Figure 5.
Vertical magnetic susceptibility (MS) log (A) from the Baltic Basin, displaying a succession from the Ordovician–Silurian rocks of drill core C. The MS profile is compared with the natural gamma-ray wire-line logging profile (B), the percent amount of chlorite (C), total organic carbon (TOC) content, (D) and oxygen index (OI) log (E). In gray, the characteristic peaks were marked to clarify differences in trends for each parameter.