Neugrund breccia is a type of rock consisting of gneissic breccia and amphibolite originating from the Neugrund crater.[1] Neugrund breccia is different from Ordovician breccia, which is found in a similar region but was formed millions of years later after a different meteor strike.

Neugrund breccia formed during the cementation of meteor fragments. Glacial action distributed erratics of breccia throughout an area of over 10,000 km2 surrounding the impact site.[2] Boulders of Neugrund breccia can be found in north-western Estonia and are especially concentrated around the island of Osmussaar.

The largest known Neugrund breccia formation is Skarvan. It is located near the west coast of Osmussaar.

References

  1. ^ Schmieder, Martin; Buchner, Elmar (2013-09-01). "Impaktereignisse in Europa". Zeitschrift der Deutschen Gesellschaft für Geowissenschaften. 164 (3): 387–415. doi:10.1127/1860-1804/2013/0032. ISSN 1860-1804.
  2. ^ Suuroja, Sten; Suuroja, Kalle (2004), "The Neugrund Marine Impact Structure (Gulf of Finland, Estonia)", Cratering in Marine Environments and on Ice, Berlin, Heidelberg: Springer Berlin Heidelberg, pp. 75–95, doi:10.1007/978-3-662-06423-8_5, ISBN 978-3-642-07376-2, retrieved 2022-06-21
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