Demonstrating large-scale cooling in a Variscan terrane by coupled groundwater and heat flow modelling

- Examination of heat flow density anomalies via coupled groundwater and heat flow models.
- Karst system and fault zone cooling effects are superposed on slower pervasive groundwater flow.
- Cooling affects the Variscan thrust nappe under investigation at depths of up to 2-3 km.
- Groundwater cooling occurs in <0.5 Myr.
- These convective cooling processes account for a cold temperature anomaly in the eastern Ardennes.