A new type of solar-system material recovered from Ordovician marine limestoneOPEN ACCESS
B. Schmitz, Q. -Z. Yin, M. E. Sanborn,M. Tassinari,C. E. Caplan & G. R. Huss Nature Communications 7, Article number:ncomms11851 doi:10.1038/ncomms11851 Published 14 June 2016 LINK (OPEN ACCESS) PDF (OPEN ACCESS) “From mid-Ordovician ~470 Myr-old limestone…