Supplementary information

From the following article

Asteroid breakup linked to the Great Ordovician Biodiversification Event

Birger Schmitz, David A. T. Harper, Bernhard Peucker-Ehrenbrink, Svend Stouge, Carl Alwmark, Anders Cronholm, Stig M. Bergström, Mario Tassinari & Wang Xiaofeng

Nature Geoscience 1, 49 - 53 (2008) Published online: 16 December 2007

doi:10.1038/ngeo.2007.37