Where: Algeria (26.4° N, 7.3° E: paleocoordinates 67.9° S, 53.5° E)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Atafaitafa Formation, Lochkovian to Lochkovian (419.2 - 407.6 Ma)
• Ref. 7455 interprets age of formation as a whole as Gedinnian-Siegenian. The material is from about 60 m above the base of the formation, apparently only 10 m or so from the top.
• group of beds-level stratigraphic resolution
Environment/lithology: transition zone or lower shoreface; argillaceous sandstone and siltstone
•SEP environmental call based on given lith. and basic geological data provided by source ref. (PBDB 7455)
Primary reference: P. Dubois and P. Mazelet. 1964. Stratigraphie du Silurien du Tassili N'Ajjer. Bulletin de la Societe Geologique de France (Serie 7) 6(4):586-591 [M. Foote/M. Foote/M. Foote]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 27169: authorized by Michael Foote, entered by Michael Foote on 21.11.2002
Creative Commons license: CC BY (attribution)
Taxonomic list
Gastropoda | |
"Bucanella cf. derbyi" = Plectonotus derbyi
"Bucanella cf. derbyi" = Plectonotus derbyi Clarke 1899 snail | |
Bivalvia | |
Modiomorpha sp. Hall and Whitfield 1869 clam | |
Strophomenata | |
"Hipparionyx cf. minor" = Hipparionix
"Hipparionyx cf. minor" = Hipparionix | |
Rhynchonellata | |
Rhynchonellidae indet. Gray 1848 | |
Trilobita | |
Burmeisteria sp. Salter 1865 trilobite |