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
Praetetracrinus doreckae Jäger 1995
see common names

Geography
Country:Germany
Coordinates: 47.9° North, 8.7° East (view map)
Paleocoordinates:37.5° North, 18.3° East
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:174.70000 - 170.90000 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:2019-07-21 22:36:25
Access level:the public Released:2013-02-18 04:55:37
Creative Commons license:CC BY
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]