Zrigat area, SE Anti-Atlas, mud mounds (Carboniferous to of Morocco)

Also known as Reef 2839

Where: Morocco (31.0° N, 3.7° W: paleocoordinates 23.6° S, 1.1° W)

• coordinate stated in text

• local area-level geographic resolution

When: Zrigat Formation, Holkerian to Holkerian (342.8 - 336.0 Ma)

• Gnathodus texanus-Gnathodus bilineatus zones, most mounds in the G. praebilineatus zone

• group of beds-level stratigraphic resolution

Environment/lithology: reef, buildup or bioherm; lithified wackestone and lithified packstone

• 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.

Size class: macrofossils

Primary reference: 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]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 76759: authorized by Wolfgang Kiessling, entered by Uta Merkel on 03.12.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

Cyanophyceae
  - Aphralysiaceae
Aphralysia sp. Garwood 1914
Rhodophyceae
 Calcifoliida - Fasciellidae
unclassified
  -
Porifera indet. Grant 1836
Anthozoa
 Stauriida - Cyathaxoniidae
Cyathaxonia sp. Michelin 1847 horn coral
 Stauriida - Hapsiphyllidae
Hapsiphyllidae indet. Grabau 1928 horn coral
 Stauriida - Aulophyllidae
Dibunophyllum sp. Thomson and Nicholson 1876 horn coral
 Stauriida - Lithostrotionidae
Lithostrotion sp. Fleming 1828 horn coral
 Stauriida - Lophophyllidiidae
Lophophyllidiidae indet. Moore and Jeffords 1945 horn coral
 Tabulata -
Favositida indet. Wedekind 1937 tabulate coral
 Favositida - Micheliniidae
Michelinia sp. de Koninck 1841 tabulate coral
Cephalopoda
 Goniatitida - Goniatitidae
Goniatites cf. stenumbilicatus Kullmann 1961 ammonite
Gastropoda
  -
Gastropoda indet. Cuvier 1795 snail
Strophomenata
 Orthotetida - Pulsiidae
 Productida - Linoproductidae
Rhynchonellata
 Spiriferinida - Spiriferellinidae
Crenispirifer sp. Stehli 1954
 Spiriferida - Spiriferidae
 Spiriferida - Trigonotretidae
 Athyridida - Athyrididae
"Actinoconchus lamellosus" = Athyris lamellosa
"Actinoconchus lamellosus" = Athyris lamellosa Léveillé 1835
Bryozoa
  -
Bryozoa indet. Ehrenberg 1831
Terebellina
  -
Deuteropoda
  -
Ostracoda indet. Latreille 1802 ostracod
Crinoidea
  -
Crinoidea indet. Miller 1821 Sea lily
Echinoidea
  -
Echinoidea indet. Leske 1778 sea urchin