Calculate the temperatures T1 , T2 , and T 3 at distances x 1 , x 2 , and x 3 from the\ center of a 1 km thick basaltic intrusion after 4000 years. Assuming a lithostatic\ pressure of 0.5 kb (0.05 GPa), what metamorphic facies would you expect to find\ at each location? Use the facies diagram on the next page (and/or Figure 15.4 in\ your book).\ 2. Draw a diagram depicting the intrusion. Do NOT make a plot of temperature vs.\ distance, but rather map out the intrusion as if you were looking at it in cross\ section. If you are not sure what this means, ask! Make sure that everything is\ drawn neatly and to scale. Graph paper may be helpful. Draw isotherms at 100 \ intervals based on your calculations in part 2a (e.g., 600 , 500 , 400 , etc.). Draw\ an arrow showing the direction of increasing metamorphic grade. Clearly label\ all elements of the diagram, including the metamorphic facies.\ T S 1200 C\ h 500 m\ x 1 500 m\ x 2 700 m\ x 3 900 m\ 10-6 m2 /s\ t 4000 yr\ intrusion country rock