They show that there was an ocean over the plains long ago, and fossils are always used to elaborate on the history of life/how it developed.
A method of measuring time based on time at the prime meridian/ ... Title, legend, grid system, direction, scale ... If you wanted to draw a map for the purpose of telling time, how many degrees ...
They have less-runny lava, meaning that it doesn't travel as far before cooling, meaning that the layers build up more steeply, but don't go out as far. You also get layers of ash on the composite volcano to help build it up too
The answer is A.) Deflation
