Pale yellow square background with black art nouveau border and text reading "Geologist's Day". Below it sits a watercolour drawing of a large, moss topped rock.

It's Geologists' Day! What are the names of the geology shop owners in Thud! -- and what's so unusual* about them?

*Unusual even by Ankh-Morpork standards

#DWCon #GeologistsDay #DiscworldTrivia