Do you have cats? Have you ever smelled raw clay kitty litter? How about putting your face right down into a somewhat used litter box filled with clay kitty litter? Do it. Then take a big, deep whiff and register what you smell.
Chances are, you smell clay, dust, cat pee, and possibly something more. Chances are, you also smell the nose elements of a fine Chardonnay from Burgundy. Clay, limestone, manure and the acidity and essence of cat urine can all be odor characteristics of fine French wine.
