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ARENITE [4 records]

Record 1 2008-06-16

English

Subject field(s)
  • Petrography
DEF

A sandstone that contains more than 25% detrital rock fragments, and more rock fragments than feldspar grains.

CONT

Litharenites are sandstones that contain less than 75% quartz and in which the ratio of unstable rock fragments to feldspars is greater than 3:1.

OBS

litharenite; lithic arenite: terms used at Natural Resources Canada - Earth Sciences Sector.

French

Domaine(s)
  • Pétrographie
DEF

Ensemble des roches comportant plus de 25 % d'éléments lithiques.

CONT

[...] une arénite lithique c'est-à-dire un grès à structure jointive comportant plus de 25 % de débris de roches et de feldspaths.

OBS

litharénite; arénite lithique : termes en usage à Ressources naturelles Canada - Secteur des sciences de la Terre.

Spanish

Campo(s) temático(s)
  • Petrografía
Save record 1

Record 2 2006-07-14

English

Subject field(s)
  • Petrography

French

Domaine(s)
  • Pétrographie

Spanish

Save record 2

Record 3 2005-01-11

English

Subject field(s)
  • Petrography
DEF

[A] consolidated sedimentary rock composed of sand-sized fragments irrespective of composition; e.g. sandstone, graywacke, arkose, and calcarenite.

CONT

The arenites are subdivided into quartz arenite (more than 95% quartz grains), arkosic arenite (more than 25% feldspar and more feldspar than rock fragments), subarkose arenite (5-25% feldspar grains and more feldspar than rock fragments), lithic arenite (more than 25% rock fragments and more rock fragments than feldspar), and sublitharenite (5-25% rock fragments and more rock fragments than feldspar).

CONT

The Mufulira copper deposit occurs in Proterozoic rocks ... Chalcopyrite is the principal sulphide mineral ... Fluviatile and aeolian arenites form the footwall rocks.

OBS

The term is equivalent to the Greek-derived term, psammite ...

French

Domaine(s)
  • Pétrographie
DEF

Roche détritique dont la majorité des grains est comprise entre 2 mm et 64 µm quelles qu'en soient l'origine et la composition minéralogique.

CONT

Suivant les dimensions croissantes des grains on distingue les lutites (argiles et silts), les arénites (sablons et sables) et les rudites (graviers, galets et blocs) [...]

Spanish

Campo(s) temático(s)
  • Petrografía
OBS

Nombre con que ciertos geólogos designan a toda arena no cuarzosa producida por alteración química o disgregación.

Save record 3

Record 4 1997-09-23

English

Subject field(s)
  • Petrography
DEF

A sandstone containing abundant quartz, chert, and quartzite, less than 10% argillaceous matrix, and 10-25% feldspar (generally fresh and limpid), and characterized by an abundance of unstable materials in which the feldspar grains exceed the fine-grained rock fragments ...

OBS

It is less feldspathic and more mature than arkosic arenite. The rock is roughly equivalent to subarkose.

French

Domaine(s)
  • Pétrographie
OBS

feldsparénite : Mot-valise créé par le télescopage de «feldspath» et de «arénite».

Spanish

Save record 4

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