| Hedmark Group | |
|---|---|
| Stratigraphic range: Neoproterozoic–Cambrian | |
| Type | Group |
| Sub-units | Brøttum Formation, Biskopåsen Formation, Biri Formation, Ring Formation, Moelv Formation, Ekre Formation, Vangsås Formation |
| Lithology | |
| Primary | Sandstone |
| Other | Tillite, shale, conglomerate |
| Location | |
| Region | Innlandet |
| Country | Norway |
| Type section | |
| Named for | Hedmark |
The Hedmark Group is a geologic group that outcrops in Innlandet, Norway. It preserves microfossils of Neoproterozoic age. [1]
The Sturtian glaciation was a worldwide glaciation during the Cryogenian Period when the Earth experienced repeated large-scale glaciations. As of January 2023, the Sturtian glaciation is thought to have lasted from c. 717 Ma to c. 660 Ma, a time span of approximately 57 million years. It is hypothesised to have been a Snowball Earth event, or contrastingly multiple regional glaciations, and is the longest and most severe known glacial event preserved in the geologic record, after the much earlier Huronian glaciation.
The Detroit River Group is a geologic group in Michigan and Ohio. It preserves fossils dating back to the Devonian period.
The Norway Point Formation is a geologic formation in Michigan. It preserves fossils dating back to the middle Devonian period.
The Cincinnati Group is a geologic group in Kentucky, Ohio and Indiana. It is Upper Ordovician.
The Stirling Quartzite Formation is a geologic formation in the northern Mojave Desert of Inyo County, California and Nye County and Clark County, Nevada.
The Wood Canyon Formation is a geologic formation in the northern Mojave Desert of Inyo County, California and Nye County and Clark County, Nevada.
The Brigus Formation is a fossiliferous upper lower Cambrian geologic formation in Newfoundland and Labrador.
The Conception Group is a geologic group in Newfoundland and Labrador. It preserves fossils dating back to the Ediacaran period. It mainly contains turbidites, but is interrupted by a glacial diamictite, and tops out with sand and siltstones. It corresponds to the lower portion of the Connecting Point Group.
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The Dracoisen Formation is a geologic formation found on the islands of Spitsbergen and Nordaustlandet in Svalbard, Norway. It is Ediacaran in age. Microfossils have been found, including Bavinella faveolata and rare acritarchs.
The Biskopåsen Formation is a geologic formation in Innlandet. Norway. It preserves microfossils of Neoproterozoic age.
The Valhallfonna Formation is a geologic formation in Norway. It preserves fossils dating back to the Ordovician period.
The Hovinsholm Formation is a geologic formation in Norway. It preserves fossils dating back to the Ordovician period.
The Steinsfjorden Formation is a geologic formation in Norway. It preserves fossils dating back to the Silurian period.
The Adventdalen Group is a geologic group in Norway. It preserves fossils dating back to the Jurassic period.
The Gipsdalen Group is a geologic group in Norway. It preserves fossils dating back to the Permian period.
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