Code
NUHT
Status
Formal (Bakker & Kisters 2003).
Lithologische beschrijving
Flint-bearing clay and loam, sandy. Flint concentrations in a silty matrix.
Afzettingsmilieu
Eluvial, derived by in situ weathering (cf. Felder 1961) and solution of Cretaceous limestone (chalk) (mainly Gulpen and Vaals Formations) above the phreatic groundwater level.
Definitie ondergrens
Conformable contact with non-weathered limestone (Gulpen, Vaals and Maastricht Formations).
Definitie bovengrens
May be exposed at the surface. Sharp contact with loess (Schimmert Member, Boxtel Formation) or with fluvial gravelly sand (Beegden Formation). Locally, contact with cemented sand (Holset Formation).
Dikte indicatie
Up to 10 m, concentrated in dolines and karst pipes.
Geografische verbreiding
In sinkholes and other depressions in the southeasternmost Netherlands.
Regionale correlatie
North Sea: not present; UK: Clay-with-flints Formation; GER: ?; BEL: Clay-with-flints Formation.
Ouderdom
Pliocene - recent.
Holostratotype
Well:
Depth (thickness) AH:
7- 17 m (10 m) below land surface
Oorsprong naam
Named after the village of Heijenrath, in the southeastern Netherlands.
Vorige benaming(en)
Eluvial deposits (Kuyl 1980).
Gereviewed door (datum)
Dirk Munsterman (2018), Sytze van Heteren (2019).
Referenties
Bakker, M.A.J., Kisters, P.J.M. 2003. Beschrijving lithostratigrafische eenheid. Nederlands Instituut voor Toegepaste Geowetenschappen TNO. Utrecht.
Felder, P.J. 1961. Het vuursteeneluvium in Zuid-Limburg. Grondboor & Hamer 15 (4), 337-344.
Kuyl, O.S. 1980. Toelichtingen bij de geologische kaart van Nederland 1:50.000. Blad Heerlen (62W oostelijke helft, 62O westelijke helft). Rijks Geologische Dienst, Haarlem.
Cite as
TNO-GDN ([YEAR]). Heijenrath Formation. In: Stratigraphic Nomenclature of the Netherlands, TNO – Geological Survey of the Netherlands. Accessed on [DATE] from http://acc.dinoloket.nl/en/stratigraphic-nomenclature/heijenrath-formation.