Earth:Acacus Sandstone

Acacus Sandstone Stratigraphic range: Llandovery ~443–423 Ma PreЄ Є O S D C P T J K Pg N
Type	Formation
Lithology
Primary	Sandstone
Other	Shale
Location
Coordinates
Paleocoordinates	[ ⚑ ] 77.5°S 116.9°E / -77.5; 116.9
Region	Ghat District
Country	Libya
Extent	Libyan Desert
Acacus Sandstone (Libya)

The Acacus Sandstone is a geologic formation in the Ghat District, southwestern Libya. The unit preserves fossils dating back to the Llandovery epoch of the early Silurian period.

Fossil content

Paleogeography of the Early Silurian, 435 Ma

The formation has provided the following fossils:

Trilobites

• Trilobita indet.

Eurypterids

• Carcinosoma sp.
• Pterygotus sp.

Invertebrates

• Mollusca indet.

Ichnofossils

• Arthrophycus sp.
• Cruziana sp.
• Cubichnia sp.
• Dimorphichnus sp.
• Paleophycus sp.
• Pelecypodichnus sp.
• Rusophycus sp.

See also

• Fish Bed Formation, Silurian fossiliferous formations of Scotland
• Lipeón Formation, Silurian fossiliferous unit of Bolivia
• Soom Shale, Late Ordovician Lagerstätte of South Africa
• Bertie Formation, Silurian Lagerstätte of Ontario and New York
• Andean-Saharan glaciation

References

Bibliography

• Plotnick, R. E. 1999. Habitat of Llandoverian-Lochkovian eurypterids, 106–136. in A. J. Boucot, J. D. Lawson (eds.), Paleocommunities - a case study from the Silurian and Lower Devonian.