Is dating different from relationship


03-Feb-2016 15:10

The simplest situation for a geologist is a "layer cake" succession of sedimentary or extrusive igneous rock units arranged in nearly horizontal layers.

In this situation, the cave contents are younger than both the bedrock below the cave and the suspended roof above.

They are applied by geologists in the same sense that a "null hypothesis" is in statistics -- not necessarily correct, just testable.