Image: From Brenna Quigley

There are millions of years between the geology depicted on the left and the naming of appellations on the right, but the overlap is not a coincidence.

Images from Wikipedia and Wine Folly.

To understand the connection, listen to Levi Dalton’s podcast with Brenna Quigley.  It was one of the most enlightening things I’ve come across on soil, minerals and terroir.