Oued Ali Formation (Upper Member) at Oued Ali (Silurian to of Algeria)

Where: Algeria (29.8° N, 2.3° W: paleocoordinates 59.9° S, 30.7° E)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Oued Ali Formation, Pridoli to Pridoli (423.0 - 393.3 Ma)

• Upper Member.

• member-level stratigraphic resolution

Environment/lithology: offshore; shale and limestone

• Formation is between the Ougarta Group sandstones below and the Zeimlet Formation sandstones above.

•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.

• Noted are graptolitic shales and limestone interbeds.

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 27210: authorized by Michael Foote, entered by Michael Foote on 22.11.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Trilobita
 Phacopida - Homalonotidae
"Homalonotus roemeri" = Digonus roemeri
"Homalonotus roemeri" = Digonus roemeri de Koninck 1876 trilobite
 Phacopida - Acastidae
Acaste spinosa
Acaste spinosa trilobite
Bivalvia
 Cyrtodontida - Antipleuridae
Antipleura bohemica
Conodonta
 Prioniodontida - Icriodontidae
Icriodus woschmidti
Icriodus woschmidti Ziegler 1960 conodont
 Ozarkodinida -
"Spathognathodus steinhornensis" = Ozarkodina steinhornensis
"Spathognathodus steinhornensis" = Ozarkodina steinhornensis Ziegler 1956 conodont
Pterobranchia
 Graptoloidea - Cryptograptidae
Linograptinae indet.
Linograptinae indet. Obut 1957 graptolite
 Graptoloidea - Monograptidae
Monograptus microdon, Monograptus uniformis
Monograptus uniformis Pribyl 1940 graptolite
Crinoidea
 Monobathrida - Scyphocrinitidae
Scyphocrinites sp.
Scyphocrinites sp. Zenker 1833 Sea lily