1. (20 pts) Sketch a diagram showing the structure of the earth. Make
a table and define the boundaries of each region by
b. temperature and
Be sure to include the surface and the center of the earth in your answer.
2. (20 pts) For each illustration:
a) Identify the structures that are illustrated.
b) Provide representative chemical formula for each.
c) From which region of the earth is this mineral most likely to occur.
a. Draw the ternary diagram of the feldspars.
b. Describe and explain their mixing properties.
a. Using the positions of the lines that indicate the 410, 520 and 660 km discontinuities, determine the values of P and T at these discontinuities.
b. Draw the geotherm onto the figure.
c. Label the regions of the lower and upper mantles and the transition zone.
Estimate the percentage of olivine in the mantle from this diagram.