What Kind of Rock Is This?
ES0610  Rock Layering

  !   Read the questions below each image. If your answer to the question is yes, click the blue text to go to the next step to identify the rock.

Matthew Nyman, TERC
Is layering defined by dark and light minerals in wavy parallel bands?
Matthew Nyman, TERC
Is layering defined by changes in grain size or color? Is the layering continuous?
Matthew Nyman, TERC
Is the layering defined by shiny, thin layers?

If your rock sample does not have any of the features described on this page, reexamine the rock with a hand lens or magnifying glass. Look at the sample from all angles. Concentrate on fresh surfaces where you might be able to better determine the texture. Return to the beginning of the rock identification key and start over again.