Middle Werkendam Member ATWDM

 

Premise Definition after NAM and RGD (1980)
Derivatio nominis .
Type section Location map See figure (pdf)
  Well Werkendam-2 (pdf)
  Location N 51°47’29.7
E 04°50’22.1
  Depth 1953 to 2007 m
  Length 54 m along hole
  Reference NAM and RGD (1980)
Definition Consists of a marly, siltstone-sandstone alternation, which is recognisable on wire-line logs by a marked increase in sonic velocity and resisitivity values, compared to those found in the Lower and Upper Werkendam Members.
References See References Lower and Middle Jurassic

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