Ankirihitra, unit 1d: Early Callovian, Madagascar

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Cephalopoda - Ammonitida - Macrocephalitidae
Eucycloceras eucyclum
Cephalopoda - Ammonitida - Perisphinctidae
Indosphinctes peregrinus Spath 1931
Indosphinctes natwaris Spath 1931
Subgrossouvria cf. gudjinsirensis (Waagen 1875)
see common names

Geography
Country:Madagascar
Coordinates: 16.8° South, 46.5° East (view map)
Paleocoordinates:24.4° South, 24.2° East
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: Early Callovian
Age range of interval: 165.3 - 161.5 m.y. ago
Stratigraphy
Local section:Ankirihitra Local bed:1d
Local order:bottom to top
Stratigraphic resolution:bed
Stratigraphy comments: Indosphinctes patina zone
Lithology and environment
Primary lithology: lithified "limestone"
Secondary lithology: lithified argillaceous "limestone"
Lithology description: limestones and marly limestones with thin intercalations of marl
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:98131
Authorizer:W. Kiessling Enterer:U. Merkel
Research group:marine invertebrate
Created:2010-09-21 06:16:38 Last modified:2010-09-21 09:16:38
Access level:the public Released:2010-09-21 06:16:38
Creative Commons license:CC BY
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]