• Stage 1: Steep climbs

    Stage 1: Steep climbs

    In the Basque Country where we start the Tour de France 2023 big geological events lead to steep climbs over millions of years.

  • Stage 2: Karst

    Stage 2: Karst

    You don’t always need big geological events for breathtaking scenery. Sometimes the subtle influence of karst can make all the difference.

  • Stage 3: Treasure trove

    Stage 3: Treasure trove

    Zumaia is a treasure trove where giant clams tell us what time it is and what exactly happened right here seeing through time.

  • Stage 4: Invisible mountains of salt

    Stage 4: Invisible mountains of salt

    Invisible mountains of salt of the Hors Category underneath the Tour de France stage 4 won’t get you any polkadot points

  • Stage 5: Mountain jersey

    Stage 5: Mountain jersey

    The mountain jersey in the Tour de France is white with red dots but it should actually be green with red dots. Let us explain why.

  • Stage 6: Wilson

    Stage 6: Wilson

    Wilson? Is there a guy named Wilson in the Tour? Not as far as we know but Wilson does play an important role in the area we are racing in.

  • Stage 7: A glass of wine

    Stage 7: A glass of wine

    A glass of wine with millions and millions of years of history. The secret is all in the soil of the Bordeaux region.

  • Stage 8: A mysterious meteorite crater

    Stage 8: A mysterious meteorite crater

    A mysterious meteorite crater in the south of France proves many things and leaves even more questions.

  • Stage 9: Explosive days

    Stage 9: Explosive days

    Explosive days are common in the mountains during the Tour de France. The Puy de Dome is particularly explosive due to its rich geological history.

  • Stage 10: A fiery mystery

    Stage 10: A fiery mystery

    Why are there volcanoes in the Massif central. That’s a bit of a mystery, a fiery mystery so to speak. We give you some clues!

  • Stage 11: White jersey

    Stage 11: White jersey

    The white jersey is one of the four coveted jerseys in the Tour de France. Today we explore white from kaolinite and battery power on the course.

  • Stage 12: Devonian Park

    Stage 12: Devonian Park

    Devonian Park sounds like a lovely place to take a stroll? Well not exactly. Join us on a voyage through hundreds of millions of years and to the ocean that spanned across France.

  • Stage 13: Frog legs and dinosaur feet?

    Stage 13: Frog legs and dinosaur feet?

    On today’s stage we find ponds with frog legs and traces of dinosaur feet indicating gigantic animals. Or were they?

  • Stage 14: Force of nature

    Stage 14: Force of nature

    Tour de France riders can be a force of nature. Today’s mountain stage shows us the gigantic forces that created mountain ranges.

  • Stage 15: Mighty mountains

    Stage 15: Mighty mountains

    Mighty mountains on today’s route and during the many helicopter shots that we will get to see. However, never forget the dangers.

  • Stage 16: A short history of

    Stage 16: A short history of

    Stage 16 is only a short one but the history leading to the scenery we see today is all but a short history.

  • Stage 17: Water and ice

    Stage 17: Water and ice

    There is no place where water and ice play such a big role in the Tour de France as today. Climate change sadly also does.

  • Stage 18: A change of scenery

    Stage 18: A change of scenery

    A change of scenery from the high Alps to the Bresse Basin. We meet tablecloths, dinosaurs and big salt deposits today.

  • Stage 19: Big feet

    Stage 19: Big feet

    We race through the Jura and find traces of the Jurassic age of dinosaurs. But did their big feet really leave three-meter wide footprints?

  • Stage 20: It’s complicated

    Stage 20: It’s complicated

    The geology of the region we are racing in today is complicated. And so is our blog but after 20 days of Tour de France geology, you are basically experts.

  • Stage 21: Toads

    Stage 21: Toads

    Toad? Super Mario? On today’s stage on the Champs Elysées. It sounds weird but the history of the ‘Champs’ goes back 600 million years.

  • Stage 1: Volcanic cathedral

    Stage 1: Volcanic cathedral

    At the Grand Départ in Clermont Ferrand we find a volcanic cathedral built with materials from the nearby Chaine des Puys.

