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MICROFOSSIL [4 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2010-12-29

English

Subject field(s)
  • Paleontology
DEF

An apparently unicellular microfossil of unknown biological affinity ranging in age from Precambrian to Holocene.

CONT

Acritarchs are organic-walled, acid-resistant microfossils of uncertain biological affinities that are classified on the basis of their morphology.

OBS

... we know practically nothing about plankton in the Proterozoic. Consequently, we’ll talk mostly about acritarchs instead. And what exactly is an acritarch? No one is quite sure. Acritarchs are like sharks’ teeth from the Phanerozoic or cigarette butts from the 1960’s. That is, they are found everywhere, are practically indestructible, and come in a variety of interesting shapes and sizes. They look informative, but ultimately tell us rather little about the organisms or ecosystem which produced them -- other than the fact that it contained sharks or smokers, as the case may be.

OBS

acritarch: term usually used in the plural.

OBS

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

Key term(s)
  • acritarchs

French

Domaine(s)
  • Paléontologie
DEF

Forme organique sphérique hérissée d'épines présente dans les sédiments marins et pélagiques (conservation de la matière organique, surtout dans les roches siliceuses), d'origine incertaine (pontes, Protistes, spores ?), parmi les fossiles les plus anciens (Précambrien - Actuel).

CONT

À la fin du Protérozoïque apparaissent les babétosphères, les sporomorphes et les acritarches.

OBS

acritarche : terme habituellement utilisé au pluriel.

OBS

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

Key term(s)
  • acritarches

Spanish

Save record 1

Record 2 2008-03-06

English

Subject field(s)
  • Paleontology
DEF

A microfossil formed mainly from fossilized pollen and spores, but also typically containing some animal material.

OBS

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

French

Domaine(s)
  • Paléontologie
DEF

Microfossile préservé dans les sédiments.

OBS

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

Spanish

Save record 2

Record 3 1998-08-19

English

Subject field(s)
  • Federal Government Bodies and Committees (Canadian)
OBS

This laboratory specializes in microfossil(conodonts and radiolarians) processing and extraction. Geological Survey of Canada.

French

Domaine(s)
  • Organismes et comités fédéraux (Gouvernement canadien)
OBS

Ce laboratoire se spécialise dans le traitement et l'extraction de microfossiles (conodontes et radiolaires). Commission géologique du Canada.

Spanish

Save record 3

Record 4 1977-12-01

English

Subject field(s)
  • Paleontology
  • Petrography
  • Geology
OBS

index fossil : A [microfossil] that identifies and dates the strata or succession of strata in which it is found; esp. any fossil taxon(...) that combines morphologic distinctiveness with relatively common occurrence or great abundance and that is characterized by a broad, even worldwide geographic range and by a narrow or restricted stratigraphic range(range zone) that may be demonstrated to approach isochroneity.

French

Domaine(s)
  • Paléontologie
  • Pétrographie
  • Géologie
CONT

Les "microfossiles caractéristiques" (...) sont surtout ceux de relativement grande taille. Leur extension stratigraphique doit être brève, mais elle est grande en horizontale, conditions excellentes pour l'établissement des raccords et des dates.

Spanish

Save record 4

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