Lemdad: Middle Cambrian, Morocco

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Trilobita - Ptychopariida - Conocoryphidae
Bailiella cf. levyi (Munier-Chalmas and Bergeron 1889)
Cincta - Sucocystidae
Sucocystis quadricornuta Friedrich 1993
see common names

Geography
Country:Morocco
Coordinates: 31.2° North, 7.9° West (view map)
Paleocoordinates:66.2° South, 111.2° East
Basis of coordinate:based on political unit
Geographic resolution:outcrop
Time
Period: Cambrian Epoch: Miaolingian
10 m.y. bin: Cambrian 3-4
Key time interval: Middle Cambrian Trilobite zone:  Bailiella levyi
Age range of interval: 509 - 497 m.y. ago
Stratigraphy
Formation:Bailiella
Stratigraphic resolution:formation
Lithology and environment
Primary lithology:nodular,green lithified calcareous "shale"
Secondary lithology:fine,micaceous,nodular,shelly/skeletal sandstone
Lithology description: ... lower green shales that grade upward into fine-grained, micaceous sandstones with a significant component of shell fragments and mud flakes. Numerous calcareous layers that include marly beds with shell hash („lumachelle“) or arenaceous, calcareous nodules are present and create the banded aspect of the outcrops. A particularly common faunal element of the calcareous is the name-giving trilobite Bailiella levyi.
Environment:marine indet.
Geology comments: Depositional environments of the formation are poorly known. Lower energy environments than those of the underlying Rich Khlifa Formation are represented by the Bailiella Formation although progressive wave activity is recorded towards the top of the formation. The fossil hash beds probably represent sorting by storm-wave activity, and the marly layers represent either early diagenetic carbonate dissolution and redistribution or methanogenic nodules.
Taphonomy
Modes of preservation:body,replaced with calcite
Size of fossils:macrofossils
Collection methods and comments
Collection excludes:some macrofossils
Collection methods:field collection
Reason for describing collection:taxonomic analysis
Collection method comments: Only includes brachiopods for genus/species descriptions.
Metadata
Database number:198940
Authorizer:P. Wagner Enterer:P. Wagner
Modifier:P. Wagner Research group:marine invertebrate
Created:2019-01-20 21:10:20 Last modified:2019-01-20 22:25:29
Access level:the public Released:2019-01-20 21:10:20
Creative Commons license:CC BY
Reference information

Primary reference:
67766. S. Zamora. 2009. Equinodermos del Cámbrico medio de las Cadenas Ibéricas y de la zona Cantábrica (Norte de España). 1-307 [P. Wagner/P. Wagner]