| Title | Sekwi formation, a new lower Cambrian formation in the southern Mackenzie Mountains, District of Mackenzie |
| Download | Downloads |
| Author | Handfield, R C |
| Source | Geological Survey of Canada, Paper 68-47, 1968, 23 pages, https://doi.org/10.4095/101427 |
| Year | 1968 |
| Document | serial |
| Lang. | English |
| Media | paper; on-line; digital |
| File format | pdf |
| Province | Northwest Territories |
| NTS | 95L; 105I; 105P |
| Lat/Long WENS | -130.0000 -126.0000 64.0000 63.0000 |
| Subjects | regional geology; stratigraphy; fossil lists; type sections; Sekwi Formation; Cambrian |
| Illustrations | correlation charts; stratigraphic sections |
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| Released | 1968 01 01; 2016 02 15 |
| Abstract | The name Sekwi Formation is proposed for a distinct fossiliferous carbonate unit of Early Cambrian age that outcrops in a northwest-trending belt, 160 miles by 60 miles, near the boundary between
Mackenzie and Selwyn Mountains in southwest District of Mackenzie. At the type section in the Sekwi Range the formation consists of 2, 525 feet of orange and grey weathering limestone, dolostone and sandy dolostone. Argillaceous sandstone, at least
partly of Early Cambrian age, conformably underlies the Sekwi Formation. The Sekwi Formation is disconformably overlain in places by late Middle Cambrian calcareous shale and in other places by Upper Cambrian limestone. Eastward the Sekwi changes
facies to sandstone whereas south westward it apparently changes to argillite and shale. Early Cambrian fossils found in the Sekwi Formation include aff. Fallotaspis sp. , aff . Holmia sp. , Olenellus sp. , and abundant Archaeocyatha. |
| GEOSCAN ID | 101427 |
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