1 / 5

Earth Science

Earth Science. Section 3-7 How are metamorphic rocks classified?. Classifying Metamorphic rocks. Petrologists (those who study rocks, and how they are formed) classify metamorphic rocks based on the texture of the rock.

adora
Download Presentation

Earth Science

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. Earth Science Section 3-7 How are metamorphic rocks classified?

  2. Classifying Metamorphic rocks • Petrologists (those who study rocks, and how they are formed) classify metamorphic rocks based on the texture of the rock. • Metamorphic rocks have 2 kinds of textures: foliated, and nonfoliated.

  3. Branded Metamorphic Rocks • Foliated Texture: The mineral crystals in foliated metamorphic rocks are arranged in bands.—These rocks tend to break along the crystal bands. • Foliated rocks are formed when existing ricks are placed under great heat and pressure until they melt and recrystallize into mineral that form bands • EX: Gneiss, Schist

  4. Metamorphic Rocks Without Bands • Nonfoliated Rocks: Metamorphic Rocks that don’t have their minerals arranged in bands. • Nonfoliated Rocks do not break into layers. • EX: Marble and Quartzite

More Related