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What Size Is the Crystal in an Intrusive Igneous Rock

Name: What Size Is the Crystal in an Intrusive Igneous Rock
Uploaded: 2026-10-19T15:09:56+00:00
Duration: 12 min 54 s
Description: Igneous Rocks May Be Simply Classified According to Their Chemical/Mineral Composition as Felsic, Intermediate, Mafic, and Ultramafic, and by Texture or Grain S

David Miller • Oct 19, 2026 • 9 min read

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Igneous Rocks May Be Simply Classified According to Their Chemical/Mineral Composition as Felsic, Intermediate, Mafic, and Ultramafic, and by Texture or Grain Size: Intrusive Rocks Are Course Grained (All Crystals Are Visible to the Naked Eye) While Extrusive Rocks May Be Fine-Grained (Microscopic Crystals) or Glass ( …

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David Miller

David Miller brings 15 years of experience in global economics, personal finance strategy, and market dynamics. He specializes in turning complex economic trends into actionable insights for everyday readers.