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ROCHE SEDIMENTAIRE CLASTIQUE [3 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2012-03-02

English

Subject field(s)
  • Petrography
  • Erosion and Weathering (Geol.)
DEF

A sedimentary rock that is composed of fragments of preexisting rocks.

CONT

Sandstone is a clastic rock.

CONT

... dilution of phosphates by clastics was minimal ...

OBS

As a noun, "clastic" is usually in the plural form.

PHR

Sedimentary fragmental rock.

Key term(s)
  • clastics

French

Domaine(s)
  • Pétrographie
  • Érosion et corrosion (Géologie)
DEF

[Roches] formées par l’accumulation d’éléments provenant de la désagrégation d’autres roches et [qui] peuvent contenir des éléments à granulométrie grossière et très fine.

CONT

Roche sédimentaire clastique.

CONT

[...] la dilution des phosphates par des produits clastiques a été minimale [...]

Spanish

Campo(s) temático(s)
  • Petrografía
  • Erosión y corrosión (Geología)
Save record 1

Record 2 2007-09-17

English

Subject field(s)
  • Petrography
DEF

Sandstone consisting chiefly of quartz grains cemented by quartz, the cement often having crystallographic continuity around each grain.

OBS

Skolnick (1965) believes that most sedimentary quartzites are compacted sandstones developed by pressure solution of quartz grains.

OBS

quartzitic sandstone: A term used by Krynine ... for a sandstone that contains 100% quartz grains cemented with silica. The term is essentially equivalent to "orthoquartzite."

OBS

"Quartzite" is a word used interchangeably for both metamorphic quartzite (known as metaquartzite) and sedimentary quartzite (known as orthoquartzite).

OBS

quartzite: The preferred name [is] orthoquartzite ...

OBS

qtze: ... abbreviation ... used in drilling reports.

OBS

orthoquartzite; orthoquartzitic sandstone; sedimentary quartzite: terms used at Natural Resources Canada - Earth Sciences Sector.

PHR

Feldspathic, micaceous, pyritic quartzite.

French

Domaine(s)
  • Pétrographie
DEF

Roche sédimentaire clastique, composée de grains de quartz intimement cimentés.

CONT

Les quartzites vrais sont caractérisés par un développement beaucoup plus important de la silice secondaire, à tel point que les grains arrivent à se toucher en se moulant les uns sur les autres et à former ainsi une sorte de mosaïque. La silice secondaire s’oriente optiquement sur le grain originel [...] Les quartzites les plus fréquents proviennent de la consolidation de sables.

OBS

grès quartzitique : Intermédiaire entre grès quartzeux et quartzite, mais bien souvent synonyme de quartzite par absence de limites nettes.

OBS

orthoquartzite; quartzite sédimentaire : termes en usage à Ressources naturelles Canada - Secteur des sciences de la Terre.

PHR

Quartzite feldspathique, micacé, pyriteux.

Spanish

Campo(s) temático(s)
  • Petrografía
DEF

Roca formada esencialmente por cuarzo. Deriva de una arenisca por intenso metamorfismo. Es una roca común y corriente, en la que la solución y cristalización de la sílice ha dado lugar a una roca compacta de granos de cuarzo entrelazados.

CONT

Las cuarcitas de origen sedimentario no son sino arenas primitivas cuyos granos han sido trabados ulteriormente por un cemento de cuarzo naciente. Su estructura se asemeja a la de la arenisca pero, al contrario de ésta, que, al romperse deja íntegros los granos de arena en la superficie de rotura, la fractura de las cuarcitas rompe también esos granos.

CONT

Otras cuarcitas, presentes entre los micasquistos y los neis son, como estos dos minerales, el resultado de la transformación de otras rocas por el proceso de metamorfismo.

Save record 2

Record 3 1992-07-06

English

Subject field(s)
  • Petrography
CONT

The Val d'Or-Malartic gold district ... consists of alternating belts of volcanic and Timiskaming-type clastic sedimentary rocks, adjacent to the extensive clastic sedimentary sequence of the Pontiac Subprovince to the south....

CONT

The erosion of these [passive continental margins] results in the rapid deposition of thick deposits of clastic sedimentary rocks known as turbidites ... These evaporites and turbidites are ideal environments for the formation of oil and gas deposits...

French

Domaine(s)
  • Pétrographie
OBS

Voir fiches "roche sédimentaire" et "roche clastique".

Spanish

Save record 3

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