View source for Earth:Naiset Formation

{{Infobox rockunit
| name           = Naiset Formation
| image          = 
| caption        = 
| type           = [[Earth:Stratigraphic unit#Lithostratigraphic units|Formation]]
| age            = [[Earth:Middle Cambrian|Middle Cambrian]]<br />~{{Fossil range|509|500}}
| prilithology   = [[Chemistry:Shale|Shale]], [[Earth:Siltstone|siltstone]]
| otherlithology = [[Earth:Sandstone|Sandstone]], [[Earth:Conglomerate (geology)|conglomerate]], [[Earth:Limestone|limestone]]
| namedfor       = Naiset Point
| namedby        = C.E. Deiss, 1940<ref name=Deiss>Deiss, C.E. 1940. Lower and Middle Cambrian stratigraphy of southwestern Alberta and southeastern British Columbia. Geological Society of America Bulletin, vol. 51, p. 731-794.</ref>
| region         = {{flag|British Columbia}}
| country        = {{flag|Canada}}
| coordinates    = {{coord|50|53|45|N|115|39|00|W|name=Naiset Formation|display=inline,title}}
| unitof         = 
| subunits       = 
| underlies      = [[Earth:Cathedral Formation|Cathedral Formation]]
| overlies       = [[Earth:Gog Group|Gog Group]]
| thickness      = Up to about 212 m (695 feet)<ref name=Glass>Glass, D.J. (editor) 1997. Lexicon of Canadian Stratigraphy, vol. 4, Western Canada including eastern British Columbia, Alberta, Saskatchewan and southern Manitoba, p. 849. Canadian Society of Petroleum Geologists, Calgary, 1423 p. on CD-ROM. {{ISBN|0-920230-23-7}}.</ref>
| extent         =
| area           =
| map            =
| map_caption    =
}}

The '''Naiset Formation''' is a [[Earth:Stratigraphy|stratigraphic]] unit of [[Earth:Middle Cambrian|Middle Cambrian]] age. It is present on the western edge of the Western Canada Sedimentary Basin in the southern Rocky Mountains of British Columbia. It consists primarily of [[Earth:Siliciclastic|siliciclastic]] rocks, and was named for Naiset Point near Mount Assiniboine by C.E. Deiss in 1940.<ref name=Glass /><ref name=Deiss />

==Thickness and lithology==
The Naiset Formation ranges in thickness from about 100 to 212 m (328 to 695 ft), and was deposited in a deep-water marine environment. It consists primarily of [[Earth:Bed (geology)|thin-bedded]] [[Chemistry:Shale|shale]] and [[Earth:Siltstone|siltstone]]. There are minor beds of [[Earth:Sandstone|sandstone]], [[Earth:Conglomerate (geology)|conglomerate]], and [[Chemistry:Calcite|calcareous]] mudstone at the base, and minor beds of [[Earth:Oolite|oolitic]] and [[Earth:Oncolite|oncolitic]] [[Earth:Limestone|limestone]] near the top.<ref name=Glass />

==Distribution and relationship to other units==
The Naiset Formation is present in Rocky Mountains of southeastern British Columbia. It [[Earth:Unconformity|unconformably]] overlies the [[Earth:Gog Group|Gog Group]]. It is overlain by the [[Earth:Cathedral Formation|Cathedral Formation]], and the contact is gradational. Equivalent strata to the east of the Kicking Horse area are assigned to the [[Earth:Mount Whyte Formation|Mount Whyte Formation]].<ref name=Glass /><ref name=Aitken>Aitken, J.D. 1997. Stratigraphy of the Middle Cambrian platformal succession, southern Rocky Mountains. Geological Survey of Canada, Bulletin 398, 322 p.</ref>

==References==
{{reflist}}


[[Category:Shale formations]]
[[Category:Siltstone formations]]
[[Category:Conglomerate formations]]

{{Sourceattribution|Naiset Formation}}