Shale Near Christian: Llandovery Graptolites NE of Christian: Telychian, Morocco

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Pterobranchia - Graptoloidea - Retiolitidae
Petalograptus altissimus
synonym of Petalolithus
Pterobranchia - Graptoloidea - Monograptidae
Monograptus proteus
Monograptus runcinatus
Monograptus marri
Monograptus priodon (Bronn 1835)
see common names

Geography
Country:Morocco
Coordinates: 33.3° North, 6.5° West (view map)
Paleocoordinates:79.0° South, 21.8° East
Basis of coordinate:based on nearby landmark
Geographic resolution:local area
Time
Period:Silurian Epoch:Llandovery
Stage:Telychian 10 m.y. bin:Silurian 1
*International age/stage:Early/Lower Telychian
Key time interval:Telychian
Age range of interval:438.50000 - 433.40000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Stratigraphic resolution:formation
Stratigraphy comments: "assemblage suggestive of Zone 22" (i.e. turriculatus, i.e. lower Telychian)
Lithology and environment
Primary lithology: "shale"
Lithology description: "shale"
Environment:marine indet.
Geology comments: Some 1000km NW of Llandovery shoreline, according to paleogeographic map of ref. 7455. "Shales in the vicinity of Christian...range in age from the Late Llandovery through the Ludlow. [Shales early in sequence.] The youngest beds in this area are the shales with interbedded limestone lenses and nodules."
Taphonomy
Collection methods and comments
Reason for describing collection:biostratigraphic analysis
Metadata
Database number:27440
Authorizer:M. Foote Enterer:M. Foote
Modifier:M. Foote Research group:marine invertebrate
Created:2002-12-06 04:30:01 Last modified:2006-09-13 14:01:03
Access level:the public Released:2002-12-06 04:30:01
Creative Commons license:CC BY
Reference information

Primary reference:
7455. W. B. N. Berry and A. J. Boucot. 1973. Correlation of the African Silurian rocks. Geological Society of America Special Paper 147:1-83 [M. Foote/M. Foote/M. Foote]