Figure 4From: How do permeable fractures in the Triassic sediments of Northern Alsace characterize the top of hydrothermal convective cells? Evidence from Soultz geothermal boreholes (France) Core sample from a sandstone in the Buntsandstein at 1,204-m depth in the well EPS-1. The core sample exhibits a part of a fracture zone (1) and its damage zone (2). Barite and galena fill the hydraulic breccia. The diameter of the core sample is 8 cm.Back to article page