The table below lists measurements from 10 normal faults in a small area on the island of Crete (Angelier, 1979). Plot the data on an equal-area net and determine the orientation of the principal stresses. (In reality, 10 faults are not enough to reliably determine the orientation of the stress ellipsoid; ideally, about 40 should be used.)

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Fault number I 23456 6 7 8 9 10 Strike of fault 045° 036° 090° 052° 045° 110° 074° 046° 077° 067° Dip of fault 61°S 59°S 80°N 68°N 63°N 88°N 78°N 60°S 61°N 56°S Pitch of slickenlines 80°E 80°W 58°W 78°W 78°W 59°W 65°W 80°W 86°E 88°E