Babaudus (impactite) – 27.50g fragment

Rochechouart impact structure or Rochechouart astrobleme is an impact structure in France. Erosion has over the millions of years mostly destroyed its impact crater, the initial surface expression of the asteroid impact, leaving highly deformed bedrock and fragments of the crater’s floor as evidence of it.

The age of the Rochechouart impact is a matter of debate. The ages (within the error bars) spans from less than 150 million years ago to over 240 million years. Since late 1990s the spreading has reduced and the last four determinations (since 2010) are converging toward an age between 203 and 207 million years during the Rhaetian, two to five million years older than the Triassic–Jurassic boundary.