Where: Algeria (29.8° N, 2.3° W: paleocoordinates 72.2° S, 37.7° E)
• coordinate based on nearby landmark
• local area-level geographic resolution
When: Oued Ali Formation, Ludlow to Ludlow (427.4 - 419.2 Ma)
• Middle Member, several collecting levels whose graptolite faunas collectively suggest ages between Early Ludlow and Pridoli.
• member-level stratigraphic resolution
Environment/lithology: offshore; shale and limestone
•SEP environmental call based on scanty given information and geological context provided by source ref (PDBD 7455). Note that this unit is mud dominated but contains fairly abundant limestone beds.
Primary reference: 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]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 27209: authorized by Michael Foote, entered by Michael Foote on 22.11.2002
Creative Commons license: CC BY (attribution)
Taxonomic list
Bivalvia | |
Slava imperficieus clam | |
Cardiola interrupta clam | |
Pterobranchia | |
Monograptus cf. roemeri, Monograptus colonus, Monograptus nilssoni, Monograptus fritschi, Monograptus scanicus, Monograptus sp., Monograptus leintwardiensis, Pristiograptus sp., "Monograptus bohemicus" = Bohemograptus bohemicus
Monograptus cf. roemeri graptolite
Monograptus colonus graptolite
Monograptus nilssoni graptolite
Monograptus fritschi graptolite
Monograptus scanicus graptolite
Monograptus sp. graptolite
Monograptus leintwardiensis graptolite
Pristiograptus sp. graptolite
"Monograptus bohemicus" = Bohemograptus bohemicus Barrande 1850 graptolite | |
"Monograptus ultimus" = Neocolonograptus ultimus
"Monograptus ultimus" = Neocolonograptus ultimus Perner 1899 graptolite |