In her book Earthly Delights from the Garden of France:The Wines of the Loire:Volume One: The Kingdom of Sauvignon Blanc: Sancerre, Pouilly-Fume and the Sauvignon Satellites Jacqueline Freiderich talks about the Kimmeridgian soils of the Aube in Champagne, Sancerre and Chablis suggesting the regions have more in common than not.
So I want to see if anyone has any recommendations for producers.
Not to take this conversation off-track of getting good producer recommendations, but I would be careful in making assumptions about wine quality based on its soil being of a specific human-categorized geological time era. Kimmeridgian refers to a time in the upper Jurassic between 152 and 157 million years ago. For example, a lot of North Sea oil is Kimmeridgian, and you probably don't want to grow wine in it. The reason the best Chablis is grown on Kimmeridgian probably has more do with the prime aspect that just happens to be exposing soil of that era. The Oxfordian just before and Tithonian just after, made perfectly good dirt—even if the names are not as marketable to wine aficionados.