Krekling, Hagastrand member: Tremadocian - Floian, Norway
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Geography
| Country: | Norway | State/province: | Eiker-Sandsvær |
| Coordinates: | 59.7° North, 9.7° East (view map) | ||
| Paleocoordinates: | 37.0° South, 14.8° West | ||
| Basis of coordinate: | based on nearby landmark | ||
| Geographic resolution: | outcrop |
Time
| Period: | Ordovician | Epoch: | Early/Lower Ordovician |
| Key time interval: | Tremadocian - Floian | Trilobite zone: | Megistaspis (Paramegistaspis) planilimbata |
| Age range of interval: | 485.40000 - 470.00000 m.y. ago |
Stratigraphy
| Formation: | Tøyen | Member: | Hagastrand |
| Stratigraphic resolution: | member |
Lithology and environment
| Primary lithology: | green silty "shale" |
| Secondary lithology: | coarse "limestone" |
| Lithology description: "Here the Hagastrand Member is readily accessible, above the (presently unexcavated) Bjørkåsholmen Formation. Fjelldal ( 1966, p. 21) records the lowest part of the Hagastrand Member as 50-60 cm of green, silty shale, fining upwards, and containing some inarticulate brachiopods in the upper part. The limestone facies of the Hagastrand Member, begins, however, with a thin, coarsely crystalline calcite layer, which gives way to more micritic limestone (mostly a marl) with horizontal and vertical intercalations of grey to black shale. All six main beds have a similar texture and, in hand specimens, the fossils occur randomly orientated in the rock. The lowest bed cleared in 1995 is overlain by 12 cm of unfossiliferous shale and then more limestone. | |
| Environment: | carbonate indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils,mesofossils |
Collection methods and comments
| Reason for describing collection: | taxonomic analysis |
Metadata
| Database number: | 190974 | ||
| Authorizer: | B. Kröger | Enterer: | B. Kröger |
| Created: | 2018-01-02 07:41:08 | Last modified: | 2018-01-02 07:41:08 |
| Access level: | the public | Released: | 2018-01-02 07:41:08 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 63969. | O. A. Hoel. 1999. Trilobites of the Hagastrand Member (Tøyen Formation, lowermost Arenig) from tbe Oslo Region, Norway, Part Il : Remaining non-asaphid groups. Norsk Geologisk Tidsskrift 79:259-280 [B. Kröger/B. Kröger] |
Secondary references:
| 59771 | O. A. Hoel. 1999. Trilobites of the Hagastrand Member (Tøyen Formation, lowermost Arenig) from the Oslo Region, Norway, Part 1: Asaphidae. Norsk Geologisk Tidsskrift 79:179-204 [P. Wagner/P. Wagner/B. Kröger] |