Zrigat area, SE Anti-Atlas, mud mounds: Holkerian - Asbian, Morocco

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Cyanophyceae - Aphralysiaceae
Aphralysia sp. Garwood 1914
Rhodophyceae - Calcifoliida - Fasciellidae
Fasciella fusa
Ostracoda
Ostracoda indet. Latreille 1802
unclassified
Terebellina sp.
Gastropoda
Gastropoda indet. Cuvier 1795
Cephalopoda - Goniatitida - Goniatitidae
Goniatites cf. stenumbilicatus Kullmann 1961
Strophomenata - Orthotetida - Pulsiidae
Schellwienella sp.
Strophomenata - Productida - Linoproductidae
Linoproductus sp. (Chao 1927)
Rhynchonellata - Spiriferida - Spiriferidae
Spirifer taigensis
Rhynchonellata - Spiriferida - Trigonotretidae
Neospirifer fascicostatus
Rhynchonellata - Spiriferinida - Spiriferellinidae
Crenispirifer sp. Stehli 1954
Rhynchonellata - Athyridida - Athyrididae
Actinoconchus lamellosus (Léveillé 1835)
recombined as Athyris lamellosa
unclassified
Bryozoa indet. Ehrenberg 1831
Echinoidea
Echinoidea indet. (Leske 1778)
Crinoidea
Crinoidea indet. Miller 1821
Anthozoa - Stauriida - Lithostrotionidae
Lithostrotion sp. Fleming 1828
Anthozoa - Stauriida - Hapsiphyllidae
Hapsiphyllidae indet. Grabau 1928
Anthozoa - Stauriida - Aulophyllidae
Dibunophyllum sp. Thomson and Nicholson 1876
Anthozoa - Stauriida - Lophophyllidiidae
Lophophyllidiidae indet. Moore and Jeffords 1945
Anthozoa - Stauriida - Cyathaxoniidae
Cyathaxonia sp. Michelin 1847
Anthozoa - Favositida
Favositida indet. Wedekind 1937
Anthozoa - Favositida - Micheliniidae
Michelinia sp. de Koninck 1841
unclassified
Porifera indet. Grant 1836
see common names

Geography
Country:Morocco
Coordinates: 31.0° North, 3.7° West (view map)
Paleocoordinates:23.6° South, 1.1° West
Basis of coordinate:stated in text
Geographic resolution:local area
Time
Period:Carboniferous Epoch:Mississippian
Stage:Visean 10 m.y. bin:Carboniferous 2
Key time interval:Holkerian - Asbian
Age range of interval:346.70000 - 336.30000 m.y. ago
Stratigraphy
Formation:Zrigat
Stratigraphic resolution:group of beds
Stratigraphy comments: Gnathodus texanus-Gnathodus bilineatus zones, most mounds in the G. praebilineatus zone
Lithology and environment
Primary lithology: lithified wackestone
Secondary lithology: lithified packstone
Includes fossils?Y
Includes fossils?Y
Lithology description: More than 100 mud mounds, up to 30 m high, base diameters of up to 300 m. 4 mound types: 1) massive crinoidal wacke- or packstones without stromatactis, 2) massive crinoidal wacke- or packstones with rare stromatactis, 3) similar to 2) but allochthonous, 4) biodetrital (skeletal) grainstone mounds.
Environment:reef, buildup or bioherm
Taphonomy
Size of fossils:macrofossils
Collection methods and comments
Collection methods:field collection
Reason for describing collection:general faunal/floral analysis
Metadata
Also known as:Reef 2839
Database number:76759
Authorizer:W. Kiessling Enterer:U. Merkel
Modifier:W. Kiessling Research group:marine invertebrate
Created:2007-12-03 07:54:37 Last modified:2007-12-04 07:27:44
Access level:authorizer only Released:2009-12-03 07:54:37
Creative Commons license:CC BY
Reference information

Primary reference:

25977. J. Wendt, B. Kaufmann, and Z. Belka. 2001. An exhumed Palaeozoic underwater scenery: the Visean mud mounds of eastern Anti-Atlas (Morocco). Sedimentary Geology 145:215-233 [W. Kiessling/U. Merkel]