A radiocarbon-dated gelifluction lobe in the Nachvak Fiord area, northern Labrador, Canada

Auteurs :
EVANS, D.J.A.
ROGERSON, R.J.

Description :
Radiocarbon dates obtained on organic materials overriden by a gelifluction lobe allow some estimate of past gelifluction rates for a site near sea level in northern Labrador. The calculated mean gelifluction rate for the last 400 years is in the order of 8 mm/yr, somewhat higher than the average gelifluction rate described from other locations in the Canadian Arctic. The lobe contains two lithostratigraphic units : an inner diamicton, probably representing a buried gelifluction lobe, overlain by a silt/clay unit which may have been emplaced abruptly as a solifluction sheet. Mean creep rates for these units were in the order of 5 mm/yr and 15 mm/yr respectively.


Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 1988, vol. 13, n°. 7, p. 657-662, Références bibliographiques : 9 réf.

Date :
1988

Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley