Ankirihitra, unit 2b: Middle Callovian, Madagascar

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Bivalvia - Ostreida - Palaeolophidae
Alectryonia gregarea (Sowerby 1816)
Cephalopoda - Ammonitida - Oppeliidae
Cephalopoda - Ammonitida - Perisphinctidae
Grossouvria evexa Quenstedt 1885
see common names

Geography
Country:Madagascar
Coordinates: 16.8° South, 46.5° East (view map)
Paleocoordinates:29.7° South, 36.5° East (Wright 2013)
Basis of coordinate:based on nearby landmark
Geographic resolution:small collection
Time
Period: Jurassic Epoch: Middle Jurassic
Stage: Callovian 10 m.y. bin: Jurassic 5
Key time interval: Middle Callovian
Age range of interval: 165.3 - 161.5 m.y. ago
Stratigraphy
Local section:Ankirihitra Local bed:2b
Local order:bottom to top
Stratigraphic resolution:bed
Stratigraphy comments: Oecoptychius refractus and Phlycticeras franconicum zone
Lithology and environment
Primary lithology: lithified marl
Secondary lithology: lithified "limestone"
Environment:marine indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:field collection
Reason for describing collection:taxonomic analysis
Metadata
Database number:98133
Authorizer:W. Kiessling Enterer:U. Merkel
Research group:marine invertebrate
Created:2010-09-21 06:29:36 Last modified:2025-02-22 15:12:02
Access level:the public Released:2010-09-21 06:29:36
Creative Commons license:CC0
Reference information

Primary reference:
8015.PGAP 1022H. Besairie and M. Collignon. 1972. Geologie de Madagascar I. Les Terrains Sedimentaires. Annales Geologiques de Madagascar 35:1-463 [A. Rees/A. Rees]