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.)

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 61S 59S 80N 68N 63N 88N 78N 60S 61N 56S Pitch of slickenlines 80E 80W 58W 78W 78W 59W 65W 80W 86E 88E