The Zaouïa Formation, also known as the Zaouïa Schists,
[Zaouïa Schists]
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.org is a
Middle Ordovician (
Darriwilian)
geologic formation in Algeria. The formation
crops out in the
Aïssa Mimoun Massif near Zaouïa of Stita at the confluence of Wadi Stita and Wadi Seba at about northeast of Tizi-Ouzou in the municipality of Makouda,
[ in the Kabylian Mountains of northern Algeria. The type locality is about away from the Katian outcrops of northern Djurdjura.][
]
Description
The Zaouïa Formation consists of slightly metamorphosed green or grey mica
Micas ( ) are a group of silicate minerals whose outstanding physical characteristic is that individual mica crystals can easily be split into fragile elastic plates. This characteristic is described as ''perfect basal cleavage''. Mica is co ...
ceous mudstones with many intercalated tuff beds.[Makhlouf et al., 2017, p.301]
Fossil content
The following fossils were reported from the formation:[Zaouïa of Stita]
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History
Fossilworks was cr ...
.org
* Blastozoa
Blastozoa is a subphylum of extinct echinoderms characterized by the presence of specialized respiratory structures and brachiole plates used for feeding. It ranged from the Cambrian to the Permian. Biserial, triradiate, and pentaradiate ambulacra ...
** '' Lepidocalix pulcher''[Makhlouf et al., 2017, p.302]
* Trilobite
Trilobites (; meaning "three-lobed entities") are extinction, extinct marine arthropods that form the class (biology), class Trilobita. One of the earliest groups of arthropods to appear in the fossil record, trilobites were among the most succ ...
s
** '' Colpocoryphe arago''
** '' Pharostoma pulchra''
* Hydrozoa
Hydrozoa (hydrozoans; from Ancient Greek ('; "water") and ('; "animals")) is a taxonomy (biology), taxonomic class (biology), class of individually very small, predatory animals, some solitary and some colonial, most of which inhabit saline wat ...
** '' Inocaulis gigas''
* Pterobranchia
** '' Thallograptus barbieri''
** '' Dendrograptus sp.''
** '' ?Airograptus betieri''
* Strophomenata
** '' Actinomena orta''
** '' ?Strophomena barbieri''
See also
* Fezouata Formation
The Fezouata Formation or Fezouata Shale is a geological formation in Morocco which dates to the Ordovician, Early Ordovician.
* Ordovician radiation
References
Bibliography
* {{citation , last1=Makhlouf , first1=Y. , last2=Lefebvre , first2=B. , last3=Nardin , first3=E. , last4=Nedjari , first4=A. , last5=Paul , first5=C.R.C. , year=2017 , title=The diploporite blastozoan ''Lepidocalix pulcher'' from the Middle Ordovician of northern Algeria: Taxonomic revision and palaeoecological implication , url=http://www.app.pan.pl/article/item/app002862016.html , journal= Acta Palaeontologica Polonica , volume=62 , pages=299–310 , doi=10.4202/app.00286.2016 , accessdate=2020-05-29
Geologic formations of Algeria
Ordovician System of Africa
Darriwilian
Mudstone formations
Tuff formations
Ordovician south paleopolar deposits
Paleontology in Algeria
Formations