A Billion Years Are Mysteriously Missing From Earth’s History. Now, We Know Why.
Full article267 words · extracted from 404media.co · click to collapse
Advertisement
•
· Feb 23, 2026 at 3:00 PM
The Great Unconformity — a gap in Earth’s geological record — has puzzled scientists for 150 years. New research suggests it was created by shifting continents, rather than “snowball Earths” or Cambrian life.
🌘
Subscribe to 404 Media to get The Abstract, our newsletter about the most exciting and mind-boggling science news and studies of the week.
Scientists have resolved a longstanding mystery about the Great Unconformity, a huge gap in the geological record that shows up across the world and has inspired speculation for more than 150 years, reports a study published on Monday in Proceedings of the National Academy of Sciences.
The unconformity shows up around the world when sedimentary rock that is about 500 million years old lies directly on top of far more ancient “basement” rock that can be often over 1.7 billion years old. The missing layers can represent anywhere from several million to more than a billion years, making this feature “arguably the most iconic but enigmatic gap in Earth’s stratigraphic record,” according to the new study.
This post is for paid members only
Become a paid member for unlimited ad-free access to articles, bonus podcast content, and more.
Sign up for free access to this post
Free members get access to posts like this one along with an email round-up of our week's stories.
Already have an account? Sign in
Text extracted automatically; images, tables and formatting may be missing. Original: https://www.404media.co/great-unconformity-gap-geological-record-study-columbia/