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WELD TIME [3 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2009-06-10

English

Subject field(s)
  • Petrography
  • Vulcanology and Seismology
DEF

A volcanic igneous rock that forms when still-warm tephra accumulates at the Earth’s surface.

CONT

Welded tuff is a pyroclastic rock, of any origin, that was sufficiently hot at the time of deposition to weld together.

OBS

Because the particles are still warm and soft, they can weld together under the weight of overlying deposits, forming a hard rock.

OBS

Many ignimbrites are loose, unconsolidated deposits, but some exhibit welding, giving the ignimbrite the texture of a solid rock mass, hence the terms commonly used to describe these examples: welded tuff and welded ashflow.

OBS

Strictly speaking, if the rock contains scattered pea-sized fragments or fiamme in it, it is called a welded lapilli-tuff. Welded tuffs (and welded lapilli-tuffs) can be of fallout origin, or deposited from pyroclastic density currents, as in the case of ignimbrites.

OBS

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

French

Domaine(s)
  • Pétrographie
  • Volcanologie et sismologie
DEF

Formation composée de fragments de roches pyroclastiques déposés à chaud et soudés par cristallisation.

OBS

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

Spanish

Save record 1

Record 2 2002-01-04

English

Subject field(s)
  • Welding - Various Processes
DEF

One positive and one negative pulse of current within the same weld or heat time at a frequency lower than the power supply frequency from which it is obtained.

OBS

low frequency cycle (resistance welding): term standardized by the American Welding Association

French

Domaine(s)
  • Procédés de soudage divers
OBS

Un courant électrique peut être continu ou variable. Dans ce dernier cas, on distingue les courants périodiques [alternatif ou pulsatoire] et non périodiques.

Spanish

Save record 2

Record 3 1989-02-22

English

Subject field(s)
  • Arc Welding
DEF

The time during which an arc is maintained in making an arc weld.

French

Domaine(s)
  • Soudage à l'arc
OBS

Terme accepté par le Comité des lexiques des métiers (Nouveau-Brunswick).

Spanish

Save record 3

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