Limestone Nodules in Shale at Oued Cherrat (Silurian to of Morocco)

Where: Morocco (33.8° N, 7.0° W: paleocoordinates 67.6° S, 22.4° E)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Ludlow to Ludlow (427.4 - 419.2 Ma)

• "The forms listed indicate a Ludlow or Pridoli age for the beds bearing them."

• formation-level stratigraphic resolution

Environment/lithology: marine; black shale and limestone

• According to paleogeographic map, some 700km N Late Silurian shoreline.
• Ref. 7455: "Limestone nodules in shale." Roch (1950), cited in ref. 7455: "schistes a nodules calcaires, noirs"

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 27196: authorized by Michael Foote, entered by Michael Foote on 22.11.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Cephalopoda
 Oncocerida -
Strophomenata
 Strophomenida - Strophomenidae
Rhynchonellata
 Atrypida - Atrypidae
Atrypa reticularis Linnaeus 1758
 Athyridida - Athyrididae
Stenolaemata
 Cyclostomata - Crownoporidae
Mitoclema sp. Ulrich 1882