Rerer to the igure below. which age below most closely approximates the time at which the continental crust of antarctica and australia (along line b) separated and the first oceanic crust was formed? 30 -30 -60 30 60 90 120 150 180 210 240 270 300 330 0.0 10.9 20.1 33.1 47.9 s5.9 67. 40.1 81.5 age (ma) 147.7 120.4 131.9 126.7 139.6 180.0 1543 less than 11 million years ago million years ago about 50 million years ago about 80 million years ago about 150 million years ago