1 / 14

METAMORPHIC ROCKS

METAMORPHIC ROCKS. What is a metamorphic rock? Metamorphic rocks form after another rock is subjected to extreme heat and/or pressure and that changes its physical characteristics. Metamorphic Rocks Appear Similar to Their Parent Rocks

fell
Télécharger la présentation

METAMORPHIC 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. METAMORPHIC ROCKS

  2. What is a metamorphic rock? • Metamorphic rocks form after another rock is subjected to extreme heat and/or pressure and that changes its physical characteristics

  3. Metamorphic Rocks Appear Similar to Their Parent Rocks • A metamorphic rock will often resemble the rock it transformed from (parent rock)

  4. Where does the heat and pressure come from? • Heat and pressure can originate from Earth’s internal heat, weight of rocks above, and folding in mountain building

  5. How does the rock change? • Minerals recrystallize or deform

  6. Textures of Metamorphic Rocks • Foliated • Nonfoliated

  7. Foliated Metamorphic Rocks • Mineral grains have aligned due to heat and direct pressure • Sometimes the minerals are so aligned, they form bands in the rock, this is known as banding

  8. NonfoliatedMetamorphic Rocks • Mineral grains are heated and compressed usually to a higher density

  9. 2 Types of Metamorphism • Regional • Local

  10. Regional Metamorphism • Metamorphism of rocks over a large area due to pressure, common in folded mountains

  11. Local Metamorphism • Metamorphism of rocks over a smaller area due to contact with magma

More Related