| 词条 | Tetcho Formation |
| 释义 |
| name = Tetcho Formation | image = | caption = | type = Geological formation | age = {{Fossil range|Famennian|Famennian|Famennian}} | period = Famennian | prilithology = Limestone | otherlithology = Shale | namedfor = Tetcho Lake | namedby = H.R. Belyea, D.J. McLaren, 1962 | region = {{flag|British Columbia}} {{flag|Northwest Territories}} | country = {{flag|Canada}} | coordinates = {{coord|60.15500|-121.30444|display=inline,title|name=Tetcho Formation}} | unitof = | subunits = | underlies = Kotcho Formation | overlies = Trout River Formation Fort Simpson Formation | thickness = up to {{convert|75|m|ft|-1}}[1] | extent = | area = | map = | map_caption = }} The Tetcho Formation is a stratigraphical unit of Famennian age in the Western Canadian Sedimentary Basin. It takes the name from Tetcho Lake, and was first described in the Imperial Island River No. 1 well (located south of Trout Lake by H.R. Belyea and D.J. McLaren in 1962.[1] LithologyThe Tetcho Formation is composed of fine grained limestone with shale partings, silty at the base. [2]DistributionThe Tetcho Formation reaches a maximum thickness of {{convert|75|m|ft|-1}}.[2] it occurs in the sub-surface in north-eastern British Columbia and southern Northwest Territories. Relationship to other unitsThe Tetcho Formation is conformably overlain by the Kotcho Formation and conformably overlays the Trout River Formation and Fort Simpson Formation.[2] It is equivalent to the lower Wabamun Group in Alberta and to parts of the Besa River Formation in the Liard area of British Columbia. References1. ^Belyea, H.R. and McLaren, D.J., 1962. Upper Devonian formations, southern part of Northwest Territories, northeastern British Columbia and northwestern Alberta; Geological Survey of Canada, Paper 61-29, 74 p. {{Western Canadian Sedimentary Basin| Fort_Nelson=yes}}2. ^1 2 3 {{Cite web|url=http://cgkn1.cgkn.net/weblex/weblex_litho_detail_e.pl?00053:015078|title=Tetcho Formation|author=Lexicon of Canadian Geologic Units |accessdate=2009-03-01}} 2 : Stratigraphy of British Columbia|Stratigraphy of the Northwest Territories |
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