The polar ice capes, the change in genetics of certain animal fossils (growing more or less hair, etc. etc.)
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
A) WHERE ARE THE PEOPLE
B)WHERE IS THE POPULATION GROWING
C)WHY IS THE POPULATION GROWING
