Ordovician and Silurian sea-water chemistry, sea level, and climate: A synopsis Munnecke, Axel ; Calner, Mikael ; Harper, David A. T. ; Servais, Thomas Abstract Publication: Palaeogeography Palaeoclimatology Palaeoecology Pub Date: October 2010 DOI: 10.1016/j.palaeo.2010.08.001 Bibcode: 2010PPP...296..389M