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Bjørkasholmen
| Formation | Bjørkasholmen |
|---|---|
| Age: | 485 - 468 Ma Paleozoic |
| Interval | Tremadocian |
| Lithology | limestone, framestone |
| Number of Collections | 12 |
| Number of Occurrences | 28 |
Recorded Sample Locations
| Location | Region | Stratigraphic Name |
|---|---|---|
| Slemmestad [Bjørkasholmen Fm] | Røyken, Asker, Viken, Norway | Bjørkasholmen |
| Øvre Øren | Modum, Buskerud, Norway | Bjørkåsholmen |
| Bjørkasholmen Penninsula | Asker, Viken, Norway | Bjørkasholmen |
| Slemmestad area | Røyken, Asker, Viken, Norway | Bjørkåsholmen |
| Bjerkåsholmen Penninsula | Asker, Viken, Norway | Bjørkåsholmen |
| Modum | Modum, Buskerud, Norway | Bjørkåsholmen |
| Oslo | Oslo, Norway | Bjørkåsholmen |
| Trefoldighetskirken | St. Hanshaugen, Oslo, Norway | Bjørkåsholmen |
| Ottenby | Mörbylånga, Öland, Kalmar County, Sweden | Bjørkåsholmen |
| Mossebo | Valdemarsvik, Östergötland County, Sweden | Bjørkåsholmen |
Associated Units
| Stratigraphic Name | Age | Lithology | Occurrence Records |
|---|---|---|---|
| Alum Shale | 182 - 176 Ma Early Jurassic | shale/"limestone", "shale", "limestone"/"shale", grainstone, mudstone, "shale"/lime mudstone, "limestone" | 428 |
| Arnestad | 458 - 450 Ma Late/Upper Ordovician | shale/"limestone", "shale", "limestone"/"shale", "limestone" | 159 |
| Bønsnes | 450 - 443 Ma Paleozoic | limestone/lime mudstone, "limestone", "shale"/"limestone" | 97 |
| Ceratopyge Limestone | 485 - 485 Ma Paleozoic | limestone | 2 |
| Elnes | 464 - 461 Ma Middle Ordovician | shale/"limestone", "shale", "limestone" | 122 |
| Elnes - Hakavik | 466 - 461 Ma Middle Ordovician | sandstone/"shale", "shale"/"limestone", mudstone/grainstone | 25 |
| Grimsøya | 450 - 446 Ma Late/Upper Ordovician | limestone, "limestone"/"shale" | 33 |
| Huk | 468 - 464 Ma Middle Ordovician | limestone | 2 |
| Huk - Hukodden | 472 - 468 Ma Ordovician | limestone | 8 |
| Huk - Lysaker | 468 - 464 Ma Middle Ordovician | shale, "limestone" | 55 |
| Huk - Svartodden | 468 - 464 Ma Middle Ordovician | wackestone, "limestone", "shale" | 13 |
| Latorp | 478 - 466 Ma Ordovician | limestone, sandstone | 22 |
| Nakholmen | 456 - 452 Ma Late/Upper Ordovician | lime mudstone/"limestone", "shale"/"limestone", "limestone", "shale" | 93 |
| Solvang | 456 - 446 Ma Late/Upper Ordovician | limestone/"shale", "limestone", "shale" | 216 |
| Tøyen - Hagastrand | 485 - 470 Ma Paleozoic | shale/"limestone", "limestone"/"shale", "limestone" | 121 |
Recorded Fossils
References
Data courtesy of: PBDB: The Paleobiology Database, Creative Commons CC-BY licenced. , GBIF: the Global Biodiversity Information Facility, various licences, iDigBio, various licences, and EOL: The Encyclopedia of Life (Open Data Public Domain). Because fossils are made of minerals too!
