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The AAPG/Datapages Combined Publications Database
CSPG Bulletin
Abstract
Megaspores, Imperial Formation (Upper Devonian), Mountain River, District of Mackenzie: GEOLOGICAL NOTE
ABSTRACT
The Devonica and Magnifica megaspore zones (Frasnian-Famennian) are identified in the Imperial Formation at Mountain River. Palynological and lithologic evidence indicates that there is at least 118 m of sediment missing between the Ramparts Formation and the Imperial Formation at Mountain River, as compared with Imperial River and Powell Creek. Erosion at the sub-Cretaceous unconformity removed between 120 and 180 m more sediment at Mountain River than at Imperial River.
MEGASPORES DANS LA FORMATION IMPERIAL (DEVONIENNE SUPERIEURE), MOUNTAIN RIVER, DISTRICT DE MACKENZIE
RESUME
On a identifie les zones (Frasniennes-Famenniennes) aux megaspores Devonica et Magnifica dans la formation Imperial a Mountain River. Les donnees palynolgiques et lithologiques indiquent qu'a Mountain River, entre les formations Ramparts et Imperial, au moins 118 m de sediments sont disparus, en comparison des affleurements a Imperial River et a Powell Creek. A Mountain River, I'interval de sediments enleves par l'erosion sur la discordance sub-cretacee est plus epais de 120-180 m que celui a Imperial River.
Traduit par Susan Cantlie
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