Layers of soil are known as what?

More Questions:

What classic novel's subtitle is "Life Among the Lowly"?

Who wrote the book "Jaws"?

On the bank of which river does the Portuguese capital of Lisbon stand?

Which European country replaced the Tolar with the Euro?

Which missionary was the first European to discover Victoria Falls?

What English city was once known to the Romans as Venta Belgarum?

What is the Maximum Incremental Reactivity (MIR) a measure of?

In what century did the Dodo bird become extinct?

Azote is an old name for what element?

What is the name of the band with the members Jack Black and Kyle Gass?

Whose first album was titled "The Divine Miss M"?

What silent film star was "The Tramp"?

What year was actor Mel Gibson born?

What is the singer Meat Loafs real name?

Which king decided to transform Versailles into a royal court in 1661?