A 20-km-diameter multi-ringed impact structure in the North Sea

@article{Stewart2002A2M,
  title={A 20-km-diameter multi-ringed impact structure in the North Sea},
  author={S. Stewart and P. Allen},
  journal={Nature},
  year={2002},
  volume={418},
  pages={520-523}
}
Most craters found on Earth are highly eroded, poorly preserved and only exposed on land. Here we describe a multi-ringed impact structure discovered in the North Sea from the analysis of three-dimensional seismic reflection data. The structure is 20 km in diameter, and has at least ten distinctive concentric rings located between 2 and 10 km from the crater centre. The structure affects Cretaceous chalk and Jurassic shales, and is well preserved below several hundred metres of post-impact… Expand
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