  • Stage 2: Sparks

    Stage 2: Sparks

    Another of volcanoes in the Massif Central but the sparks have long gone. Hopefully the race will add some sparks!

  • Stage 3: Hard rocks

    Stage 3: Hard rocks

    Eclogite is one of the hardest rocks there is. Yvonne Brière used these hard rocks to prove her thesis to become a female pioneer in geology.

  • Stage 4: Fossils

    Stage 4: Fossils

    Fossils can be found in all of France. We find a lot along the Lot river in today’s stage due to the special geological circumstances here.

  • Stage 5: Rock it

    Stage 5: Rock it

    Our race course today will rock it. Literally. The geological history of the Tarn and Aveyron at your footsteps, or wheels.

  • Stage 6: Eels

    Stage 6: Eels

    Conodonts are eel-like animals but they are extinct. The last fact helps us learn about geological time scales in great precision.

  • Stage 7: Stressed

    Stage 7: Stressed

    Mountain are like people. They get stressed and sometimes even a complete meltdown. The Pyrenees show what happened then.

  • Stage 8: The future of the past

    Stage 8: The future of the past

    The future of the past is a bit cryptic. It’s where geology comes in to predict the future climates looking at the past.

  • Geology of the Glasgow World Championships 2023 

    Geology of the Glasgow World Championships 2023 

    Can you imagine a world where Scotland and England are two different beasties? Geologically speaking, that is – we won’t get into any other debates, We promise! So, here’s the scoop: way back when, the Scottish Highlands and England were part of two ancient continents. Scotland was part of Laurentia which was North America and…

  • Geology of the Deutschland Tour

    Geology of the Deutschland Tour

    Ger­many has everything to of­fer for fans of both geo­logy and cyc­ling. While sed­i­ments are cur­rently ac­cu­mu­lat­ing in the Ger­man Wad­den Sea, the old­est rocks in Ger­many formed more than two bil­lion years ago. In-between these two ex­tremes, there are rocks and sed­i­ments that tell us a story about ice ages, sea level change, moun­tain…

  • Geology of the Vuelta a España

    Geology of the Vuelta a España

    After the Tour de France we want to take you to Spain for the geology of the Vuelta a Espana that starts on Saturday 26 August in Barcelona. In general, there is a direct correlation between the geology of the Vuelta course and the winner of the stage. Stages leading through sedimentary basins – think…

  • Geology of Il Lombardia

    Geology of Il Lombardia

    The geology of Il Lombardia brings us beautiful lakes, ancient oceans, and a mysterious creature in the water.

  • Geology of Milan-Sanremo

    Geology of Milan-Sanremo

    We explore the geology of Milan-Sanremo with lost oceans, colliding continents plus a bit of risotto and wine.

  • Geology of the Tour of Flanders

    Geology of the Tour of Flanders

    Not often is a quiet road big news but the land slide at the Paterberg ties geology and the Tour of Flanders together.

  • Geology of Paris-Roubaix

    Geology of Paris-Roubaix

    Geology can literally be found on the faces of the riders in Paris-Roubaix. We take you through the cycle of the dust.

  • Geology of the Amstel Gold Race

    Geology of the Amstel Gold Race

    In the only true Dutch spring classic, riders enjoy the beautiful scenery of South Limburg during the Amstel Gold Race. The region is known for its hills. This makes it very suitable for a cycling race! Besides these differences in altitude, which are particularly large for the Netherlands and result in many sore legs, the…

  • Geology of Liège-Bastogne-Liège

    Geology of Liège-Bastogne-Liège

    Normally you expect mountains and then rivers cutting through them creating climbs and valleys? Not in the geology of Liège-Bastogne-Liège.

  • Geology of the Giro d’Italia

    Geology of the Giro d’Italia

    The first Grand Tour of the calendar year brings the peloton to Italy. Even more than in the other two grand tours, we can actually predict the type of stage winner from the geology. The climbers and puncheurs will win in Europe, and the sprinters in Africa. To explain this we bring you the geology…

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