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CROIXAN [3 records]

Record 1 2008-12-09

English

Subject field(s)
  • Chronology
  • Geology
DEF

A stratigraphic stage name which is being used for the top of the North American Upper Cambrian.

CONT

The Cambrian is usually broken into Lower(Caerfai or Waucoban), Middle(St Davids or ALbertian) and Upper(Merioneth or Croixan) subdivisions. The faunal stages from youngest to oldest are : Franconian/Trempealeauan/Dolgellian(Upper) ;Dresbachian/Maentwrogian(Upper) ;Solvan(Middle), Menevian(Middle) ;Toyonian/Lenian/Botomian(Lower) ;Atdabanian(Lower) ;Tommatian(Lower).

OBS

Synonymous or shares same epoch with Franconian and Dresbachian.

OBS

Trempealeauan: term used at Natural Resources Canada - Earth Sciences Sector.

French

Domaine(s)
  • Chronologie
  • Géologie
DEF

Étage terminal du Cambrien d'Amérique du Nord, au-dessus du Franconien, au-dessous du Canadien.

OBS

D'après la rivière Trempealeau, Wisconsin.

OBS

Trempéaléanien : terme en usage à Ressources naturelles Canada - Secteur des sciences de la Terre.

Spanish

Save record 1

Record 2 2003-10-06

English

Subject field(s)
  • Petrography
  • Chronology
CONT

Late Cambrian sediments... Classic exposures along Mississippi River and St. Croix River-rock of Late Cambrian age in North America are referred to as St. Croixan.

CONT

St. Croixan Series.

CONT

Croixan Series, Minnesota, Wisconsin.

French

Domaine(s)
  • Pétrographie
  • Chronologie
DEF

Se dit de l'étage supérieur du système cambrien.

OBS

[Cet étage] est caractérisé par des trilobites du genre olenus en Europe et dans l'est de l'Amérique du Nord et par des trilobites du genre dicellocephalus dans l'ouest de l'Amérique du Nord.

Spanish

Save record 2

Record 3 1976-06-19

English

Subject field(s)
  • Geology
OBS

middle croixan(DMMRT), stage : upper Cambrian, North America. Name derived from Franconia, Min.(LISEU), middle upper Cambrian(GEMCA Chart IV)

French

Domaine(s)
  • Géologie
OBS

franconien: par analogie et sous toutes réserves. (HD), potsdamien moyen: Cf. "Upper Cambrian". HD 12-04-72

Spanish

Save record 3

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