1. Using the image of the cross section of the Grand Canyon on this worksheet, explain the geologic history of the area. You will start with the layer Vishnu Schist and end with the Redwall Limestone. Make your answers in bulleted points or just follow the numbers and list each change. You do not have to do the entire picture! Your job is to list the name of the layers starting at the bottom and move your way up. You also need to give the environmental changes that occur in each layer and include detail in your responses similar to what is found in the example from live class. Look at the cross section key at the bottom of the worksheet for help. 20pts.