Inden Formation NUIN

 

Premise The Inden Formation (type section in Germany; Hager (1968) Hager (1981) ) has a distribution similar to that of the Ville Formation, it also has its main development in the Lower Rhine Embayment (Germany). This formation comprises the thick Upper Seam (= Oberflöz) of that area, but associated fluvial and estuarine sands and clays make up a considerable part of the formation as well.
Derivatio nominis Named after the town of Inden (Germany: N 50°51', E 06°21').
Type section Location map See figure (pdf)
  Well Linne 58D/313 (pdf)
  Location N 51°08'35.4
E 05°56'09.6
  Depth 320.5 to 354 m
  Length 33.5 m along hole
  Reference Type section is only valid for the Netherlands.
Additional section Location map See figure (pdf)
  Well Schinveld 60D/1025 (pdf)
  Location N 50°58'42.8
E 06°00'24.0
  Depth 116.5 to 152 m
  Length 35.5 m along hole
Definition In the type area, the formation consists of a brown-coal bed of about 40m thick (Upper Seam). It laterally interdigitates with non-marine and littoral sands, and some clays. Two to three coal seams can be traced over large distances. From bottom to top: the Friesheim Seam, Kirchberg Seam and Schophoven Seam. The latter seam extends into the southeastern Netherlands. It is found e.g. in the two reference boreholes (by palynological correlation; borehole Schinveld, 116.5-130 m; borehole Linne, 320.5-323 m). In borehole Linne, coal seam Friesheim was found at 340-342.5 m. This means that in the Netherlands the formation consists mainly of coastal-plain and fluvial sand (locally with gravel) with a few intercalated brown-coal seams.
Upper Boundary It is overlain by the Kieseloölite Formation. Laterally, the formation interdigitates in the west into the marine deposits of the Breda Formation, e.g. in borehole Broeksittard (190-248 m), where the middle part of the section is glauconiferous (201-220 m).
Lower Boundary In the Netherlands, the formation is conformably underlain by beds of the Ville Formation (east) or the Breda Formation (west)
Distribution In the southeastern Netherlands the formation is restricted to the Roer Valley Graben, north of the Feldbiss fault and south of the Peel Boundary fault.
Age Early part of the Late Miocene.
Depositional Setting Coastal-lowland environment.
Sequence Stratigraphy The sequence is correlated with sequence TB 3.1.
References See References Tertiary

Van Adrichem Boogaert, H.A. & Kouwe, W.F.P., 1993-1997. [Stratigraphic unit]. In: Stratigraphic Nomenclature of the Netherlands.
Retrieved [Datum] from [url].