From Cretaceous Fossils to the Depths of Ouessant: When Vertus Chalk Returns to the Ocean
Gazing upon a bottle encrusted with marine barnacles retrieved from the seabed of Ushant means witnessing an astonishing geological circle. Many people wonder at the natural affinity connecting fine Champagne with the open ocean. Yet for anyone who understands Champagne's subsoil, this marriage of earth and sea is an age-old destiny: by diving beneath the waves, the wine simply returns to its ancestral womb.
An ancient ocean beneath the vineyards of Vertus
One hundred million years ago, during the Cretaceous era, Champagne was not the rolling green landscape we know today. It lay beneath a warm tropical sea populated by abundant marine life. Over eons, billions of microscopic coccolith shells and the bullet-shaped calcified guards of belemnites — prehistoric ancestors of cuttlefish — settled upon the sea floor.
Under geological heat and pressure, this sediment transformed into the world-famous belemnite chalk that forms the backbone of the Côte des Blancs and the Premier Cru terroir of Vertus.
Marine memory transferred to Chardonnay vines
This chalk is far more than inert stone: it is a living hydraulic reservoir. Capable of absorbing up to 300 litres of water per cubic metre during winter rains, it releases this moisture drop by drop to the deep root systems of our old Chardonnay vines throughout the heat of summer.
It is from this fossilised seabed that our grapes draw their signature profile: crystalline minerality, mouth-watering freshness, and that subtle, mouth-watering saline edge that characterises premier blanc de blancs.
Closing the cycle at Ushant
When we lower our cages sixty metres into the Bay of Stiff off Ushant, the circle closes. A wine born of sap drawn from 100-million-year-old fossilised seashells returns to rest in living seawater. Living barnacles (Balanus crenatus) colonise the glass, building a living bridge between prehistory and today's ocean.
Explore this tribute to nature and geology in our dedicated Immersion Edition.
Frequently asked questions
What are the belemnites found in Vertus chalk?
Belemnites were prehistoric cephalopods of the Mesozoic era. Their fossilised guards make up a significant portion of the chalk subsoil across the Côte des Blancs.
Does chalk truly affect Champagne flavour?
Yes. Chalk regulates water intake with pinpoint precision and enriches the vines with calcium and minerals, producing crisp acidity and a refined mineral finish.
What does the immersion at Ushant symbolise?
It bridges the prehistoric ocean that created our Champagne soil with the modern ocean that refines our wine.