Shale Near Beni Afeur, Petite Kabylie, NE Algeria (Silurian to of Algeria)

Where: Algeria (36.3° N, 5.0° E: paleocoordinates 72.6° S, 57.4° E)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Llandovery to Llandovery (443.4 - 419.2 Ma)

• Lower part of sequence inferred to be Llandovery on basis of graptolites. Orthocerids said to come from near top of exposures, but no age call is made for these. Based on collections 27153 and 27154, the upper parts of sequence may well be Ludlow in age.

Environment/lithology: transition zone or lower shoreface; sandy shale and micaceous shale

• Some 500km N of Pridoli shoreline and 1000km N of Llandovery shoreline, according to paleogeographic map of ref. 7455. "The Silurian shale rests on gneiss and is in an area of Oligocene age exposures."

•SEP environmental call based on given info and regional context

• "sandy shale near the base...micaceous shale stratigraphically higher"

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 27445: authorized by Michael Foote, entered by Michael Foote on 06.12.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Pterobranchia
 Graptoloidea - Monograptidae
Monograptus communis, Monograptus intermedius, "Monograptus convolutus" = Lituigraptus convolutus, Rastrites longispinus, Rastrites approximatus, Rastrites peregrinus
"Monograptus convolutus" = Lituigraptus convolutus Hisinger 1837 graptolite
Lophophorata
 Tentaculitida - Tentaculitidae
Tentaculites acuarius
Cephalopoda
 Orthocerida - Orthoceratidae
Orthoceras sacrum, Orthoceras decipiens, Orthoceras morresi