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The Isachsen Formation is a geologic formation in the Northwest Territories and Nunavut. The Formation is a Lower Cretaceous siliciclastic succession exposed in the Sverdrup Basin of the Canadian Arctic.[1]
| Isachsen Formation | |
|---|---|
| Stratigraphic range: Aptian ~ | |
| Type | Formation |
| Sub-units | Walker Island Member |
| Overlies | Christopher Formation |
| Location | |
| Coordinates | 76°06′N 109°00′W / 76.1°N 109.0°W |
| Approximate paleocoordinates | 71°30′N 20°30′W / 71.5°N 20.5°W |
| Region | Northwest Territories, Nunavut |
| Country | Canada |
  Isachsen Formation (Canada)  Isachsen Formation (Nunavut) | |
Dating to the Aptian stage of the Cretaceous period, the formation is characterized by diverse sedimentary deposits. It preserves fossils of Polycotylidae indet., reflecting both a fluvio-deltaic and tidally-influenced marine history.[2]
See also
editReferences
edit- ↑ Tullius, D. N.; Leier, A. L.; Galloway, J. M.; Embry, A. F.; Pedersen, P. K. (2014). "Sedimentology and stratigraphy of the Lower Cretaceous Isachsen Formation: Ellef Ringnes Island, Sverdrup Basin, Canadian Arctic Archipelago". Marine and Petroleum Geology. 57: 135–151. doi:10.1016/j.marpetgeo.2014.03.007.
- ↑ Vavrek, M. J.; Wilhelm, B. C.; Maxwell, E. E.; Larsson, H. C. E. (2014). "Arctic plesiosaurs from the Lower Cretaceous of Melville Island, Nunavut, Canada". Cretaceous Research. 50: 273–281.
External links
edit- Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Archived from the original on 25 March 2022. Retrieved 17 December 2021.
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