ Q13🌟 BONUS📝 Multiple Choice

Which of the following is an example of a porphyroblast?

W) A fragment of country rock preserved in a granitic intrusion
X) A well-preserved trilobite fossil in shale
Y) A rock deposited on the seafloor from the melting of sea ice
Z) A large garnet in a fine-grained metamorphic schist
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