Impressamergel-Formation

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Representation and status

Index
joI
Color CMYK
(5%,0%,2%,20%)
Color RGB
R: 195 G: 205 B: 200
Rank
lithostratigraphic Formation
Validity
Unit is in Use
Status
valid formal name
Status discussion

Nomenclature

Deutsch
Impressamergel-Formation
Français
Impressamergel-Formation
Italiano
Impressamergel-Formation
English
Impressamergel-Formation
Origin of the Name

Namengebendes Fossil: Brachiopodenart Terebratula (Aulacothyris) impressa Bronn; siehe auch Lithostratigraphisches Lexikon Deutschland (LithoLex).

Historical Variants

Oxford-Mergel, Cardioceratenschichten, marnes à Aulacothyris impressa = Impressa-Schichten (Theobald 1950), Impressamergel-Formation (STD 2002/2016, LGRB 2016)

Description

Thickness
50-110 m (LithoLex).

Hierarchy and sequence

Units at roof

Age

Age at top
  • late Oxfordian
Note about top

Bimammatum-Zone

Age at base
  • middle Oxfordian
Note about base

Transversarium-Zone

Geography

Geographical extent
Schwäbische Alb (Baden-Württemberg, SW-Deutschland).

Palaenography and tectonic

  • Malm of the Jura Mountains
Paleogeography
Argovian Basin , Swabian Basin
Tectonic unit (resp. main category)
Kind of protolith
  • sedimentary

References

Definition
Deutsche Stratigraphische Kommission (2002) : Stratigraphische Tabelle von Deutschland.
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