Geisingen/Donau, sample 8: Middle Aalenian, Germany
collected by M. Jager 1984
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
|
Crinoidea
- Cyrtocrinida
- Tetracrinidae
|
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| see common names | |||||||
Geography
| Country: | Germany |
| Coordinates: | 47.9° North, 8.7° East (view map) |
| Paleocoordinates: | 35.0° North, 30.1° East (Wright 2013) |
| Basis of coordinate: | based on nearby landmark |
| Geographic resolution: | outcrop |
Time
| Period: | Jurassic | Epoch: | Middle Jurassic |
| Stage: | Aalenian | 10 m.y. bin: | Jurassic 3 |
| Key time interval: | Middle Aalenian | Brachiopod zone: | Brasilia bradfordensis |
| Age range of interval: | 174.7 - 170.9 m.y. ago |
Stratigraphy
| Formation: | Opalinus Clay | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: Upper Opalinus clay, near boundary beween concavum and murchisonae zones. Bottom centimeters of mudstone above calcareous nodules. =Layer 6 in Dietl & Rieber (1980). Collection 31990 is combination of samples 7 and 8, but they are not separated in that reference. | |||||
Lithology and environment
| Primary lithology: | lithified mudstone |
| Environment: | carbonate indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Reason for describing collection: | taxonomic analysis | ||
| Museum repositories: | SMNS | ||
| Collectors: | M. Jager | Collection dates: | 1984 |
Metadata
| Database number: | 139787 | ||
| Authorizer: | M. Clapham | Enterer: | M. Clapham |
| Modifier: | P. Wagner | Research group: | marine invertebrate |
| Created: | 2013-02-18 04:55:37 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2013-02-18 04:55:37 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 44974. | M. Jäger. 1995. Echinodermata aus dem Ober-Toarcium und Aalenium Deutschlands I. Crinoidea: Cyrtocrinina und Millericrinina. Stuttgarter Beiträge zur Naturkunde Serie B (Geologie und Paläontologie) 226:1-51 [M. Clapham/M. Clapham] |