ABSTRACT.- A review of the sedimentary and fossil record around the Devonian/Carboniferous (D/C)
boundary in Sauerland at the northern border of the Rhenish Slate Mountains (Rheinisches Schiefergebirge;
Germany) forms the basis for the recognition of a succession of relative sea level changes in that area.  This
transgression/regression (T-R) curve shows a remarkable similarity with the one constructed for the La Serre
D/C boundary stratotype (Montagne Noire, France). lt is therefore suggested that these T-R curves are closely
related to global (eustatic) sea level changes.