The information on this page is a summary description.
The full formal description is available here: Someren Member
| Abbreviation | VdSo |
| Parent unit | Veldhoven Formation |
| Child units | |
| Lithological description | Light grey to green fine to very fine glauconiferous mollusc-bearing sand is characteristic for the Someren Member. |
| Age | No datation in Belgium is available. The age is Aquitanian to Burdigalian, based on datation in the Netherlands. |
| Thickness | There is only one site in Belgium where the Someren Member has been positively identified in a borehole, at Molenbeersel, borehole Molenbeersel, designated as new Belgian parastratotype for the Veldhoven Formation. The Someren Member attains a thickness of 94 m in this well, for a total thickness of 295 m of the entire formation, according to Table 1 in Dusar & Vandenberghe, 2020 (cf. Matthijs et al., 2016). |
| Area of occurrence | The upper unit or Someren Member is only known from the deepest parts of the Roer Valley Graben in Belgium and extends over adjoining tectonic blocks in The Netherlands. |
| Type locality | Borehole Veldhoven-1 (NAM) in Veldhoven (NL), [TNO-GDN (2021), http://www.dinoloket.nl/veldhoven- formation-nmve]. 860-935 m is the stratotype for the Veldhoven Formation. Parastratotype: Borehole Asten-1 (NAM) in Asten (NL), is also the stratotype for the Someren Sand Member (interval 867 – 952 m). Name derived from Someren, commune in Noord-Brabant, in proximity to location of the parastratotype borehole Asten-1. Additional Belgian parastratotype borehole Molenbeersel, drilled 1988 till final depth of 1773 m; GeoDoc 049W0226, ground level +33 m; Lambert coordinates x 247660, y 207752, Someren Member: 680 – 774 m from ground level. |
| Alternative names | HCOVv2 hydrostratigraphic code (operated by VMM (2019)) for the Someren Member (named Voort zand 2): A0257. |
| Authors | Dusar, M. & Vandenberghe, N. |
| Date | 01/09/2023 |
| Cite as | Dusar, M. & Vandenberghe, N., 2023. The Someren Member, 01/09/2023. National Commission for Stratigraphy Belgium. http://ncs.naturalsciences.be/lithostratigraphy/Someren-Member |
