Table 1 Overview of the investigated iron oolite samples from Herznach (H), Windgällen (WG) and the Erzegg profile (EE-P)

H1

2′643′884/1′258′595

Herznach Member (Ifenthal Fm)

E. Cl.–E. Oxf

H2

2′645′223/1′260′076

Sissach Member (Passwang Fm)

E. Aal.–M. Aal

WG1

2′699′640/1′183′840

Blegi Iron Oolite (Reischiben Fm)

L. Bj.–E. Cl

WG3

2′698′953/1′183′704

Blegi Iron Oolite (Reischiben Fm)

L. Bj.–E. Cl

EE-P4 to EE-P33

2′665′372/1′178′988

Planplatte Iron Oolite (Erzegg Fm)

E. Cl.–M. Cl