Zaouïa Formation
Stratigraphic range: Middle Ordovician
468–461 Ma

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Type| Geological formation
Underlies| Djurdjura Limestone
Overlies| Akaoudj Tuff
Lithology
Primary| Metamorphosed mudstone
Other| Tuff
Location
Coordinates|  [ ⚑ ] : 36°54′N 4°00′E﻿ / ﻿36.9°N 4.0°E﻿ / 36.9; 4.0
Paleocoordinates|  [ ⚑ ] 72°48′S 98°18′E﻿ / ﻿72.8°S 98.3°E﻿ / -72.8; 98.3
Region| Tizi Ouzou Province
Country| Algeria
Extent| Localized west of Aissa Mimoun Mountain
Type section
Named for| Zaouïa of Stita
Location| Sidi Namaane
Coordinates|  [ ⚑ ] 36°46′05″N 004°01′54″E﻿ / ﻿36.76806°N 4.03167°E﻿ / 36.76806; 4.03167

Zaouïa Formation (Algeria)

The Zaouïa Formation, also known as the Zaouïa Schists,[1] 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 5 kilometres (3.1 mi) northeast of Tizi-Ouzou in the municipality of Makouda,[2] in the Kabylian Mountains of northern Algeria. The type locality is about 29 kilometres (18 mi) away from the Katian outcrops of northern Djurdjura.[3]

## Contents

* 1 Description
* 2 Fossil content
* 3 See also
* 4 References
* 4.1 Bibliography

## Description

The Zaouïa Formation consists of slightly metamorphosed green or grey micaceous mudstones with many intercalated tuff beds.[3]

## Fossil content

The following fossils were reported from the formation:[2]

* Blastozoa
* Lepidocalix pulcher[4]
* Trilobites
* Colpocoryphe arago
* Pharostoma pulchra
* Hydrozoa
* Inocaulis gigas
* Pterobranchia
* Thallograptus barbieri
* Dendrograptus sp.
* ?Airograptus betieri
* Strophomenata
* Actinomena orta
* ?Strophomena barbieri

## See also

* Fezouata Formation
* Ordovician radiation

## References

1. ↑ Zaouïa Schists at Mindat.org
2. ↑ 2.0 2.1 Zaouïa of Stita at Fossilworks.org
3. ↑ 3.0 3.1 Makhlouf et al., 2017, p.301
4. ↑ Makhlouf et al., 2017, p.302

### Bibliography

* Makhlouf, Y.; B. Lefebvre; E. Nardin; A. Nedjari, and C.R.C. Paul. 2017. The diploporite blastozoan Lepidocalix pulcher from the Middle Ordovician of northern Algeria: Taxonomic revision and palaeoecological implication. Acta Palaeontologica Polonica 62\. 299–310. Accessed 2020-05-29.

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