The Ultimate Rock Star History: How the “Age of Dinosaurs” Got Its Weird Names 🦕

Ever looked at a map of England and wondered why a 95-mile stretch of beaches is called the Jurassic Coast? Or why a Hollywood movie about a T-Rex is named after the Jurassic period, even though T-Rex actually lived millions of years later?

To solve that mystery, we have to travel back to the 1800s. Long before smartphones, scientists called geologists were playing the ultimate game of real-world Minecraft. They dug through the Earth, found bizarre fossils, and looked at layers of rock to figure out our planet’s history.

Here is the secret origin story of how three epic time periods—the Triassic, Jurassic, and Cretaceous—got their names.

🧱 1. The Triassic Period (Named in 1834)

• The Brains Behind It: A German geologist named Friedrich August von Alberti.

• The Backstory: Alberti was looking at the ground in Germany and noticed a repeating pattern. Wherever he dug, he found a distinct stack of three completely different rock layers: red sandstone on the bottom, limestone in the middle, and colourful clay on top.

• The Name: Because it was a perfect triple-threat combo, he called it the “Trias” (which just means “triad” or “group of three”). Over time, it became the Triassic.

⛰️ 2. The Jurassic Period (Named in 1829)

• The Brains Behind It: A famous German explorer named Alexander von Humboldt and a French scientist named Alexandre Brongniart.

• The Backstory: Back in 1799, Humboldt was hiking through the spectacular Jura Mountains on the border of France and Switzerland. He noticed a massive ridge of unique marine limestone packed with sea fossils. Thirty years later, Brongniart formalised the science, writing a paper about these terrains jurassiques.

• The Name: It literally means “from the Jura Mountains.” So, every time you watch Jurassic Park, you are secretly shouting out a mountain range in Europe!

🦴 3. The Cretaceous Period (Named in 1822)

• The Brains Behind It: A Belgian geologist named Jean-Baptiste d’Omalius d’Halloy.

• The Backstory: Jean-Baptiste was tasked with mapping the rocks of France, and he kept hitting massive, powdery white layers of rock. If you have ever seen a photo of the famous White Cliffs of Dover, you know exactly what he found. It turns out this rock was made of trillions of microscopic, ancient sea shells crushed together over millions of years.

• The Name: In Latin, the word for chalk is creta. Because Jean-Baptiste was basically standing on a giant mountain of ancient blackboard chalk, he named the era the Cretaceous.