Biology is far more intertwined with geology than that. Paleontology is extremely important in determining the relative age of rock units and features through marker fossils, which are time limited but geographically ubiquitous. Charles Darwin was a geologist first, and his journey on the HMS Beagle allowed him to find various fossils that eventually led him to developing the theory of evolution by natural selection.

There is so much more connection between the two sciences than you might think.