Hjalmsater-Trolmen, Mickwitzia S.stone, Sweden - Jensen and Soren 1990: Atdabanian, Sweden
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Salterellidae
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Volborthella tenuis
Schmidt 1888
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unclassified
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Spatangopsis costata
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Protolyellia princeps
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Mobergellidae
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Mobergella sp.
Herdström 1923
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Hyolithelminthida
- Torellellidae
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Torellella laevigata
(Linnarsson 1871)
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Mickwitziidae
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Mickwitzia monilifera
(Linnarsson 1869)
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Mickwitzia pretiosa
Walcott 1908
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Aglaspidida
- Paleomeridae
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Paleomerus hamiltoni
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unclassified
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Cruziana sp.
d'Orbigny 1842
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Rusophycus dipar
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Diplocraterion sp.
Torell 1870
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Teichichnus sp.
Seilacher 1955
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Geography
| Country: | Sweden |
| Coordinates: | 58.6° North, 13.3° East (view map) |
| Paleocoordinates: | 41.8° South, 27.0° West |
| Geographic resolution: | local area |
Time
| Period: | Cambrian | Epoch: | Series 2 |
| Stage: | Stage 3 | 10 m.y. bin: | Cambrian 2 |
| *Period: | Early/Lower Cambrian - Middle Cambrian | *Epoch: | Caerfai |
| *International age/stage: | Atdabanian | ||
| Key time interval: | Atdabanian | Zone: | Schmidtiellus mickwitzi or Holmia inusitata |
| Age range of interval: | 521.00000 - 515.60000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Formation: | Mickwitzia Sandstone | ||||
| Stratigraphic resolution: | formation | ||||
| Stratigraphy comments: The formation reaches a thickness of about 10m. | |||||
Lithology and environment
| Primary lithology: | wave ripples,tool marks lithified sandstone |
| Secondary lithology: | claystone |
| Lithology description: fine-grained, hard, locally mica-rich sandstone with thin layers of grey-green argillaceous material. Ripples, dragmarks, and mudcracks present. | |
| Environment: | shoreface |
Taphonomy
| Modes of preservation: | cast,trace |
Collection methods and comments
| Collection methods: | field collection,survey of museum collection |
| Reason for describing collection: | paleoecologic analysis |
| Collection method comments: The material studied is from collections in the Swedish Museum of Natural History, Stockholm (SMNH); the Geological Survey of Sweden, Uppsala; the Department of Historical Geology and Paleontology, University of Lund; the private collecitons of Jan Johansson, Skillersta and Karlsson, Hjalmsater, and Jensen's own field work. Since the individual specimen counts for the previosuly listed collections are not given, the collections are grouped according to locality. | |
| Taxonomic list comments:Although supposed trace fossils caused by trilobites have been found in the Mickwitzia Sandstone, the trilobites have yet to be found in the formation. However, 6 species of olenellaceans have been described from biostratigraphically correlative beds. | |
Metadata
| Database number: | 9878 | ||
| Authorizer: | M. Patzkowsky | Enterer: | P. Borkow | Research group: | marine invertebrate |
| Created: | 2001-01-29 12:01:00 | Last modified: | 2003-07-18 18:01:39 |
| Access level: | the public | Released: | 2001-01-29 12:01:00 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 858. | S. Jensen. 1990. Predation by early Cambrian trilobites on infaunal worms - evidence from the Swedish Mickwitzia Sandstone. Lethaia 23(1):29-42 [M. Patzkowsky/P. Borkow] |