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METAMORPHIC ROCKS
Watch the following Youtube video in full:
https://www.youtube.com/watch?v=Ncr-46YX-N0
Use your textbook or internet to answer the following questions:
First write a summary about the video!
(It should contain parts from the beginning, middle, and end of the video - 250 words)Find the image of the following rocks Slate, Phyllite, Schist, and Gneiss in your textbook or any scientific viable internet source (a good link is https://geology.com) and insert the images in corresponding field.
| Texture | Grain Size | Characteristics | Grade of Metamorphism (low-intermediate-high) | Rock Name |
| Foliated | Slate | |||
| Foliated | Phyllite | |||
| Foliated | Schist | |||
| Foliated | Gneiss | |||
| Non-foliated | Quartzite | |||
| Non-foliated | Marble |
| Texture | Grain Size | Characteristics | Name |
| FOLIATED | Very Fine | Dull Luster Hard Flat Sheets High Frequency “Ping” | SLATE |
| Fine | Wrinkled or Wavy Layers Metallic Luster Few Larger Crystals | PHYLLITE | |
| Medium to Coarse | Visible Sparkling Platy Minerals (Micas) | SCHIST | |
| Medium to Coarse | Alternating Bands of Light and Dark | GNEISS | |
| NON-FOLIATED | Fine to Medium | Calcite (Fizz with HCl) Hardness = 3 | MARBLE |
| Fine to Medium | Quartz Hardness = 7 | META-QUARTZITE |
The foliation shows the intensity or grade of metamorphism (the amount of heat and pressure the rocks were exposed to). The image below shows how shale or slate would change at different grade of metamorphism.
