Impressive images of Paleozoic outcrops in the Jabal Eghei (syn. Jabal Nuqay)

- Western Kufra Basin margin, SE Libya -

All images are presented by
Sebastian Lüning, Germany

Norbert Brügge
mailto:B14643.aol.com

Silurian Tanezzuft/Akakus layers, capped by lower Devonian Tadrart sandstones

Volcanically "cooked" Devonian sandstones/siltstones

Asterophyton fabrics in sandstones underlying the Tanezzuft "warm shale".
The feature is thought to reflect biomat growth under oxygen-deprived conditions
during the earliest Silurian.

Silurian Tanezzuft layers.
Incomplete ripples are condisered part of tempestite or turbidite mass flows

Silurian Tanezzuft warm shale bed

Silurian Tanezzuft layers

Asterophyton biomat features underneath Silurian "warm shale"

Ordovician Hawaz Formation.
Strata is dominated by vertical Skolithos (=Tigillites) burrows.
 Rare shaley/silty interbeds yield characteristic Ordovician Cruziana trace fossils

Lower to mid Ordovician Cruziana ichnospecies, Hawaz Formation

Kinneyia fabric in Silurian Akakus Sandstone.
 Fabric is thought to represent bubbles captured under biomats that probably formed
 during the late Llandovery-early Wenlock "upper hot shale" anoxic event.

Devonian trace fossil Spirophyton

Overturned fluvial crossbeds in lower Devonian Tadrart sandstone

Silurian Tanezzuft shales in foreground.
Note the two prominent Silurian shallowing upward cycles developed in the illustrated outcrop.
 Shales grade upwards into shallow marine sands (hard bed in middle of slope), capped by a flooding surface associated with clean shales. Top sands of outcrop probably represent lower Devonian Tadrart Formation

Cambrian Hassaouna sandstones

Early Silurian Tanezzuft shales: Probably Graptolites (Neodiplograptus)

Deformed Ordovician Mamouniat Formation

Trilobite burrow "Cruziana kufraensis"