The Upper Marine Limit in the Little Whale River area, New Quebec
ABSTRACT. The height of the upper marine limit as indicated by the lower limit of perched blocks was measured by altimeter at 21 sites. Analysis of these heights shows that the upper marine limit plane is tilted up towards 232 " 2 36". A further calculation of tilt was made by the inclusio...
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| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.513.3677 http://pubs.aina.ucalgary.ca/arctic/Arctic21-3-153.pdf |
| Summary: | ABSTRACT. The height of the upper marine limit as indicated by the lower limit of perched blocks was measured by altimeter at 21 sites. Analysis of these heights shows that the upper marine limit plane is tilted up towards 232 " 2 36". A further calculation of tilt was made by the inclusion of two levelled values obtained by Stanley (1939), and this gave a tilt up towards 277 " & 24". The varied isostatic readjustment is believed to indicate a major centre of ice dispersal in the vicinity of southern Hudson Bay/northern James Bay, during the Wisconsin Glaciation. RÉSUMÉ. La limite supérieure de la transgression marine dans la région de la Petite rivière de la Baleine, Nouveau-Québec. A l'aide d'un altimètre, on a mesuré en 21 sites l'altitude de la limite supérieure de la transgression marine, indiquée par la limite inférieure des blocs perchés. L'analyse de ces cotes d'altitude indique que le plan de la limite supérieure est relevé vers 232 " 2 36". En ajoutant deux mesures géodésiques obtenues par Stanley en 1939, on arrive à un relèvement dirigé vers 277 " s 24". On peut croire que ce rajustement isostatique variable indique la présence d'un centre majeur de dispersion glaciaire wisconsinienne au voisinage du sud de la mer d'Hudson et du nord de la baie de James. |
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