«Eisenoolith» (Grenchenberg-Mb.)

Representation and status

Color CMYK
(0%,29%,57%,31%)
Color RGB
R: 175 G: 125 B: 75
Rank
lithostratigraphic Bed
Validity
Unit is in Use
Status
incorrect name (though informally used)

Nomenclature

Deutsch
«Eisenoolith» (Grenchenberg-Mb.)
Français
«Oolite ferrugineuse» (Mb. du Grenchenberg)
Italiano
«Oolite di ferro» (Mb. del Grenchenberg)
English
«Iron oolite» (Grenchenberg Mb.)
Historical Variants

Oolite ferrugineuse = Eisenrogenstein (Thurmann 1832), Oolite ferrugineuse (Gonzalez 1993, Gonzalez & Wetzel 1996)

Links

Non-synonyms
Ferrugineus-Oolith

Description

Description

Spätiger, bioklastischer Kalk mit groben arenitischen Echinodermenfragmenten und Eisenoolithen. Zwischen Tempestiten und Schrägschichtung mergelige Zwischenlagen.

Thickness
Starke Schwankungen.

Components

Fossil Content
  • echinoderms

Hierarchy and sequence

Superordinate unit

Geography

Geographical extent
Nur lokal.
Type area
Mont Terri (JU)
Type profile
  • La Malcôte, bei Asuel (JU)
    Coordinates
    • (2581050 / 1254950)
    Note
    • Neudefinition bei Gonzalez 1993 (kein zusammenhängendes Profil bei Thurmann 1832).

Palaenography and tectonic

  • Dogger of the Jura Mountains
Paleogeography
Northern Tethyan Carbonate Platform :
Plateforme de Bourgogne, ... = Northern Tethyan Carbonate Platform (NTCP)
Tectonic unit (resp. main category)
Kind of protolith
  • sedimentary
Conditions of formation

Rampensedimente, Übergang vom epikontinentalen Schelf zur Plattform.

Metamorphism
non metamorphic

References

Definition
Thurmann Jules (1830) : Essai sur les soulèvemens jurassiques du Porrentruy, avec une description géognostique des terrains secondaires de ce pays, et des conditions générales sur les chaînes du Jura. 1er cahier. Mém. Soc. Hist. nat. Strasbourg 1, 84 p.

p.36: Bancs de fer hydroxidé, oolitique ou subcompacte.
Definition
Gonzalez R., Wetzel A. (1996) : Stratigraphy and paleogeography of the Hauptrogenstein and Klingnau Formations (middle Bajocian to late Bathonian), northern Switzerland Eclogae geol. Helv. 89/2, 695-720

The "Oolite Ferrugineuse" (Thurmann 1832) (not shown in Fig. 4a) occurs locally

within the Grenchenberg Beds. These iron-oolites consist of sparry, bioclastic limestones containing coarse arenitic echinoderm fragments and iron-oolites. Typically, oblique stratifications alternate with centimeter-thick marl layers.
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