Oretanian section, Tachilla Fm., Anti-Atlas Mts., Morocco (Ordovician of Morocco)

Where: Morocco (32.0° N, 4.0° W: paleocoordinates 78.5° S, 98.0° E)

• coordinate estimated from map

• local area-level geographic resolution

When: Tachilla Formation, Oretanian (466.0 - 460.9 Ma)

• formation-level stratigraphic resolution

Environment/lithology: offshore; lithified, concretionary, shelly/skeletal, gray, green, argillaceous shale

• Fossiliferous nodules in green-grey to reddish shale with occasional coquinoids and grey, clayey banks

Size classes: macrofossils, mesofossils

Primary reference: C. Babin and J. Destombes. 1990. Les mollusques bivalves et rostroconches Ordoviciens de l’Anti-Atlas marocain: Intérêt paléogéographique de leur inventaire. Géologie Méditerranéenne 17:243-261 [A. Miller/P. Novack-Gottshall/P. Novack-Gottshall]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 20978: authorized by Arnold Miller, entered by Phil Novack-Gottshall on 13.06.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

• Primarily bivalve taxonomy and biostrat.
 Corynexochida - Illaenidae
? Dysplanus sp. Burmeister 1843 trilobite
 Phacopida - Dalmanitidae
Ormathops sp. Delo 1935 trilobite
 Phacopida - Pliomeridae
Placoparia sp. Hawle and Corda 1847 trilobite
 Phacopida - Homalonotidae
Plaesiacomia sp. Hawle and Corda 1847 trilobite
Colpocoryphe sp. Novak and Perner 1918 trilobite
 Phacopida - Bathycheilidae
Bathycheilus sp. Holub 1908 trilobite
 Asaphida - Asaphidae
Ogygiocaris sp. Angelin 1854 trilobite
 Beyrichiacea - Tetradellidae
Tetradella sp. Ulrich 1890 ostracod
 Hyolithida -
 Orthida - Euorthisinidae
 Modiomorphida - Modiomorphidae
Redonia sp. Rouault 1851 clam
 Cardioni - Coxiconchiidae
"Coxiconcha sp." = Coxiconchia
"Coxiconcha sp." = Coxiconchia Babin 1966 clam
 Protobranchia - Ctenodontidae
Ctenodonta sp. Salter 1852 clam
 Nuculida - Praenuculidae
Praenucula sp. Pfab 1934 clam
 Panreclinata - Dichograptidae
Didymograptus sp. McCoy 1851 graptoloid