What I found is that it is certainly difficult to get past its outer crust.

Yet these people were quite similar to types of the outer crust.

The man from the outer crust watched the trim, clean cut figure of the girl as she made her way toward the wood.

The man from the outer crust watched them with but little interest and only casual curiosity.

Thus had been the outer crust at one time.

"I am not at all sure that I care to return to the outer crust," he said.

We couldn't have crowded half of it into a lifetime on the outer crust.

However, much of it has come down intact for perhaps a million years to the present day on the outer crust.

Directly under the outer crust is the mantle, the largest layer of the earth.

Where the oceans are upon the outer crust, is land here.