According to Vander Gracht, the maximum depth of the layer above is:
A. 1,200 km
B. 60 km
C. 2,900 km
D. 200 km
Answer:B
According to Vander Gracht, the maximum depth of the layer above is:
A. 1,200 km B. 60 km C. 2,900 km D. 200 km