The information on this page is a summary description.
The full formal description is available here: Jauche Member
| Abbreviation | JAU |
| Parent unit | Chalk group |
| Child units | |
| Lithological description | From bottom to top the Cretaceous strata at Orp-Jauche comprise: – sands and sandy marls at the base of the white chalks; – calcarenitic or sandy facies of the white chalk; – very fine-grained white chalk with black flints; – coarse-grained chalk with bed with rolled pebbles and nodules at the base; – calcarenites with Thecidea papillata, flints and a pebble bed at the base; – unconformably overlain by Palaeocene sands and marls with flint pebbles at the base. |
| Age | The Late Maastrichtian brachiopod Thecidea papillata occurs in great numbers in the Jauche Member. |
| Thickness | 0.20 m to 2 m. |
| Area of occurrence | |
| Type locality | Stratotype: at old quarry at Orp-le-Grand (Orp-Jauche, east Brabant). |
| Alternative names | |
| Authors | Robaszynski, F., Dhondt, A.V. & Jagt, J.W.M. |
| Date | 01/01/2001 |
| Cite as | Robaszynski, F., Dhondt, A.V. & Jagt, J.W.M., 2001. The Jauche Member, 01/01/2001. National Commission for Stratigraphy Belgium. https://ncs.naturalsciences.be/lithostratigraphy/Jauche-Member |
| Additional information | Remarks: Previously known as Tuffeau dOrp-le-Grand in Thielens (1871-1872), Rutot & Van den Broeck (1887-1888), Leriche (1929), Marlière (1957). The denomination Orp-le-Grand was used previously by Thielens (1871-1872) for two levels in the section one of Maastrichtian age and one of Palaeocene age. Vincent (1873) used Sables heersiens dOrp- le-Grand for this Palaeocene formation, generally today called Sables dOrp. Thus, it was necessary to introduce a new name for the Cretaceous lithostratigraphic unit, and since today Orp and Jauche belong to the same administrative unit, it was decided to name it Jauche Member. |
