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PALEOKARSTIC [1 record]

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Record 1 2006-11-15

English

Subject field(s)
  • Speleology
  • Paleontology
CONT

paleokarstic surface : A surface, preserved within a carbonate succession, that was formed by the effects of karst erosion. The presence of a paleokarstic surface indicates that during the deposition of the full rock sequence the young rocks were exposed to the effects of surface(subaerial) erosion. During such a nondepositional and erosional phase a full suite of karst features, including caves, could develop.

CONT

These surfaces are interpreted as palaeokarstic because the pits are: (1) perpendicular to bedding and not the present land surface; (2) infilled with very poorly sorted siltstone, and (3) overlain by lignitic shales indicating terrestrial influx. The presence of two palaeokarstic surfaces in late maastrichtam limestones suggest short-period cycles in relative sea level ...

OBS

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

French

Domaine(s)
  • Spéléologie
  • Paléontologie
CONT

À la base du Membre 10 (Éocène), les grès blancs à l'Éocène inférieur, pourraient être comparés avec leurs homologues du domaine Ghomaride : dans ce dernier domaine, ils sont transgressifs sur une surface de paléokarst [...] et marquent le premier retour du régime marin après la longue histoire des émersions mésozoïques.

PHR

Surface paléokarstique.

Spanish

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