Where: Algeria (27.5° N, 7.5° W: paleocoordinates 60.4° S, 20.5° E)

• coordinate estimated from map

• local area-level geographic resolution

When: Pridoli to Pridoli (423.0 - 393.3 Ma)

• "The brachiopod, trilobite, and graptolite fauna of this sandstone-shale part of the stratigrahpic column indicates that it is of Pridoli to Gedinne age and supports Gevin's (1960, p. 98) suggestion that the Silurian age deposits are continuous with those of Early Devonian age. He records Siegen and Emsian age sandstones stratigraphically above the probable Gedinne age beds. A conglomerate layer or an interval of conglomeratic sandstone occurs at the base of the Siegen age beds as well as in the interval of the Gedinne age beds."

• formation-level stratigraphic resolution

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

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 27456: authorized by Michael Foote, entered by Michael Foote on 06.12.2002

Creative Commons license: CC BY (attribution)