Lithostratigraphy of the Lower Cretaceous Coal-bearing Sequence, Foothills of Alberta, Issue 29; Issue 80
This paper is the first to porpose an integrated system of lithostratigraphic nomenclature based on detailed stratigraphic studies along the entire Foothills belt from the Crowsnest Pass area to the Peace River.
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abruptly abundant active advance Alberta appearance Arctic assemblage base beds British Columbia Cadomin calcareous Canadian carbonaceous changes climatic coal Coast Mountains common cover Creek dark grey dates deposits early evidence extension faults Figure fine grained Foothills Formation formed fragments Fraser Glaciation Geological Survey glacial glaciers grained greenish-grey grey Group horizontal indicates interval Island Lake lamination late less light grey locally lower Lowland major marine materials medium Member metres mines minor moderately Moosebar Mountain Park mudstone non-calcareous northern observed occur Olympia Overlies unit Pink Lake plant Pleistocene pollen postglacial present probably prominent Quaternary radiocarbon dates recessive region Report River rusty sand sandstone sediments sets shale siltstone similar slip southern species stratigraphic structural suggested surfaces Survey of Canada System Table tephra thick thin tundra unit upper upward Valley vegetation Waiparous weathering zone