The world renowned geologist, Dr. Matt A. Morphic has been asked by the United States Geological Survey (USGS) to create an informative display on the three types of rocks for their museum in Denver, Colorado. Unfortunately, Dr. Morphic is stuck "between a rock and a hard place"! He has been so busy planning his speech for opening night, that he hasn't started on the exhibit! As amateur geologists, Dr. Morphic has asked for your help in completing his display.