Metamorphic Rocks

Introduction

Metamorphic rocks are, simply put, rocks that are “changed”.  That is they started out as igneous, sedimentary or other metamorphic rocks and through one or more of the processes of burial, heating or pressurization they have been transformed into new types of rocks.  Use the supplied “Metamorphic Rocks Supplemental Information” sheet and webpage/videos linked below to answer the questions in this lab.  Have fun!!!

Informational/Lab Webpage: http://profharwood.x10host.com/GEOL101/Labs/Metamorf/index.htm

Metamorphic Rock Identification Video: https://www.youtube.com/watch?v=HUydPhIaQQU

Supplemental Information Sheet: Supplied on Canvas!!

  1. Define the following terms in your own words:
    1. Metamorphic Rock:
    2. Foliated Metamorphic Rocks:
    3. Non-foliated Metamorphic Rocks:
    4. Regional Metamorphism:
    5. Contact Metamorphism:
    6. Metamorphic Grade:

 

  1. Using the tables provided in the Supplemental Information Packet and the information provided in your textbook and the video linked above, complete the following table by using the provided descriptions to evaluate: 1) whether the rock is foliated or non-foliated, 2) parent rock name, 3) metamorphic rock name, and 4) provide a picture from an online resource. The first row is completed for you.
  Description Foliated

Or

Non-foliated

 Parent Rock Name Metamorphic Rock Name Picture
1. Fizzes in acid, white color. Non- foliated Limestone Marble
2. Dull luster, breaks into flat surfaces, fine-grained        
3. Large crystals.  Very shiny with slightly wavy surfaces.  Garnet present        
4. Lots of quartz, scratches glass.  No fizz in acid.  Looks like a solid mass of crystals        
5. Dark silver, writes on paper        
6. Looks like snakeskin, softer than glass.        
7. Minerals separated into layers, rock looks striped        
8. Fine-grained crystals, shiny luster        
9. Dark, fine-grained rock produced by contact metamorphism. Scratches glass.  Looks like basalt        
10. Scratches glass.  Abundant feldspar and amphibole        
11. Low density, organic matter, black        

 

  1. Visit the interactive Lab Webpage linked here:

http://profharwood.x10host.com/GEOL101/Labs/Metamorf/index.htm

At the bottom of the page are 8 “Samples to Identify”.  Visit the pages for each of the 8 samples and supply your responses in the table below.  Copy and paste the rock pictures provided on the webpage for each sample in the final column of the table.