PBDB Collection

Kerrando Gourrama area, Bed 5: Concavum, Morocco

List of taxa

Where & when

Geology

Taphonomy & methods

Metadata & references

Taxonomic list

Cephalopoda - Ammonitida - Graphoceratidae

	Graphoceras concavum

	Graphoceras (Ludwigella) cornu
Cephalopoda - Ammonitida - Hammatoceratidae

	"Pseudammatoceras" diadematoides (Mayer 1871)

	Euaptetoceras sp.

	Pseudammatoceras informal sp. 1
see common names

Geography

Country:	Morocco
Coordinates:	32.2° North, 4.3° West (view map)
Paleocoordinates:	24.6° North, 8.2° East (Wright 2013)
Basis of coordinate:	estimated from map
Geographic resolution:	small collection

Time

Period:	Jurassic	Epoch:	Middle Jurassic
Stage:	Aalenian	10 m.y. bin:	Jurassic 3
Key time interval:	Concavum
Age range of interval:	174.7 - 170.9 m.y. ago

Stratigraphy

Formation:	Agoudim
Local section:	Gourrama	Local bed:	5
Local order:	bottom to top
Stratigraphic resolution:	bed
Stratigraphy comments: Lower member of the Agoudim Fm; Concavum subzone.

Lithology and environment

Primary lithology:	gray marl
Secondary lithology:	"limestone"
Lithology description: epaisse serie de marnes grises, entrecoupee par de petit bancs calcaires dont le pendage varie de 30 a 40 vers le Nord
Environment:	marine indet.

Taphonomy

Modes of preservation:	body
Size of fossils:	macrofossils

Collection methods and comments

Collection methods:	field collection
Reason for describing collection:	biostratigraphic analysis
Collection method comments: Specimen could be same as in Sadki D. and Almeras Y., 1992 - Le Brachiopods aaleno-bajociens de la region Rich (Haut-Atlas central, Maroc): implications biostratigraphiques et paleoecologiques. Cahiers Inst. Catho. Lyon, ser. Sci., 5: 93-105

Metadata

Database number:	141202
Authorizer:	M. Aberhan	Enterer:	T. Schossleitner
Modifier:	M. Clapham	Research group:	marine invertebrate
Created:	2013-03-21 21:45:41	Last modified:	2025-02-22 15:12:02
Access level:	the public	Released:	2013-03-21 21:45:41
Creative Commons license:	CC0

Reference information

Primary reference:

45839.

D. Sadki. 1994. Proposition de la region de Rich (Haut-Atlas central marocain) comme stratotype auxiliaire submediterranen pour la limite Aalenien Bajocien. Geobios 17:431-440 [M. Aberhan/T. Schossleitner]