The Korbach fissure, which outcrops in an abandoned quarry near Korbach (He
sse, Germany), contains a famous Permian tetrapod fauna and is hosted by Pe
rmian marine carbonate rocks. Petrography of the host rock indicates strong
dedolomitization related with precipitation of carbonate cements. Carbon a
nd oxygen isotope data show the influence of isotopically light carbon and
oxygen from the vadose zone in the immediate vicinity of the fissure, indic
ating that the Korbach fissure acted as a conduit for meteoric fluids durin
g the Permian time. (C) 2000 Elsevier Science B.V. All rights reserved.