1. Origin of spherulitic and cone-in-cone concretions in Cambro-Ordovician black shales, St Lawrence Estuary, Quebec, Canada. (4th June 2019) Authors: Hesse, Reinhard; Fong, Christopher; Schumann, Dirk Journal: Geological magazine Issue: Volume 156:Number 10(2019) Page Start: 1793 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