1 / 17

Igneous rocks

Igneous rocks. Sources. Decay of radioactive materials Heat left over from Earth’s formation. Formation of Igneous Rock. Heat melts rock into magma or lava then cools & hardens. Formation of Igneous Rock. Extrusive Rock . Intrusive rock. How Igneous Formed Intrusive rock.

amy
Download Presentation

Igneous rocks

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Igneousrocks

  2. Sources • Decay of radioactive materials • Heat left over from Earth’s formation

  3. Formation of Igneous Rock • Heat melts rock into magma or lava then cools & hardens

  4. Formation of Igneous Rock • Extrusive Rock • Intrusive rock

  5. How Igneous FormedIntrusive rock • Beneath surface • Cools slowly

  6. How Igneous FormedIntrusive rock • Large (coarse)grains (crystals) • Gabbro • Granite • Diorite • Mineral grains

  7. How Igneous FormedExtrusive Rock • On surface • Cools rapidly

  8. How Igneous FormedExtrusive Rock • Mineral grains • Small (fine)grains (crystals) • Basalt • Rhyolite • Andesite

  9. How Igneous FormedExtrusive Rock • Few or no grains • volcanic glass • Obsidian • Pumice • Scoria

  10. Type of MagmaBasaltic • Composition • Density • Color • Melting point • Example • Lot of iron and magnesium little silica • Dense • Dark • Fluid and free flowing • Hawaii

  11. Type of MagmaBasaltic

  12. Type of MagmaGranitic • Composition • Density • Color • Melting point • Lot of silica little iron and magnesium • Less dense • Light • Thick, stiff, lot of pressure, very explosive

  13. Type of MagmaGranitic

  14. Type of MagmaAndesitic • Composition • Density • Melting point • Example • Balance amount of minerals and density • Sticky lava explosive • Rim of Pacific Ocean

  15. Type of MagmaAndesitic

  16. Which kind of magma?

More Related